shihabaldaffaie

Shihab Al-Daffaie

Associate Professor of the Practice, Terahertz-Nanophotonics and Integration Technology (TNIT)
Center for Photonics and Quantum Materials

Office No. E-A5 2025 / Office phone: +7 (495) 280-14-81  ext. 3540 / E-mail: 

Shihab Al-Daffaie, Senior Member of the IEEE Terahertz Science and Technology section, Member OSA, SPIE, and European Microwave Association (EuMA), was with Nortel Networks Corporation as a project leader and specialized in so called all-optical network until end 2009.

In 2010, he awarded a Scholarship from Deutscher Akademischer Austauschdienst (DAAD) to join the Department of Electrical Engineering and Information Technology, Technical University Darmstadt, Darmstadt, Germany, where he received the Doctoral degree (Dr.-Ing.) in 2015 and continued afterwards as a Postdoc.

In 2016, he founded and led the Nanophotonics and Terahertz Technology group (NTT) in faculty of Photonics and Optical Communications, Institute for Microwave Engineering and Photonics, TU Darmstadt in Germany.

In 2019, he awarded Ernst Ludwig Mobility Grant and joined the team of Terahertz Photonic Systems in the Electrical Engineering Faculty and the Institute for Photonics Integration at TU/e, Netherlands. He has participated in several German and European research framework projects in terahertz and nanophotonic technologies and their applications. His research is interested to use the nano -photonic, -material, and -technology in the field of terahertz devices, and system. The research level starts from theory, device design, fabrication, characterization, optimization, and ends to system integration. The recent research presented new types of terahertz nanodevices based on nanoelectrodes (nanowires and graphene) which significantly enhance the terahertz output power and the operation frequency.

Currently, he is working on the first THz- photonic integrated circuits (PIC) process design kit (PDK), aiming to integrate all lasers and photonic devices (active and passive) with THz nanodevices in one single chip. Main applications of those THz-PIC chips are in communications including 6G and beyond, Bio-medical including viruses’ detection, security and safety including explosive detection and body search scanners, industrial inspections including quality degradation, and much more.

He published more than 55 scientific articles and he is a Guest Editor of the MDPI Special Issue on New Progress in Infrared, Millimeter and Terahertz Waves. He is with the Skolkovo Institute of Science and Technology, Moscow, Russia, as an Associate Professor of the Center for Photonics and Quantum Materials.

My main research interests are photonic, semiconductor- and nanophotonics based THz sources and detectors as well as applications mainly in communications, Bio-medical, and sensing. In terms of THz sources, I am developing photomixers for continuous-wave applications and photoconductors enhanced with metallic nanostructures for THz generation as well as THz detection. I am interested in a wide range of applications, particularly novel photonic concepts, THz communication systems, interaction of THz radiation with matter, novel materials for THz sources and detectors, THz-Medicine systems, III-V semiconductor physics and nanomaterial (nanowire, graphene, and CNT) based THz electronics. I am recently  reorienting my research line towards system-level technology and applications of THz radiations in both applied and industrial research. Where currently, I am working on the first THz- photonic integrated circuits (PIC) process design kit (PDK), aiming to integrate all lasers and photonic devices (active and passive) with THz nanodevices in one single chip. Main applications of those THz-PIC chips are in communications including 6G/7G, Bio-medical including viruses’ detection, security and safety including explosive detection and body search scanners, industrial inspections including quality degradation, and much more.

Selected Publications

  1. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, Hans L. Hartnagel: 1-D and 2-D Nanocontacts for Reliable and Efficient Terahertz Photomixers. IEEE Transactions on Terahertz Science and Technology 05/2015; Volume 5 (Issue 3): 398-405., DOI:10.1109/TTHZ.2015.2399772
  2. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, H. L. Hartnagel: INVITED: Nanogrid-based Vertically Integrated Photomixer for Continuous Wave Terahertz Generation. 37th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012, Wollongong, NSW, Australia; 09/2012, DOI:10.1109/IRMMW-THz.2012.6380396
  3. Wiecha, Matthias M., Shihab Al-Daffaie, Andrey Bogdanov, Mark D. Thomson, Oktay Yilmazoglu, Franko Küppers, Amin Soltani, and Hartmut G. Roskos. “Direct Near-Field Observation of Surface Plasmon Polaritons on Silver Nanowires.” ACS omega (2019).
  4. Alaa Jumaah, Shihab Al-Daffaie, Oktay Yilmazoglu, Thomas Kusserow. “Continuous-Wave Terahertz Emitter with HybridNanoelectrodes Based on Graphene and Nanowire.” OSA Continuum. 10.1364/OSAC.392837 (2020)
  • Publications in peer-reviewed journals
  1. Alaa Jumaah, Shihab Al-Daffaie, Oktay Yilmazoglu, Thomas Kusserow. “Continuous-Wave Terahertz Emitter with HybridNanoelectrodes Based on Graphene and Nanowire.” OSA Continuum. 10.1364/OSAC.392837 (2020)
  2. Wiecha, Matthias M., Shihab Al-Daffaie, Andrey Bogdanov, Mark D. Thomson, Oktay Yilmazoglu, Franko Küppers, Amin Soltani, and Hartmut G. Roskos. “Direct Near-Field Observation of Surface Plasmon Polaritons on Silver Nanowires.” ACS omega (2019).
  3. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, Hans L. Hartnagel: 1-D and 2-D Nanocontacts for Reliable and Efficient Terahertz Photomixers. IEEE Transactions on Terahertz Science and Technology 05/2015; Volume 5 (Issue 3):398-405., DOI:10.1109/TTHZ.2015.2399772
  4. Vadim P Sirkeli, Oktay Yilmazoglu, Shihab Al-Daffaie, Ion Oprea, Duu Sheng Ong, Franko Kueppers, Hans L Hartnagel: Efficiency enhancement of InGaN/GaN light-emitting diodes with pin-doped GaN quantum barrier. Journal of Physics D Applied Physics 01/2017; 50(3):035108., DOI:10.1088/1361-6463/50/3/035108
  5. Hartnagel, S. Al-Daffaie, O. Yilmazoglu: Plasmonics in semiconductors and in Ag submicron wires and graphene. Lithuanian Journal of Physics 01/2016; 55(4)., DOI:10.3952/physics.v55i4.3225
  6. Oktay Yilmazoglu, Anatoli Evtukh, Shihab Al-Daffaie, Jens-Peter Biethan, Dimitris Pavlidis, Vladimir Litovchenko, Hans L Hartnagel: Electron field emission from nanostructured semiconductors under photo illumination. Turkish Journal of Physics 11/2014; 38(3):543-562., DOI:10.3906/fiz-1407-1
  • Specialist books
  1. Shihab Al-Daffaie: Nanoelectrode Based Photomixer for Continuous Wave Terahertz Generation. 1. Edition, 09/2015; Sierke VERLAG., ISBN: 978-3-86844-747-7 (PhD Thesis)
  2. Shihab Al-Daffaie, Hans Hartnagel: Plasmonic Effects for Enhanced Optical Mixing in View of THz Signal Generation. 3rd International Conference on Nanotechnologies and Biomedical Engineering, 01/2016; DOI:10.1007/978-981-287-736-9_46.
  • Conference proceedings

       2019 – 2020

  1. Alaa Jumaah, Shihab Al-Daffaie, Thomas Kusserow, and Idelfonso Tafur Monroy “Highly Transparent Graphene Electrodes For CW THz Applications”, 45th IRMMW-THz 2020 Conference in Buffalo, NY November , 2020
  2. Alaa Jumaah, Shihab Al-Daffaie, Thomas Kusserow, and Idelfonso Tafur Monroy “High Performance Graphene-Based CW THz Photoconductive Detector”, 45th IRMMW-THz 2020 Conference in Buffalo, NY November , 2020
  3. Shihab Al-Daffaie, [INVITED] “Nanodevices for Terahertz Communication Systems “, Springer-4th international conference New Trends in Information and Communications Technology Applications (NTICT’19), Baghdad, Iraq; 12/2019: http://www.uoitc.edu.iq/ntict2019/
  4. Shihab Al-Daffaie, Oktay Yilmazoglu, Matthias M. Wiecha, Amin Soltani, Franko Küppers, Thomas Kusserow, and Hartmut G. Roskos “Sliver Nanowire Surface Plasmon Polaritons Enhancement in Terahertz Nanodevices”, IRMMW-THz 2019, Sept. 2019, Paris, France.
  5. Shihab Al-Daffaie, [INVITED Seminar] “Nanodevices for Terahertz Communication Systems”, Skootch, Moscow, Russia; 25th April, 2019: https://crei.skoltech.ru/cpqm/2019/04/23/nanodevices-for-terahertz-communication-systems
  6. Shihab Al-Daffaie, Matthias M. Wiecha, Oktay Yilmazoglu, Amin Soltani, Thomas Kusserow, and Hartmut G. Roskos “Sliver nanowire plasmonic enhancement in nanoelectrodes terahertz photomixer.” French-German THz Conference FGTC, Kaiserslautern, Germany 04/2019.
  7. Shihab Al-Daffaie: [INVITED Seminar] “Nanoelectrode Based Terahertz Devices in Communication Systems”, Jointly Hosted by the Department of Computer Eng. and Department of Electronics and Communications Eng. Al-Nahrain University, Iraq.; 01/2019.
  8. Alaa Jumaah, Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, and Thomas Kusserow “Interdigital Multilayer-Graphene Nanoelectrodes for Continuous Wave Terahertz photomixers”, EuMCE, May 2019, Prague Czech.
  9. Verónica Laín Rubio, Shihab Al-Daffaie, Alaa Jumaah, and Thomas Kusserow “Design and Implementation of a Terahertz Integrated Lens-Antenna for a Nanocontacts Based Photomixer”, IRMMW-THz 2019, Sept. 2019, Paris, France.
  10. Alaa Jumaah, Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, and Thomas Kusserow “Experimental Investigation of Graphene Layers as 2D Nanoelectrode for Continuous Wave Terahertz Generation”, IRMMW-THz 2019, Sept. 2019, Paris, France.
  11. Matthias M. Wiecha, Shihab Al-Daffaie, et al. “Surface Plasmon Polariton modes on silver nanowires.” French-German THz Conference FGTC, Kaiserslautern, Germany 04/2019.
  12. Dominika Warmowska, Alaa Jumaah, Shihab Al-Daffaie, Oktay Yilmazoglu, and Zbynek Raida “Manufacture of high-gain, circularly polarized terahertz antenna array in silicon technology”, 8th Asia-Pacific Conference on Antennas and Propagation (APCAP), August. 2019, Incheon, Korea.

       2012 – 2018

  1. Shihab Al-Daffaie, Oktay Yilmazoglu, and Franko Küppers: [INVITED] “Nanoelectrode Based Terahertz Devices”. EMN Meeting on Terahertz & Collaborative Conference on Nonlinear Optics, Amsterdam, Netherland; 04/2018.
  2. Shihab Al-Daffaie, Oktay Yilmazoglu, Alaa Jabbar Jumaah Zangana, Franko Kueppers: First Demonstration of Continuous Wave Terahertz Radiation From Semi-Insulating GaAs Photomixer with Nanowire. 2018 43rd IRMMW-THz , Nagoya, Japan; 09/2018, DOI:10.1109/IRMMW-THz.2018.8510294
  3. Shihab Al-Daffaie: [INVITED Seminar] “Terahertz Nano-Photonic Semiconductor Devices”. Terahertz Technologies and Applications, Computer Engineering- Al-Nahrain University, Iraq.; 03/2017.
  4. Shihab Al-Daffaie: [INVITED Seminar] “Terahertz systems and applications”. Terahertz systems and applications, Department of Networks Engineering in the College of Information Engineering- Al-Nahrain University, Iraq; 11/2016.
  5. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, Hans Hartnagel: “Fully Integrated Vertical Nanocontact Photomixer for Continuous-Wave Terahertz Generation”. Infrared, Millimeter, and Terahertz waves (IRMMW-THz) 2015, Hong Kong, China; 08/2015, DOI:10.1109/IRMMW-THz.2015.7327568
  6. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, Hans Hartnagel: “Single Nanowire Photomixer for Reliable and High Frequency Continuous Wave Terahertz Generation”. 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014, Tucson, Arizona USA; 09/2014, DOI:10.1109/IRMMW-THz.2014.6955997
  7. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, H. L. Hartnagel: “Graphene LTG-GaAs Photomixer for Reliable Continuous Wave Terahertz Generation”. 38th International Conference on Infrared, Terahertz and Millimeter Waves, Mainz, Germany 2013; 09/2013, DOI:10.1109/IRMMW-THz.2013.6665737
  8. Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers, H. L. Hartnagel, [INVITED]: “Nanogrid-based Vertically Integrated Photomixer for Continuous Wave Terahertz Generation”. 37th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012, Wollongong, NSW, Australia; 09/2012, DOI:10.1109/IRMMW-THz.2012.6380396
  9. Shihab Al-Daffaie, P. Acedo, H. Hartnagel, [INVITED] “Simulation of a CW THz Camera Scheme”. WOCSDICE, on Porquerolles Island, France 2012; 05/2012
  10. Alaa Jabbar Jumaah Zangana, Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Kueppers: “Graphene Enhanced 2-D Nanoelectrode for Continuous Wave Terahertz Photomixers”. 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, Japan; 09/2018, DOI:10.1109/IRMMW-THz.2018.8510179
  11. Yilmazoglu, S. Al-Daffaie, F. Kuppers, Y. Neo, H. Mimura: “High-frequency photocathode based on CNT-yarn emitter and GaAs photoswitch”. 31st International Vacuum Nanoelectronics Conference (IVNC); 07/2018, DOI:10.1109/IVNC.2018.8520134
  12. Franko Kueppers, Vadim P Sirkeli, Oktay Yilmazoglu, Shihab Al-Daffaie, Ion Oprea, Duu Sheng Ong, Hans Hartnagel: “Internal Quantum Efficiency Enhancement of InGaN/GaN LEDs with Mg-Si Pin-Doped GaN Quantum Barrier”. 9th International Conference on Materials Science and Condensed Matter Physics (MSCMP 2018), Chisinau, Moldova; 09/2018.
  13. Alaa Jumaah, Shihab Al-Daffaie, Oktay Yilmazoglu, Franko Küppers: “Graphene-Nanowire Hybrid Photomixer for Continuous-Wave Terahertz Generation”. 42th IRMMW-THz 2017, Cancún, México; 08/2017, DOI:10.1109/IRMMW-THz.2017.8067085
  14. Vadim P. Sirkeli, Oktay Yilmazoglu, Shihab Al-Daffaie, Sascha Preu, Franko Küppers, Hans L. Hartnagel: “33 THz room-temperature quantum cascade lasers based on ZnMgSe/ZnSe”. 42nd IRMMW-THz 2017, Cancún, México; 08/2017, DOI:10.1109/IRMMW-THz.2017.8067056.
  15. Vadim P. Sirkeli, Oktay Yilmazoglu, Shihab Al-Daffaie, Ion Oprea, Duu Sheng Ong, Franko Küppers, Hans L. Hartnagel: “Resonant tunneling transport in Zn x Be 1-x Se/ZnSe/Zn y Be 1-y Se asymmetric quantum structures”. SPIE Microtechnologies; 05/2017, DOI:10.1117/12.2265367.
  16. Vadim P. Sirkeli, Oktay Yilmazoglu, Shihab Al Daffaie, Ion Oprea, Duu Sheng Ong, Franko Küppers, Hans Ludwig Hartnagel: “Resonant tunneling transport in ZnxBe1-xSe/ZnSe/ZnyBe1-ySe asymmetric quantum structures”. SPIE Microtechnologies Conference – Conference EMT104 – Nanotechnology VIII, Barcelona, Spain; 05/2017.
  17. Yilmazoglu, Shihab Al-Daffaie, F. Küppers, H. L.  Hartnagel: “New photocathodes for THz vacuum microelectronic devices”. Energy, Materials, Nanotechnology (EMN) Meeting on Vacuum Electronics, Las Vegas, NV, USA; 11/2016
  18. Ahid S. Hajo, Shihab Al-Daffaie, Oktay Yilmazoglu, Mohammad Tanvir Haidar, Franko Kueppers: “Zero-bias Schottky diode based THz detectors at room temperature using metallic nanowire”. 41st IRMMW-THz 2016, Copenhagen, Denmark; 09/2016, DOI:10.1109/IRMMW-THz.2016.7758892.
  19. Mohammad Tanvir Haidar, Shihab Al-Daffaie, Oktay Yilmazoglu, Ahid S. Hajo, Franko Kueppers: “CW THz photomixers at 850 nm and 1550 nm using dielectrophoretic alignment of Ag-nanowire”. 41st IRMMW-THz – 2016, Copenhagen, Denmark; 09/2016, DOI:10.1109/IRMMW-THz.2016.7758754.
  20. Vadim P Sirkeli, Oktay Yilmazoglu, Shihab Al-Daffaie, Ion Oprea, Duu Sheng Ong, Franko Kueppers, H.L. Hartnagel: “Effect of Si-Doping of the GaN Barrier on the Internal Quantum Efficiency of InGaN/GaN Light-Emitting Diodes”. 8th International Conference on Materials Science and Condensed Matter Physics / MSCMP-2016, Chisinau, Moldova; 09/2016, DOI:10.13140/RG.2.2.13277.61928.
  21. Yilmazoglu, Shihab Al-Daffaie, F Küppers, H L Hartnagel, Y Neo, H Mimura: “Ultrafast Photocathodes Based on n-doped Graphene Emitters on Compound Semiconductor Photoswitches”. The 28th International Vacuum Nanoelectronics, Guangzhou, Guangdong Province, China; 07/2015, DOI:10.1109/IVNC.2015.7225573.
  22. H L Hartnagel, Shihab Al-Daffaie, O Yilmazoglu: “Plasmonics and Graphene for THz Generation by Optical Mixing”. The 4th Russia-Japan-USA Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies, IMT, ISSP, Chernogolovka, Russia; 06/2015
  23. H Hartnagel, Shihab Al-Daffaie: “Graphene Plasmonics for the Enhancement of THz-Signal Transfer”. The 39th European Workshop on Compound Semiconductor Devices and Integrated Circuits, Smolenice Castle, House of Scientists of Slovak Academy of Sciences.; 06/2015
  24. Oktay Yilmazoglu, Shihab Al-Daffaie, Franko Küppers, Hans Hartnagel, Y. Neo, H. Mimura: “Photocathodes based on graphene nanoplatelet emitters on semi-insulating GaAs photoswitch”. 27th International Vacuum Nanoelectronics Conference, Engelberg, Switzerland; 07/2014, DOI:10.13140/2.1.3231.1043
  25. L. Hartnagel, D.S. Ong, Shihab Al-Daffaie: “Proposal of a THz Signal Generator by ballistic electronresonance device based on graphene”. WOCSDICE 2013, Warnemümde, Germany, 2013; 05/2013
  26. W.P. Koops, Axel Rudzinski, Frank Nouvertné, Shihab Al-Daffaie, H. L. Hartnagel: Portable 0.1 To 10 THz Radiation Source With Free Electron Beams. 3rd ITG Int. Vacuum Electronics Workshop Physikzentrum Bad Honnef , Germany 2012; 08/2012
  27. W.P. Koops, Shihab Al-Daffaie, Axel Rudzinski, Hans L. Hartnagel: “Development of a Miniaturized Dynatron THz-Oscillator with a FEBIP System”. 25th International Vacuum Nanoelectronics Conference Jeju, Korea, 2012; 07/2012, DOI:10.1109/IVNC.2012.6316863
  28. Oktay Yilmazoglu, Shihab Al-Daffaie, C. Nick, R. Joshi, S. Yadav, H. L. Hartnagel, J. J. Schneider, C. Thielemann: “CNT photocathodes based on GaAs high-frequency photoswitches”. 25th International Vacuum Nanoelectronics Conference (IVNC 2012); 07/2012, DOI:10.1109/IVNC.2012.6316840
  29. W.P. Koops, Shihab Al-Daffaie: “Fabrication of Field Emitter Tips by High-Field Induced Deposition” . Int. Workshop on Advanced Nanovision Science, Shizuoka University Japan, 2012; 07/2012
  30. W.P. Koops, Shihab Al-Daffaie, H. L. Hartnagel: “Portable Source with Free Electron Beams for 0.1 to 10 THz”. WOCSDICE , Porquerolles Island, France 2012; 05/2012