2004 696. O. Cojocari, S. Biber, M. Rodriguez-Girones, B.

Mottet, L. Marchand, L.-P. Schmidt and H.L. Hartnagel, “A new structural approach for uniform sub-micrometer anode metallization of planar THz Schottky components“, Semicond. Sci. Technol. 19 (2004) 537-542.

697. V. Litovchenko, A. Evtukh, Yu. Kryuchenko, N. Goncha-ruk, O. Yilmazoglu, K. Mutamba, H. Hartnagel, and D. Pavlidis ”Quantum-Size Resonance Tunneling in the Field Emission Phenomenon”, Journal of Applied Physics 96 (2004) 867-877.

698. O. Cojocari, S. Biber, B. Mottet, H.-L. Hartnagel

and L.-P. Schmidt, “GaAs Schottky diode fabrication for THz-frequency mix-er applications“, Proc. of the 28th “Workshop on Compound Semiconductor Device and Integrated Circuits held in Europe”, WOCSDICE’04, Smolenice, Slowakei (17-19.5.2004) 121-122.

699. P.H. Handel, H.L. Hartnagel, K.E. Sia, U.K. Mishra, and R. York, ”GaN HEMT geometry and piezoelectric quantum 1/f noise”, Proc. Pof the 28th “Workshop on Compound Semiconductor Device and Integrated Circuits held in Europe”, WOCSDICE’04, Smolenice, Slowakei (17-19.5.2004)85-87.

700. R. Mendis, C. Sydlo, J. Sigmund, M. Feiginov, P. Meissner, and H.L. Hartnagel “Continuous-wave terahertz system for spectroscopy and imaging“, Proc. of the 28th “Workshop on Compound Semiconductor Device and Integrated Circuits held in Europe”, WOCSDICE’04, Smolenice, Slowakei (17-19.5.2004)123-124

701. A.A. Evtukh, H. Hartnagel, V.G. Litovchenko, M.O. Semenenko, and O. Yilmazoglu ”Enhancement of electron field emission stability by nitrogen-doped diamond-like carbon film coating”, Semicond. Sci. Technol. 19 (2004) 923-929.

702. I. Tiginyanu, V. Popa, O. Volciuc, O. Cojocari, V. Ursaki, D. Pavlidis and H. Hartnagel ”Photoelectrochemical etching of GaN as a tool for smooth etching and formation of pores and wires”, to be presented at MRS meeting Boston

703. R. Mendis, C. Sydlo, J. Sigmund, M. Feiginov,P. Meiss-ner, H.L. Hartnagel “Tunable CW-THz system with a log-periodic photoconduc-tive emitter”, Solid State Electronics 48 (2004) 2041-2045.

704. C. Vicente, M. Mattes, A. Cervello, D. Wolk, B. Mottet, H.L. Hartnagel, J.R. Mosig, and D. Raboso ”Prediction of corona discharge: Towards a simulation tool for arbitrary geometries”, Proceedings of the JINA Symposium 2004, Nice, France (8.-11.11.2004) 27

705. H.L. Hartnagel, C.-I Lin, M. Rodriguez, V. Ichizli, M. Saglam, P. Szeliga “Recent Development in Device Technology for Integrates THz-Circuits”, GAAS 2000, Paris (October 2-6, 2000)

706. M. Saglam, M. Bozzi, C. Domato, A. Megej, M. Rodriguez-

Gironez, L. Peregrini, H.L. Hartnagel ”AlGaAs HBV perfor-mance in frequency tripling at 255 GHz”, GAAS 2000, Paris (October 2-6, 2000)

707. M. Saglam, A.C. Irvine, and H.L. Hartnagel

”Heterostructure Barrier Varactors on Gold Substrate”, Proceedings of the 13th European Workshop on Heterostructure Technology 2004, HETECH’04, Koutoul-fari, Heraklion, Crete, Greece(October 3-6, 2004)

708. A. Vincze, J. Kovac, R. Srnanek, J. Sigmund, H.L. Hartnagel, G. Irmer ”Annealing behaviour of low temperature grown GaAs in-vestigated by raman spectroscopy”, Proceedings of the APCOM 2004 conference (2004)

709. A. Vincze, M. Michalka, J. Podskocova, J. Sigmund, J. Kovac, H.L. Hartnagel ”Annealing investigation of LT GaAs with AFM”, Proceedings of the APCOM 2004 conference (2004)

710. A. Altes, K. Mutamba, R. Heiderhoff, H.L. Hartnagel,

L.J. Balk ”Scanning near field thermal microscopy on a microm-achined thin membrane”, Superlattices and Microstructures 35 (2004) 465-476.

711. O. Cojocari, V. Popa, V.V. Ursaki, I.M. Tiginyanu,

K. Mutamba, M. Saglam and H.L. Hartnagel, “Micrometer-size GaN Schottky-Diodes for MM-wave Fre-quency Multipliers”, Conference Digest of the 2004 Joint 29th Int. Conference on IRMMW and 12th Int. Conf. on Terahertz Electronics, Karlsruhe, Germany (27.9 – 1.10.2004) 317-318

712. O. Cojocari, V. Popa, V.V. Ursaki, I.M. Tiginyanu, H.L. Hartnagel, and I Daumiller ”GaN Schottky multiplier diodes prepared by electro-plating: a study of passivation technology”,. Semicond. Sci. Technol. 19 (2004) 1273-1279.

713. V.N. Zverev, M. Muhammad, S. Rahman, P. Debray, M. Saglam, J. Sigmund, and H.L. Hartnagel ”Magnetotransport properties of two-dimensional elec-tron gas in AlSb/InAs quantum well structures designed for device applications”, Journal of Applied Physics Vol. 96, No 11 (1 December 2004) pp. 6353-6356.

714. C. Vicente, M. Mattes, A. Cervello, D. Wolk, B. Mottet, H.L. Hartnagel, J. Mosig, and D. Raboso ”Multipactor and Corona Discharge”, Prediction in Rectangular Waveguide Based Microwave Components. International Workshop on Microwave Fil-ters, 13-15 September 2004, CNES, Toulouse, France

715. S. Biber, O. Cojocari, G. Rehm, B. Mottet, L.-P. Schmidt, H.L. Hartnagel, “A Novel System for Systematic Microwave Noise and DC Characterization of THz Schottky Diodes”, IEEE Transactions on Instrumentation and Measurement, Vol.53, No.2 (April 2004) 581-587

716. B. Mottet, C. Sydlo, B. Kögel, Q. de Robillard, O. Cojocari and H.L.Hartnagel, “The Impact Of Process Optimisation On Planar THz-Schottky Device Reliability”, Proc. of the IEEE 42nd Int. Reliability Phys. Symp., Phoenix, Arizona, USA (April 25-29, 2004) 575-576

717. J. Schür, S. Biber, F. Gumbmann, B. Mottet, O. Cojoca-

ri, L.–P.Schmidt, H.–L. Hartnagel, “Micromachined Split-block Schottky-Diode Mixer for 600GHz”, Conference Digest of the 2004 Joint 29th Int. Conference on IRMMW and 12th Int. Conf. on Terahertz Electronics, Karlsruhe, Germany (27.9. –1.10.2004) 325-326

718. O. Cojocari, S. Biber, B. Mottet, C. Sydlo, H.L. Hartnagel and L.-P. Schmidt, „IF-noise improvement of the GaAs Schottky diodes for THz-frequency mixer applications“, Proc. of European Microwave Week 2004, Amsterdam, The Netherlands (11-15 October 2004) 211-214

719. H.L. Hartnagel, M. Dragoman, „Tuning of Quantum-Electronic Devices by Actuating the MEMS Structure“, Romanian Journal of Information Science and Technology Vol.7, No 3-4 (2004) 343-352

720. C. Sydlo, B. Kögel, O. Cojocari, H.L. Hartnagel and P. Meissner, “Characterisation of a circularly-toothed planar loga-rithmic-periodic antenna for broadband power detec-tion”, Frequenz 9-10 (2004) 207-210.

721. O. Cojocari, B.Mottet, M. Rodriguez-Girones, S. Biber, L. Marchand, L.-P. Schmidt, and H.L. Hartnagel, “A new structural approach for uniform sub-micrometer anodemetallization of planar THz Schottky components,” Semiconductor Science and Technology 19 (2004) 537–542

722. O. Cojocari, V. Popa, V.V. Ursaki, I.M. Tiginyanu, H.L. Hartnagel, and I. Daumiller, “GaN Schottky multiplier diodes prepared by electro-plat-ing: a study of passivation technology,” Semiconductor Science Technology 19 (2004) 1273–1279

723. O. Cojocari, V. Popa, V.V. Ursaki, I.M. Tiginyanu, K. Mutamba, M. Saglam, and H.L. Hartnagel, “Micrometer-size GaN Schottky-diodes for MM-wave fre-quency multipliers,” Conference Digest of the 2004 Joint 29th Int. Conf. on IRMMW and 12th Int. Conf. on Terahertz Electronics, Karlsruhe, Germany,Sept.27-Oct.1, 2004) 317–318

724. K. Mutamba, M. Saglam, C. Sydlo, A. Megej,

H.L. Hartnagel, I. Daumiller, ”Varactor Diodes on the Basis of Al0.4Ga0.6N/GaN Heterostructures”, Romanian Journal of Information Science and Technology Vol.7, No 3-4 (2004) 289-295

725. R. Mendis, C. Sydlo, J. Sigmund, M. Feiginov, P. Meissner, and H.L. Hartnagel, “Tunable CW-THz system with a log-periodic photoconductive emitter,” Solid State Electronics 48,No.10-11 (2004) 2041–2045

726. R. Mendis, C. Sydlo, J. Sigmund, M. Feiginov, P. Meissner, and H.L. Hartnagel, “Tunable CW-THz system with LTG-GaAs based log-periodic emitter,” Vortrag Terahertz Workshop 2004, Freiburg, Germany (Paper veröffentlicht unter 725)

727. R. Mendis, C. Sydlo, J. Sigmund, M. Feiginov, P. Meissner, and H.L. Hartnagel, “Coherent generation and detection of continuous te-rahertz waves using two photomixers driven by laserdi-odes”, Proc. of the Joint 29th Int. Conf. In-frared and Milli-meter Waves & 12th Int. Conf. Terahertz Electronics, Karl-sruhe, Germany (2004), and Int. J. Infrared Millimeter Waves 26, No. 2 (Feb. 2005) 201-207

2005

728. R. Mendis, C. Sydlo, J. Sigmund, M. Feiginov, P. Meissner, H.L. Hartnagel ”Spectral Characterization of Broadband THz Antennas by Photoconductive Mixing: Towards Optimal Antenna De-sign”, IEEE Antennas and Wireless Propagation Letters 4 (2005) 85-88.

729. H.L. Hartnagel ”Proposal for Fine-Tuning of Current across MEMS Device by Quantum-Electronic Structure”, Frequenz 7-8/2005, Vol. 59 (Juli/August 2005) pp. 206-207

730. O. Cojocari, S. Biber, B. Mottet, M. Rodriguez-

Girones, H.L. Hartnagel, and L.-P. Schmidt, “Dc and IF-noise performance optimization of GaAs schottky diodes for THz applications,” Semiconductor Science Technology 20 (2005) 23–32

731. C. Sydlo, R. Mendis, J. Sigmund, M. Feiginov, H.L. Hartnagel, and P. Meissner, “Binary optical mixing for broadband THz communica-tion,” Proc. of the IEEE/ACES Internat. Conference, Honululu, Hawaii (April 2005)

732. J. Sigmund, C. Sydlo, H.L. Hartnagel, N. Benker,

H. Fuess, F. Rtz, T. Kleine-Ostmann, and M. Koch, “Structure Investigation of Low-Temperature-Grown GaAsSb, a Material for Photoconductive Terahertz Anten-nas”, Applied Physics Letter 87 (2005) 252103

733. C. Sydlo, B. Kögel, O. Cojocari, M. Feiginov, H.L. Hartnagel, and P. Meissner, “Broadband power detector using a circularly-toothed planar logarithmic-periodic antenna,” ANTEM 11th Int. Symp., Saint Malot, France (15-17.06.2005)

734. C. Sydlo, R. Mendis, J. Sigmund, M. Feiginov, H.L. Hartnagel, and P. Meissner, ”Binary optical mixing for broadband THz communica-tion”, Proc. of the 2005 IEEE/ACES Int. Conf. on Wireless Com-munications and Appl. Computational Electromagnetics, Hilton Hawaiian Village, Honolulu, Hawaii, 3-7 April 2005

735. C. Sydlo, J. Sigmund, H.L. Hartnagel,R. Mendis, M. Feiginov, and P. Meissner, “Planar Terahertz Antenna Optimisation”, Proc. of the 2005 IEEE/ACES Int. Conf.on Wireless Com-munications and Appl. Computational Electromagnetics, Hilton Hawaiian Village, Honolulu,Hawaii, 3-7 April 2005

736. V. Litovchenko, A. Evtukh, O. Yilmazoglu, K. Mutamba, H.L. Hartnagel, and D. Pavlidis, ”Gunn effect in field-emission phenomena”, Journal of Applied Physics 97 (2005) 044911

737. B. Mottet, C. Sydlo, K. Mutamba, O. Cojocari,

H.L. Hartnagel, ”RF and Thermal Design of Compound Semiconductor Devic-es using MEMS Approach”, Frequenz 59 (Mai-Juni 2005) 131-136

738. C. Vicente, M. Mattes, D. Wolk, H.L. Hartnagel, J.R. Mosig, D. Raboso, ”FEST3D – A Simulation Tool for Corona Prediction”, Proc. of the 5th International Workshop on Multipactor, Corona and Passive Intermodulation in Space RF Hardware (MULCOPIM 2005), ESTEC, Noordwijk, The Netherlande, 12-14. September 2005, pp 227-233

739. C. Vicente, D. Wolk, H.L. Hartnagel, D. Raboso,

”An Investigation on Passive Intermodulation Generation at Waveguide Junctions”, Proc. of the 5th International Workshop on Multipactor, Corona and Passive Intermodulation in Space RF Hardware (MULCOPIM 2005), ESTEC, Noordwijk, The Netherlande, 12-14. September 2005, pp 207-214

740. C. Sydlo, O. Cojocari, D. Schoenherr, T. Goebel,

P. Meissner and H.L. Hartnagel, “Fast THz detectors based on InGaAs Schottky Diodes”, Frequenz 59(2005) p. 7-8

741. D. Wolk., C. Vicente, H.L. Hartnagel, M. Mattes, J.R. Mosig, D. Raboso, ”An Investigation on the Effect of Fringing Fields on Multipactor Breakdown”, Proceedings of the 5th International Workshop on Multipactor, Corona and Passive Intermodulation in Space RF Hardware (MULCOPIM 2005), ESTEC, Noordwijk, The Netherlande, 12-14. September 2005, pp 93-99

742. C. Vicente, M. Mattes, D. Wolk, H.L. Hartnagel, J.R. Mosig, D. Raboso, ”FEST3D – A Simulation Tool for Multipactor Predic-tion”, Proceedings of the 5th International Workshop on Multipactor, Corona and Passive Intermodulation in Space RF Hardware (MULCOPIM 2005), ESTEC, Noordwijk, The Netherlande, 12-14. September 2005, pp 11-17

743. C. Vicente, H.L. Hartnagel, ”Passive-Intermodulation Analysis Between Rough Rectangular Waveguide Flanges”, IEEE Transactions on Microwave Theory and Techniques, Vol. 53, No. 8 (August 2005) 2515-2525

744. O. Cojocari, C. Sydlo, H.L. Hartnagel and I.M.

Tiginyanu, ”Quasi-Vertical Schottky-Structures for THZ-Applications”, Proceedings of the 4th International Conference on Microelectronics and Computer Science (ICMCS’05), September 15-17, 2005, Chisinau, Moldova, pp. 219-225

745. J. Sigmund, C. Sydlo, H.L. Hartnagel, R. Teissmann, N.

Benker, H. Fuess, F. Rutz, and M. Koch, “Non-stoichiometric growth and precipitation formation in LTG-GaAsSb for THz-applications“, Proc. of the 23rd North American Conference on Molecular Beam Epitaxy (NAMBE 2005), September 11-14, 2005, Santa Barbara, California (2005) p. 153

746. J. Sigmund, C. Sydlo, H.L. Hartnagel, N. Benker, H. Fuess, F. Rutz, T. Kleine-Ostmann, and M. Koch, “Structure investigation of low-temperature-grown GaAsSb, a material for photoconductive terahertz anten-nas“, Applied Physics Letters 89, 252103 (2005)

747. H.L. Hartnagel, ”The Introduction of Quantum Electronic Structures for MEMS Devices”, Lithunian Journal of Physics Vol 45, No. 6 (2005)

748. M. Dragoman, H.L. Hartnagel, J. Tuovinen, and R. Pla-na, “Microwave Applications of Carbon Nanotubes“, Frequenz 59 (2005)pp. 251-263

749. D. Roy Chowdhury, M. Saglam, K. Mutamba, H.L. Hartna-gel ”A Novel Way to Reduce Conduction Current in Al0:7Ga0:3As/GaAs Heterostructure Barier Varactors”, Proceedings of the Int. Conf. IWPSD 2005, New Delhi, India, December 2005 (Vortrag gehalten von Cowdhury), (2005) pp 817-821

750. P.H. Handel, A.G. Tournier, H.L. Hartnagel, U.K. Mish-ra, and R. York, ”1/f Noise in GaN/AlGaN HFET Based Amplifiers”, Proceedings of WOCSDICE 2005, Cardiff, United Kingdom, 15-18 May 2005, pp.101 – 103

750a. P.H. Handel, A.G. Tournier, H.L. Hartnagel, U.K. Mish-ra, and R. York, ”Quantum 1/f Noise in GaN/AlGaN HFET Based Oscilla-tors”, Proceedings of WOCSDICE 2005, Cardiff, United Kingdom, 15-18 May 2005, pp.209 – 211

751. H.L. Hartnagel, ”Cantilever Bending Identified by Resonant Tunnelling Structure”, Proceedings of WOCSDICE 2005, Cardiff, United Kingdom, 15-18 May 2005, pp.31 – 33

2006

752. M. Dragoman, A. Cismaru, H. Hartnagel, R. Plana,

”Reversible metal-semiconductor transitions for micro-wave switching applications”, Applied Physics Letters 88, 073503 (2006)

753. A. Evtukh, V. Litovchenko, M. Semenenko, O. Yil-mazoglu, K. Mutamba, H.L. Hartnagel and D. Pavlidis, ”Formation of conducting nanochannels in diamond-like carbon films”, Semicond.Sci. Technol. 21 (2006) pp. 1326–1330

754. H. Halbritter, C. Sydlo, B. Kögel, F. Riemenschneider, S. Jatta, H.L. Hartnagel, “Micromechanic Effects and their Impact on the Charac-teristics of MEMS-tunable Lasers“, Proc. of the Int. Conf. MEMS 2006, Aug. 2006, Montana USA

755. H. Halbritter, C. Sydlo, B. Kögel, F. Riemenschneider, H.L. Hartnagel,and P. Meissner, “Linewidth and Chirp of MEMS-VCSELs“, IEEE Photonics Technology Letters 18, No. 20, 15 Octo-ber 2006, pp.2180-2182

756. O. Cojocari and H.L. Hartnagel, ”Generalized model of the metal/n-GaN Schottky interface and improved performance by electrochemical Pt deposition”, Journal Vacuum Science Technol. B 24(6), Nov./Dez. 2006, pp. 2544-2552

757. H.L. Hartnagel, “Compound Semiconductors Two-Terminal Devices Technolo-

gy for Milimeter and Submilimeter Frequencies” Proceedings of TARGET DAYS 2006, 16-18. October 2006, Frascati, Italy, pp. 19–22

758. K. Mutamba, C. Sydlo, O. Yilmazoglu, D. Neculoiu,

G. Konstantinidis, A. Georgakilas, Z. Chatzopoulos, A. Müller and H.L. Hartnagel, ”New Compound Semiconductor Technology for Advanced RF MEMS Applications” Proceedings of the Mediteranean Microwave Syposium (MMS’06), 18 – 21 Sept. 2006, Genova, Italy

759. H.L. Hartnagel,

”Terahertz-Antenna Concepts for the Illumination of Shaped Objects”, Proceedings of the International Conference WOCSDICE 06, 14-17 May 2006, Fiskebäckskil, Sweden, p. 79

760. J. Schür, S. Biber, O. Cojocari, L.-P. Schmidt, H.L. Hartnagel, “Comparative Noise Characterization and Conversion Loss Measurements of Schottky Diode Mixers at 600 GHz”, Proceedings of the International Conference WOCSDICE 06, 14-17 May 2006, Fiskebäckskil, Sweden, pp. 85-87

761. K. Mutamba, O. Yilmazoglu, O. Cojocari, C. Sydlo, D. Pavlidis and H.L. Hartnagel, ”Technology of Wide-Bandgap Diode Structures for High-Frequency Operation”, Superlattices and Microstructures 40 (2006) 363-368

762. K. Mutamba. O. Yilmazoglu, C. Sydlo, M. Mir, S. Hubbard, G. Zhao, I. Daumiller and D. Pavlidis. ”Technology Aspects of GaN-based Diodes for High-Field Operation”, Proceedings of the International Semiconductor Confer ence, Sinaia, Romania, Vol 1 (Sept. 2006) 85-92

763. J. Sigmund, D. Pavlidis, H. L. Hartnagel, N. Benker,

and H. Fuess, “Nonstoichiometric growth and cluster formation in low temperature grown GaAsSb for terahertz-applications” J. Vac. Sci. Technol. B 24 (2006) 1556

2007

764. M. Dragoman, A. Takacs, A.A. Muller, H. Hartnagel, R.

Plana, K. Grenier, and D. Dubic, ”Nanoelectromechanical switches based on carbon nano-tubes for microwave and millimetre waves”, Applied Physics Letters 90 (2007) 113102-1 - 113102-3

765. C. Vicente, D. Wolk, H.L: Hartnagel, B. Gimeno, V.E. Boria and D. Raboso, ”Experimental Analysis of Passive Intermodulation at Waveguide Flange Bolted Connections” IEEE Transactions on Microwave Theory and Techniques Vol. 55, No. 5 (May 2007)pp. 1018-1028

766. M. Dragoman, A. Müller, D. Neculoiu, G. Konstan-

tinidis, K. Grenier, D. Dubuc, L. Bary, R. Plana, H. Hartnagel, E. Fourn, E. Flahaut, ”Carbon-Nanotube-based Microwave and Millimeter Wave Sensors”, submitted to Applied Physics Letters (2007)

767. D.S. Ong and H.L. Hartnagel, ”Quasi-ballisitic Reflections and THz Harmonics Generation in Double Heterojunction Structures”, submitted to Applied Physics Letters (2007)

768. R. Kunkel, A. Beling, H.-G. Bach, G.G. Mekonnen, D. Schmidt, C. Sydlo, D. Schönherr, M. Feiginov, H.L. Hartnagel, and P. Meissner, “Monolithic integration of a waveguide-integrated p-i-n-photodiode and a planar antenna for THz applica-tions”, Proc. of the Optical Terahertz Science and Technology, Topical Meeting (OTST 2007), Orlando, Florida, USA, 18-21 March 2007, Optical Society of America, pp. TUC5

769. D. Neculoiu, G. Konstantinidis, A. Müller, A. Kostopoulos, D. Vasilache, K. Mutamba, C. Sydlo, H.L. Hartnagel, L. Bary and R. Plana, ”Microwave FBAR Structures Fabricated using Microm-achined GaN Membranes”, Proceedings of the 2007 IEEE MTT-S Int. Microwave Sym-posium, Honolulu, Hawai (June 3-8, 2007)

770. M. Dragoman, A. Cismaru, A.A. Müller, D. Dragoman, H.

Hartnagel, R. Plana, “RF NEMS-Carbon-Nanotube Based Nanoelectromechanical Systems for Microwave and Millimeter Wave Applica-tions“, Proceedings of the 8th Int. Symposium on RF MEMS and RF Microsystems (MEMSWAVE 2007), Barcelona, Spanien (26-29 Juni 2007)

771. O. Cojocari, I. Oprea, C.Sydlo, R. Zimmermann, A. Walzer, R. Henneberger and H.-L. Hartnagel, “THz Schottky Diodes on Epitaxial AlGaAs-Membrane“, Proc. of the Int. Conference …. Cardiff, UK (2007)

772. D.S. Ong and H.L. Hartnagel, ”Novel concept for THz signals generation in hetero-structures”, Phys. Stat. Sol. (RRL) 1, No. 4 (2007) 150-152

773. O. Yilmazoglu, H.L. Hartnagel, D. Pavlidis, A. Evtukh,

V. Litovchenko, M. Semenenko, T. Gorbanyuk, A. Grigoriev, “Pecularities of Electron Field Emission from Nanostructured GaN and AlGaN“, Proc. of the 3rd Ukrainian Conference on Semiconductor Physics, Odessa, Ukraina, 17-22 June 2007, p. 120

774. D.S. Ong and H.L. Hartnagel, ”Generation of THz signals based on quasi-ballistic electron reflections in double-heterojunction structures”, Semiconductor Science and Technology 22 (2007) 981-987

775. C. Vicente, H.L. Hartnagel, ”Passive Intermodulation at Junctions”, Proc. of the IEEE MTT- Int. Microwave Symposium, Honolulu, Hawaii (3-8 June 2007)

776. O. Cojocari, I. Oprea, C.Sydlo, R. Zimmermann, A. Wal-ber, R. Henneberger and H.-L. Hartnagel, „Design and Characterization of Schottky-Structures for THz-Applications“ Frequenz 7-8, Vol. 61 (2007) 172-175

777. H. Halbritter, C. Sydlo, B. Kögel, F. Rie-menschneider, H.L. Hartnagel, and P. Meissner, ”Impact of Micromechanics on the Linewidth and Chirp Performance of MEMS-VCSELs”, IEEE Journal of Selected Topics in Quantum Electronics, Vol. 13, No. 2 (March/April 2007) pp. 367-373

778. V. Litovchenko, A. Evtukh, M. Semenenko, A. Grygoriev, O. Yilmazoglu, H.L. Hartnagel, L. Sirbu, I,M, Tiginyanu and V.V. Ursaki, “Electron Field Emission from Narrow Band Gap Semicon-ductors (InAs)”, Semicond. Sci. Technol. 22, No. 10 (2007) 1092-1096

779. B. Nicolae, D. Roy Chowdhury and H.L. Hartnagel, „Experimental and modelled configuration of double-barrier HBV based on Al0.7Ga0.3As/GaAs“ accepted for Proc. of the 14th IWPSD, Mubai, India (Dec. 16-20, 2007)

780. H.L. Hartnagel, “Microwave applications of carbon nanotubes: New ideas based on concepts found in the literature”, Vortrag auf NANO-Symposium 2007 “Nanoscale Phenomena - Fundamentals and Applications”, Chisinau, Moldova (19-22 Sept. 2007)

781. H.L. Hartnagel, “New Nanomeric Opportunities With High Mobility Semi-conductors Such as InAs”, Vortrag auf ICMCS 2007

782. D. Schönherr, C. Sydlo. T. Goebel, M. Feiginov, H.L. Hartnagel, P. Meissner, H.-G. Bach, R. Kinkel, G.G. Me-konnen and R. Zhang, „Characterization of Thz emitter based on a high-speed p-i-n photodiode“, Proc. to the IRMMW-THz, Cardiff,GB (2-7 Sept. 2007)

783. M. Dragoman, A. Müller, D. Neculoiu, G. Konstan-tinidis, K. Grenier, D. Dubuc, L. Bary, R. Plana, H. Hartnagel, E. Fourn, E. Flahaut, ”Carbon-Nanotube-based Microwave and Millimeter Wave Sensors”, Proc. of the European Wicrowave Week 2007, München (8-12 Oct. 2007)

784. D.S. Ong and H.L. Hartnagel, ”A New concept for THz Frequency Multipliers”, Proc. Of the APMC 2007, Bangkok, Thailand (December 11-14, 2007) 1703-1706

785. B. Nicolae, D. Roy Chowdhury and H.L. Hartnagel, “S Parameter Measurements of Superlattice Heterostruc-ture Barrier Junctions towards THz Varactors”, Frequenz 11-12, Vol 61 (Nov-Dec 2007) 245-246

786. B. Nicolae, D. Roy Chowdhury, G. Pop, H.L. Hartnagel, D. Pasquet, “The Planar Approach to a Al0.12Ga0.88N/GaN Based Double Barrier HBV”, Frequenz 11-12, Vol 61 (Nov-Dec 2007) 247-249

787. J. Sigmund, K. Zogal, J F Lampin, V Ivannikov, C Syd-lo, M Feiginov, D Pavlidis, P Meissner and H L Hartna-gel, “Low-temperature grown GaAsSb with sub-picosecond pho-tocarrier lifetime for continuous-wave terahertz appli-cations” Proceedings of the 7th Topical Workshop on Heterostruc-ture Microelectronics (TWHM’07) Kazusa Arc (Kazusa Akademia Center), Kisarazu, Chiba, Japan, August, 21-23, 2007

787a. T. Goebel, D. Schoenherr, C. Sydlo, M. Feiginov,

P. Meissner and H.L. Hartnagel, “Resonant Metal Gratings for THz Material Characteri-zation”, Proc. of the International Conference on Infrared and Millimetre Waves (2007)

2008

788. A. Evtukh, O. Yilmazoglu, V. Litovchenko, M. Semenen-

ko, T. Gorbanyuk, A. Grigoriev, H. Hartnagel, and D. Pavlidis, “Electron Field Emission from Nanostructured Surfaces of GaN and AlGaN”, Phys. Stat. Sol. © No. 2 (2008) 425-430

789. D.S. Ong and H.L. Hartnagel, “Enhanced THz frequency multiplier efficiency by quasi-ballistic electron reflection in double-heterojunction structures”, EPL, 81 (2008) 48004

790. B. Nicolae, D. Roy Chowdhury and H.L. Hartnagel, “Experimental studies of Al0.12Ga0.88N/GaN heterostructure varactors in view of frequency increases”, Proceedings of the German Microwave Conference (GEMIC 2007), Hamburg(10-12 March 2008)260-262

791. M. Koeberle, T. Göbel, D. Schönherr, S. Mueller, R. Jakoby, P. Meissner and H-L. Hartnagel, “Material characterization of liquid crystals at THz-frequencies using a Free Space Measurement Setup”, Proceedings of the German Microwave Conference (GEMIC 2007), Hamburg(10-12 March 2008)146-149

792. M. Ruf, J. Schür, B. Nicolae, L.-P. Schmidt and H.L. Hartnagel, “Design considerations for a fixed tundes 300 GHz heterostructure barrier charge swing trippler”, Proceedings of the German Microwave Conference (GEMIC 2008), Hamburg(10-12 March 2008)139-141

793. M. Dragoman, G. Konstantinidis, D. Dragoman, D. Neculoiu, A. Cismaru, R. Plana, H. Hartnagel, A. Kostopoulos, R. Buiculescu, “Simple nanoeletromechanical systems for Giga-applications” Proc. of the 9th Int. Symposium MEMSWAVE 2008, 29.-4.7.2008, Crete, Greece

794. M. Dragoman, G. Konstantinidis, A. Kostopoulos, D. Dragoman, D. Neculoiu, R. Buiculescu,R. Plana, H. Hartnagel, „Multiple negative resistances in trenched structures bridged with carbon nanotubes“ Proceedings of MEMSWAVE 2008, Crete, Heraklion; Applied Physics Letters 93, Issue 4 (2008) 043117

795. I. Park, C. Sydlo, I. Fischer, W. Elsässer and H.L.Hartnagel, „Generation and spectroscopic application of tunable continuous-wave terahertz radiation using a dual-mode semiconductor laser“, Meas. Sci. Technol. 19 (2008) 065305 (9pp)

796. B. Nicolae, D. Roy Chowdhury and H.L. Hartnagel, “Experimental Studies of Al0.12Ga0.88N/GaN heterostructure barrier varactors in view of frequency increases”, Proceedings of GEMIC 2008, Hamburg (10-12.3.2008)

797. Hans. L Hartnagel, „Future Electronic Frontiers“, International Journal of Mocrowave and Optical Technol-ogy (IJMOT) Vol. 3, No. 3 (July 2008)139 143

798. Goebel, T., Schoenherr, D., Sydlo, C., Cojocari, O., Deninger, A., Meissner, P. and Hartnagel, H. L., “Fast Continous-Wave THz Spectrometer, in 'Microwave Technology and Techniques”, Workshop MWWT at ESTEC, Noordwijk, The Netherlands 6-7 May 2008)

799. C. Sydlo, O. Cojocari, D. Schönherr,T. Göbel, P. Meißner and H.L. Hartnagel, “Fast THz detectors based on InGaAs Schottky Diodes”, Frequenz 5/6 (2008) 107-110

800. T. Göbel, D. Schönherr, P. Meissner, H.L. Hartnagel, A. Roggenbuck, F.-X. Laroche, A. Deninger, „Extern stabiliesierte DFB-Laser zur hochauflösenden Dauerstrich-Terahertz-Spektroskopie“, “Externally Stabilized DFB Lasers for High Resolution CW THz Spectroscopy”, tm Technisches Messen 75 (2008) 12, pp 623-630

801. Schoenherr, D., Cojocari, O., Sydlo, C., Gö bel, T., Hartnagel, H. L. and Meissner, P., “Broadband Schottky Diode Based THz Detector”, Proc. of WOCSDICE 2008, Leuven Belgien (18-21.5.2008)

802. Sydlo, C., Cojocari, O., Schönherr, D., Göbel, T.,

Jatta, S., Hartnagel, H. L. and Meissner, P., “Ultrawideband THz detector based on a zero bias Schottky diode”, Proc. of the 19th International Symposium on Space Te-rahertz Technology (ISSTT 2008), Groningen. The Nether-lands (28.-30.04.2008)P8-3

803. O. Yilmazoglu, D. Pavlidis, H.L. Hartnagel, A. Evtukh, V. Litovchenko, and N. Semenenko, „Evidence of satellite valley position in GaN by photo-exited field emission spectroscopy“, Journal of Applied Physics 103 (2008) 114511

804. Schoenherr, D.; Cojocari, O.; Sydlo, C.; Goebel, T.; Feiginov, M.; Hartnagel, H. & Meissner, P., "Optical Mixing in THz Schottky Diodes", Proceedings of the IRMMW-THz 2008, Pasadena, CA, USA (15.-19.09.2008)

805. S. Hargreaves, L.J. Bignell, R.A. Lewis, D.

Schoenherr, M. Saglam and H. Hartnagel, "Investigation of THz Emission by p-GaAsSb", Proc. of the 214th ECS Meeting, Honolulu, 2008

806. S. Hargreaves, L. Bignell, R. Lewis, D. Schoenherr, M. Saglam and H. Hartnagel, "Investigation of p-GaAsSb as a new candidate THz emitter", Journal of the Electrochemical Society ECS 155 (2008) H734-H737

807. B. Nicolae, M. Ruf, J. Schür, L.-P. Schmidt and H.L. Hartnagel, „A Heterostructure Barrier Charge Swing device for fre-quency multiplication at 306 GHz“, Proc. of the International Microwave Symposium (IMS 2008), Atlanta, Georgia, USA (15.-20.06.2008) 1545-1548

808. T. Göbel, D. Schoenherr, C. Sydlo, M. Feiginov, P. Meissner and H.L. Hartnagel “Direct phase detection in continuous-wave photomixing THz systems” IEEE Lasers and Electro-Optics Society, 21st Annual Meeting LEOS (2008) 222-223

809. T. Göbel, D. Schoenherr, C. Sydlo, M. Feiginov,

P. Meissner and H.L. Hartnagel „Continuous-wave terahertz system with electro-optical terahertz phase control“; Electronic Letters 44, No. 14 ( 3. July 2008)

810. J. Sigmund, J.-F. Lampin, V. Ivannikov, C. Sydlo, M. Feiginov, D. Pavlidis, P. Meissner, H.L. Hartnagel, “Low-Temperature Grown GaAsSb with Sub-Picosecond Photocarrier Lifetime for Continuous-Wave Terahertz Measurements”; IEICE Trans. Electron. Vol. E91-C, No. 7 (July 2008) 1058 – 1062

811. D. Schönherr, H.L. Hartnagel, S. Hargreaves, R.A. Lew-is and M. Henini; “Time-domain THz spectroscopy using acceptor-doped GaAs photoconductive emitters”; Semicond. Sci. Technol. 23 (2008) 105012 (7 pp)

812. M. Dragoman, G. Konstantinidis, D. Dragoman, D. Ne-

culoiu, A. Cismaru1, F. Coccetti, R. Plana, H. Harnagel, A. Kostopoulos, R. Buiculescu “RF NEMS Based on carbon nanotubes abd graphene”, Proc. of the CAS 13-15 October 2008

813. V. Litovchenko, A. Grigoriev, A. Evtukh, H. Hartnagel, D. Pavlidis, and O. Yilmazoglu, “Theory of electron field emission from nanostructured surface of two-valley wide bandgap semiconductors”, Poster presented at German-Ukrainian Symposium “Nano-physics and Nanotechnology 2008”, Essen (20-26.9.2008)

814. A. Evtukh, V. Litovchenko, N. Semenenko, O. Kyriienko, O. Yilmazoglu, D. Pavlidis, and H. Hartnagel, “Peculiarities of electron field and photofield emis-sion from GaN and AlGaN”, Poster presented at German-Ukrainian Symposium “Nano-physics and Nanotechnology 2008”, Essen (20-26 Sept. 2008)

815. Ruf et al “Measurement approach: Planar single-substrate split-block circuitry for frequency multiplication” Proc. of the IMS 2008, Atlanta, USA (2008)

816. O. Yilmazoglu, D. Pavlidis, H.L. Hartnagel, V. Lito-

vchenko, A. Evtukh, A. Grygoriev, and N. Semenenko “New Experimental Method for the Study of Energy Con-tours in Momentum Space of NANO-Structured Semiconduc-tors with large Band Gaps using photo-assisted Field Emission of Electrons”, IEEE Nanotechnology Materials and Devices Conference 2008 (IEEE-NMDC2008), Kyoto (October 2008)

817. Goebel, T.; Schoenherr, D.; Feiginov, M.; Meissner, P. & Hartnagel, H. “THz grating sensors for investigation of thin dielec-tric layers Lasers and Electro-Optics” Proceedings of the International Quantum Electronics Conference CLEOE-IQEC (2007) 1-1

818. Göbel, T.; Schoenherr, D.; Sydlo, C.; Roggenbuck, A.; Deninger, A.; Meißner, P. & Hartnagel, H. “Tunable Fabry-Pirot THz filter with sub-wavelength grating mirrors” SPIE Photonics Europe (2008)

819. V. Litovchenko, A. Grygoriev, A. Evtukh, H. Hartnagel, D. Pavlidis, O. Yilmazoglu, “Electron field emission from two-valley wide bandgap semiconductors with nanostructured surface”, Proceedings of the 21st International Vacuum Nanoelec-tronic Conference, Wroclaw, Poland (13-17 July 2008)

820. A. Evtukh, V. Litovchenko, N. Semenenko, O. Kyriienko, O. Yilmazoglu, D. Pavlidis, H.L. Hartnagel, “Electron field and photofield emission from GaN and AlGaN”, Proceedings of the 21st International Vacuum Nanoelec-tronic Conference, Wroclaw, Poland (13-17 July 2008)

821. M. Ruf, J. Schür, B. Nicolae, L.-P. Schmidt and H.L. Hartnagel, „Validation of a fixed tunded planar tripler design op-timized for sub-mm wave generation with HBCS devices“, Proceedings of the European Microwave Association (Eu-Ma) Vol. 4, Issue 5 (Dec. 2008)46-51

822. J. Sigmund, F. Lampin, V. Ivannikov, C. SYdlo, M. Feiginov, D. Pavlidis, P. Meissner, H.L. Hartnagel, “Continuous.wave THz system with electro-optical THz-phase control”, Electron. Letters 44 (2008) 839-845

2009

823. T. Göbel, D. Schönherr, C. Sydlo, M. Feiginov, P. Meissner and H.L. Hartnagel, „Single-sampling-point coherent detection in continu-ous-wave photomixing terahertz systems“ Electronics Letters 45, No. 1 (1 January 1009)65-66

824. S. Hargreaves, L.J. Bignell, R.A. Lewis, J. Sigmund and H.L. Hartnagel, "New modes of THz generation by low-temperature-grown GaAsSb", Solid State Electronics 53 (2009)160-165

825. E. Monaico, P. Tighineanu, S. Langa, H.L. Hartnagel, I. Tiginyanu, „ZnSe-based conductive nanotemplates for nanofabrica-tion”, Phys. Status Solidi RRL 3, No. 4 (2009) 97-99

826. D. Schönherr, C. Sydlo, O. Cojocari, T. Göbel, H.L.Hartnagel, and P. Meissner, „Detection of Thermal Radiation at THz Frequencies“, Proc. of the 33rd WOCSDICE 2009, Málaga, Spain (17-20 May, 2009) 31-32

827. I. Oprea, H.L. Hartnagel, D.S. Ong, “First Experimental Confirmation of Ballistic Electron Wave Swing (BEWAS)”, Proc. of the 33rd WOCSDICE 2009, Málaga, Spain (17-20 May, 2009) 17-19

828. O. Yilmazoglu, J.P. Biethan, D. Pavlidis, H.L. Hartna-gel, A. Evtukh, V. Litovchenko, M. Semenenko, “Evidence of Satellite Valley Position in ZnO by Field Emission Spectroscopy”, Proc. of the 33rd WOCSDICE 2009, Málaga, Spain (17-20 May, 2009) 16-18

829. H. Hartnagel, D.S. Ong, I. Oprea, “Ballisitc Electron Wave Swing (BEWAS) to generate THz-singalpower” Frequenz 63 (March/April.2009)60-62

830. V. Litovchenko, A. Grygoriev, A. Evtukh, O. Yil-mazoglu, H.L. Hartnagel and D. Pavlidis, “Electron field emission from wide bandgap semiconduc-tors under intervalley carrier redistribution” Journal of Applied Physics 106, 104511 (2009)

831. Göbel, T. Schoenherr, D.; Sydlo, C.; Feiginov, M.;

Meissner, P.; Hartnagel, H.L., "Continuous-wave single-sampling-point characterisation of optoelectronic on-chip terahertz transceiver," Electronics Letters 45, no.23, 1171-1172 (November 2009)

832. Gobel, T.; Schoenherr, D.; Sydlo, C.; Feiginov, M.; Meissner, P.; Hartnagel, H.L., "Fiber-coupled on-chip THz transceiver," Infrared, Millimeter, and Terahertz Wave”, Proceedings of the 34th International Conference IRMMW-THz 2009, pp.1-2 (21-25 Sept. 2009)

2010 833. M. Semenenko, A. Evtukh, O. Yolmazoglu, H.L. Hartna-

gel, and D. Pavlidis, „A novel method to form conducting channels in SiOx(Si) films for field emission application“, Journal of Applied Physics 107, 013702 (2010)

834. A. Chakraborty, D. Kissinger, B. Laemmle, H.L. Hartna-gel and R. Weigl, “Design of Gain Optimized Broadband Low Noise Amplifi-ers at 120 GHz using SiGe Technology”, Proceedings of the GeMIC 2010, Berlin (15-17.3.2010)

835. L. Oprea, A. Walbr, O. Cojocari, H. Gibson, R. Zimmermann, and H.L. Hartnagel, “183 GHz Mixer on InGaAs Schottky Diodes”, Proceedings of the 21st Int. Symposium on Space THz Technology, Oxford (23-25 March 2010)

836. H.L. Hartnagel, D. Schönherr, N.H. Osman, C. Free, „A Contribution to Data Security: A Matrix of Metal Squares Identifyable by THz Waves“, Proceedings of the WOCSDICE 2010, Seeheim, 16-19.5.2010

837. I Oprea, O. Cojocari, A. Walber, H. Gibson, R. Zimmer-mann and H.L. Hartnagel, “A 183 GHz Mixer withlow LO power requirements using InGaAs Schottky Diodes”, Proceedings of the WOCSDICE 2010, Seeheim, 16-19.5.2010

838. D. Schönherr, H.L. Hartnagel, “Passive Intermodulation in Multicarrier Case“, Proceedings of the WOCSDICE 2010, Seeheim, 16-19.5.2010

839. D. Dragoman, M. Dragoman and H. Hartnagel, “Terahertz Generation Based on an Optically Pumped Balistic Electron Wave Swing Device”, Journal of Applied Physics 108, 026103 (2010)

840. H.L. Hartnagel, D. Schönherr, N.H. Osman, C. Free, „Optically Hidden, Secured Data of Matrix of Metal Squares by THz Wave Interaction", Frequenz 64 (2010) 5-6

841. H.L. Hartnagel, M. Dragoman, “Heterostructure Field Emitter of Electrons to Generate THz Signals by Laser Pulses Proc. of the IVNC 2010, July 26-30, Palo Alto, CA, USA

842. T. Goebel, D. Schoenherr, C. Sydlo, M. Feiginov, P. Meissner und H.L. Hartnagel, „Phase stability considertions in coherent CW THz photomixing systems“ Proc. 35th Int. Infrared Millimewter ans Terahertz Waves (IRMMW-TH) Conf. 2010, DOI:10.1109/ICIMW.2010.5612453

843. D. Schoenherr,C. Bleasdale, T. Goebel, C. Sydlo, H.L. Hartnagel, R. Lewis und P. Meissner, “Extremely broadband characterization of a Schottky diode based THz detector“ Proc. 35th Int. Infrared Millimeter and Terhartz Waves (IRMMW-THz) Conf.2010

2011 844. A.Ioisher, E. Badinter, E. Monaico, V. Postolache,

H.L. H. Hartnagel, N. Leporda, and I. Tiginyanu, “Integration of Ge Nanowire Arrays in Glass Micro-Fibers”, Surface Engineering and Applied Electrochemistry, 2011, Vol. 47, No. 2, pp.103-106

845. D. Dragoman, M. Dragoman, H.L. Hartnagel, “Terahertz generation using a resonant-tunneling-like configuration in grapheme”,

Journal of Applied Physics 109, 124307-pp.1-5, 2011 846. I. Oprea, O. Cojocari, H.L. Hartnagel,

“Analysis of Thermal Dissipation for mm-Wave Frequency Multipliers using GaAs Schottky Diodes”, Proceedings of the 35th Workshop on Compound Semiconduc-tor Devices and Integrated Circuits, WOCSDICE 2011, pp. 9-10

847. D. Schönherr, C. Sydlo, H.L. Hartnagel, P. Meißner

“Electro-Optic Detection of Continous Wave THz Radia-tion”, Proceedings of the 35th Workshop on Compound Semiconduc-tor Devices and Integrated Circuits, WOCSDICE 2011, pp. 35-36

848. H.L. Hartnagel,

“Microwave Circuits affected by Passive Inter-Modulation in Communication Satellites”, Proceedings of the 35th Workshop on Compound Semiconduc-tor Devices and Integrated Circuits, WOCSDICE 2011, p.37

849. H.L. Hartnagel, “Challenges of Nanometric Technology and Quantum Elec-tronics for Sciences and Engineering”, Introductery Paper of Plenary Session of ICNBME-2011, Program Booklet, p.9

850. H.L. Hartnagel,

“Ballistic Charge Carrier Devices for Terahertz Signal Generation”, Proceedings of ICNBME-2011, German-Moldavian Workshop 2011, p.24

851. A. Evthuk, V. Litovchenko, V. Ievtukh, O. Yilmazoglu, H.L. Hartnagel, D. Pavlidis, “Low-energy photon-assisted field emission from GaN surfaces”, Technical Digest, 24th INVC 2011, p.64-65

852. M. Semenenko, A. Evthuk, O. Steblova, V. Litovchenko, O. Yilmazoglu, H.L. Hartnagel, D. Pavlidis, “Generation of low-aberration beams of electrons based on nanosized Si-sponge field emission cathodes”, Technical Digest, 24th INVC 2011, p.166-167 J.-P.

853. O. Yilmazoglu, L. Considine, D. Pavlidis, H.L. Hartna-gel, R. Joshi, J.J. Schneider, H. Mimura, ÄA. Evthuk, M. Semenenko, V. Litovchenko, “Resonant electron-emission from a flat surface AIN/GaN system with carbon nanotube gate electrode”, Technical Digest, 24th INVC 2011, p. 216-217

854. H.W.P. Koops, A. Al-Mudhafar, H.L. Hartnagel, “Miniaturized THz source with free electron beams”, Technical Digest INVC 2011, p.236-237, O10-3. 24th In-ternational Vacuum Nanoelectronics Conference 2011-07-18 Wuppertal, Germany

855. M. Semenenko, O. Yilmazoglu, H.L. Hartnagel, D. Pavlidis “Determination of Satellite valley position in GaN emitter from photoexcited field emission investiga-tions” Journal of Applied Physics 109, 2011, 023703 (1-4)

856. A. Al Muddhafar, H.L. Hartnagel “Passive Intermodulation Effects on Bit Error Rates in Communications Satellites” German Academic Exchange Service, Oct. 2011

2012

857. J. Montero-de-Paz, D. Schönherr, E. Ugarte-Muñoz, I. Oprea, L.E. Garcia-Muñoz, A. Amrhein, D. Segovia-Vargas, O. Cojocari, H.L. Hartnagel, “Millimeter-Wave Receiver based on a Folded Dipole An-tenna and Schottky Diode for Maximum Power Transfer”, Tagung EUCAP 2012

858. J.-P. Biethana*,V.P. Sirkelib,c, L. Considinea, D.D. Nedeoglob, D. Pavlidisa,H.L. Hartnagela,d “Photoluminescene study of ZnO nanaostructures grown on silicon by MOCVD” Materials Science and Engineering B, Article in Press, GModel, MSB-13069; No. of Pages 6, 03/2012

859. H.L. Hartnagel, “The New Age: After Microelectronics now Nanoelectron-ics”, Invited Plenary Paper of 22nd International Conference “Radioelectronika 2012”, 17./18. April 2012, Brno, Czech Republik, Proseedings p. 3-6. (IEEE Cat.Nr.: CFP 1285B-PRT, ISBN:978-80-214-4468-3)

860. A. Al Mudhafar, H.L. Hartnagel, “Bit Error Probability in the Presence of Passive In-termodulation”, IEEE Communicationsa Letters, 05/2012, No. of Pages 4

861. H.W.P. Koops, S. Al –Daffaie, H.L. Hartnagel, A. Rudzinski, “Development of a Miniaturized Dynatron THz-Oscillator with a FEBIP System”, Proceedings of “IVNC 2012”, Technical Digest 25th Inter-national Vacuum Nanoelectronics Conference, July 9-13, 2012, Jeju Island, Korea, p. 70

862. H.W.P. Koops, S. Al –Daffaie, H.L. Hartnagel, “Portable Source with Free Electron Beams for 0.1 to 10

THZ”, Proceedings of “WOCSDICE-EXMATEC 2012”, May 2012, Is-land of Porquerolles, France

863. S. Al-Daffaie, P. Acedo, H.L. Hartnagel, “Simulation of a CW THz Camera Scheme”, Proceedings of “WOCSDICE-EXMATEC 2012”, May 2012, Is-land of Porquerolles, France

864. S. Al-Daffaie, O. Yilmazoglu, Franko Küppers, H.L. Hartnagel, “Nanogrid-based Vertically Integrated Photomixer for Continuous Wave Terahertz Generation”, 37th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug. 23-28 2012, Wol-logong, Australia

865. V.P. Sirkeli, D.D. Nedeoglo, N.D. Nedeoglo, I.V. Rade-vici, R.L. Sobolevskaia, K.D., Sushkevich, Erkki Lähderanta, Alexander V. Laskul, R. Lahio, J.-P. Bi-ethan, O. Yilmazoglu, D. Pavlidis, H.L. Hartnagel “Magnetic and luminescent properties of manganese-doped ZnSe crystals”, Physica B, Vol. 407, Issue 18, September 2012, p. 3802-3807

866. H.L. Hartnagel „Nanometric Concepts for Microwave and Terahertz Invited Paper at Congress NanoTR VIII (8th Nanoscience and Nanotechnology Congress,) 25.-29. June 2012 in An-kara, Turkey, p. 17 of Booklet, 25.06.2012

867. O. Yilmazoglu, S. Al-Daffaie, H.L. Hartnagel „CNT photocathodes based on GaAs high-frequency pho-toswitches“ Accepted at 25th International Vacuum Nanoelectronics Conference (IVNC 2012), Jeju, South Korea, 2012

868. A.Evtukh, O. Yilmazoglu, V. Litovchenko, V. Levtukh, H.L. Hartnagel et al. “GaN surface electron field emission efficiency en-hancement by low-energy photon illumination” Journal of Vacuum Science and Technology B 30 (2), Mar/Apr 2012, 022206 (1-5)

869. O. Yilmazoglu, L. Considine, R. Joshi, H. Mimura, D.

Pavlidis et al. “Monochromatic electron-emission from planar AIN/GaN multilayers with carbon nanotube gate electrode” Journal of Vacuum Science and Technology B 30 (4), Jul/Aug 2012, 042203 (1-6)

870. H.W.P. Koops, S. Al-Daffaie, H.L. Hartnagel, A. Rudzinski

“Portable 0.1 to 10 THz Radiation Source with Free Electron Beams” 3rd ITG Int. Vacuum Electronics Workshop, Aug. 2012, Bad Honnef, Germany

871. H.L. Hartnagel,

“New Terahertz security opportunities based on Nanomet-ric Technology”, The NATO Science for Peace and Security Programme, Ad-vanced Research Workshop, Yerevan, Armenia, Sept. 29 – Oct. 01, 2012

2013

872. J.-P. Biethan, V.P. Sirkeli, L. Considine, D.D. Nedeoglo, D. Pavlidis,H.L. Hartnagel “Near-band-edge lumiescene of ZnO nanostructures grown by MCVD”, 2nd International Conference on Nanotechnologies and Bi-omedical Engineering (ICNBME-2013), German-Moldavan Workshop for Electronic, Photonic and Biomedical Aplications, Chişinău, Republik of Moldava, April 18-20, 2013

873. H.L. Hartnagel

“Nano-Electrons with Particular Reference to Medical Applications”, 2nd International Conference on Nanotechnologies and Bi-omedical Engineering (ICNBME-2913), German-Moldavan Workshop for Electronic, Photonic and Biomedical Aplications,Chişinău, Republik of Moldava, April 18-20, 2013

874. H.L. Hartnagel

“Terahertz-Electronics with particular reference to se-curity applications”, 2nd International Conference on Nanotechnologies and Bi-omedical Engeineering (ICNBME-2913), German-Moldavan Workshop for Electronic, Photonic and Biomedical Aplications,Chişinău, Republik of Moldova, April 18-20, 2013

875. H.L. Hartnagel, D.S. Ong, S. Al-Daffaie,

“Proposal of a THz Signal Generator by ballistic elec-tronresonance device based on graphene”, WOCSDICE 2013, Warnemünde, Germany, May 26-29, 2013

876. K. Pitra, P. Kovacs, Z. Raida, H.L. Hartnagel,

„Design of circularly polarized terahertz antenna with superstrate (cover) layer“, International Conference on Electromagnetics in Ad-vanced Applications (ICEAA ’13), Torino, Italien, Sept. 9-13, 2013

877. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers,

H.L. Hartnagel, „Graphene LTG-FaAs Photomixer for Reliable Continous Wave Terahertz Genertion“, 38th International Conference on Infrared, Terahertz and Millimeter Waves, Mainz, Germany, Sept. 2013

2014

878. H.L. Hartnagel, S. Preu, „Graphene THz Circuitry by Nano-Constriction Designs”, WOCDICE/EXMATEC 2014, Workshop, Delphi, Greece, June 15 - 20th, 2014

879. Shihab Al-Daffaie, Hans Hartnagel, Franko Küppers, Ok-tay Yilmazoglu, „Photomixer for continous wave terahertz generation” Ref.No.: EP2685308A1, TransMIT GmbH, Kerkrader Strasse 3, 35394 Gießen (DE), Jan. 2014

880. A. Al-Mudhafart, J.Puech, C. Miquel-Espanya, D. Rabo-

so, H. Hartnagel, „EVEREST Simulation Campaign Results on Multipactor Ef-fect Using CST Particle Studio”, EuCAP, Den Haag, Niederlande, April 6-11, 2014

881. Oktay Yilmazoglu, Shihab Al-Daffaie, Franko Küppers, Hans Hartnagel, Y. neo, H. Minura, „Photocathodes based on graphene nanoplatelet emitters on semi-insulating GaAs photoswitch” 27th International Vacuum Nanoelectronics Conference, Engelberg, Switzerland, Juli 2014

882. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers

and Hans Hartnagel, „Single Nanowire Photomixer for Reliable and High Fre-quency Continous Wave Terahertz Generation” 39th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) 2014, Tuscon Arizona, USA 09/2014

883. Vadim Sirkeli, Oktay Yilmazoglu, Franko Küppers, H.L. Hartnagel, „Effect of p-NiO interlayer on efficiency of p-GaN/n-ZnO LED devices“, Proceeding of the 8th International Conference on Micro-electronics and Computer Science, Chişinău, Republik of Moldava, October 22-25,2014, pp.78-81

884. Oktay Yilmazoglu, Anatoli Evtukh, Shihab Al-Daffaie, Jens-Peter Biethan, Dimitris Pavlidis Vladimir Lotovchenko, Hans Hartnagel, „Electron field emission from nanostructured semicon-ductors under photo illumination“ Turkish Journal of Physics 11/2014, 38(3), S. 543-562

885. Hans Hartnagel, „New THz Opportunities based on Graphene” PERFIK 2014: National Physics Conference 2014, Kuala Lumpur, Malaysia, November 18-19, 2014

886. I. Oprea, H.J. Gibson, O. Cojocari, A. Walber, T. Narhi, H.L. Hartnagel, „440 GHz Frequency Doubler using Schottky Diode based Integrated Circuits“, Micro- and Millimeter Wave Technology and Techniques Workshop 2014, November 25-27, 2014, ESA-ESTEC, Noord-wijk, Netherlands

2015

887. Duu Sheng Ong and Hans L. Hartnagel, „THz radiation by quasi-ballistic electron reflection in AISb/InAs/AISb hetereostructures” A Letters Hournal Exploring the _Frontiers of Physics, EPL, 109 (2015) 38004

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