Terahertz Research Lab

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Terahertz Research Lab

Publications

Peer-Reviewed Publications
  1. Kashyap, B. G., P. C. Theofanopoulos, Y. Cui, and G. C. Trichopoulos. “Mitigating Quantization Lobes in MmWave Low-Bit Reconfigurable Reflective Surfaces.” IEEE Open Journal of Antennas and Propagation 1 (2020): 604–14.
  2. Theofanopoulos, P. C., and G. C. Trichopoulos. “Modeling and Analysis of Terahertz Graphene Switches for On-Wafer Coplanar Transmission Lines.” Journal of Infrared, Millimeter, and Terahertz Waves 41, no. 7 (July 2020): 758–75.
  3. Theofanopoulos, P. C., S. Ageno, Y. Guo, S. Kale, Q. Wang, and G. C. Trichopoulos. “High-Yield Fabrication Method for High-Frequency Graphene Devices Using Titanium Sacrificial Layers.” Journal of Vacuum Science & Technology B 37, no. 4 (July 2019).
  4. S. Rappaport, Y. Xing, O. Kanhere, S. Ju, A. Madanayake, S. Mandal, A. Alkhateeb, and G. C. Trichopoulos,” Wireless communications and applications above 100 GHz: Opportunities and challenges for 6g and beyond,” IEEE Access, 7, 78729–78757, (2019).
  5. Y. Cui and G. C. Trichopoulos, “A Quasi-Optical Testbed for Wideband THz On-Wafer Measurements,” in IEEE Transactions on Terahertz Science and Technology, vol. 9, no. 2, pp. 126-135, March 2019.
  6. P. C. Theofanopoulos, M. Sakr and G. C. Trichopoulos, “Multistatic Terahertz Imaging Using the Radon Transform,” in IEEE Transactions on Antennas and Propagation, vol. 67, no. 4, pp. 2700-2709, April 2019.
  7. P. C. Theofanopoulos and G. C. Trichopoulos, “Modeling of mmW and THz Imaging Systems Using Conjugate Field Coupling,” in IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 2, pp. 213-216, Feb. 2018.
  8. C. Caglayan, G. C. Trichopoulos, and K. Sertel, ”Hybrid Electromagnetic Modeling of Lens-Integrated Antennas for Non- Contact On-Wafer Characterization of THz Devices and Integrated Circuits,” Applied Computational Electromagnetics Society Journal, Jan 2018, Vol. 33 Issue 1, p107-110. 4p.
  9. P. C. Theofanopoulos, C. S. Lavranos, K. E. Zoiros, G. C. Trichopoulos, G. Granet and G. A. Kyriacou, “Investigation of Nonreciprocal Dispersion Phenomena in Anisotropic Periodic Structures Based on a Curvilinear FDFD Method,” in IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 1, pp. 36-49, Jan. 2017.
  10. Y. Karisan, C. Caglayan, G. C. Trichopoulos, and K. Sertel, “Lumped-Element Equivalent-Circuit Modeling of Millimeter-Wave HEMT Parasitics Through Full-Wave Electromagnetic Analysis,” in IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 5, pp. 1419-1430, May 2016.
  11.  G. C. Trichopoulos and K. Sertel, “Broadband terahertz computed tomography using a 5k-pixel real-time THz camera,” Journal of Infrared, Millimeter, and Terahertz Waves, Volume 36, Issue 7, pp 675-686, July 2015.
  12. C. Caglayan, G. C. Trichopoulos, and K. Sertel, “Non-contact probes for on-wafer characterization of sub-millimeter-wave devices and integrated circuits,” IEEE Trans. Microwave Theory Tech., vol. 62, no. 11, pp. 2791–2801, Nov 2014.
  13. G. C. Trichopoulos, H.L. Mosbacker, D. Burdette, and K. Sertel, “A broadband focal plane array camera for real-time THz imaging applications,” IEEE Trans. Antennas and Propagation, vol.61, no.4, pp.1733-1740, April 2013.
  14. K. Topalli, G. C. Trichopoulos, and K. Sertel, “An indirect impedance characterization method for monolithic THz antennas using coplanar probe measurements,” IEEE Antennas and Wireless Propagation Letters, vol.11, pp.3-5, 2012.
  15. G. C. Trichopoulos, G. Mumcu, K. Sertel, L. H. Mosbacker, and P. Smith, “A novel approach for improving off-axis pixel performance of terahertz focal plane arrays,” IEEE Trans. Microwave Theory Tech., vol. 58, no. 7, pp. 2014–2021, Mar. 2010.
  16. D. G. Drogoudis, G. C. Trichopoulos, G. A. Kyriacou, and J. N. Sahalos, “A modified perturbation method for three-dimensional time-harmonic impedance tomography,” PIERS Online, Vol. 1, No. 2, 151-155, 2005.
Book Chapters
  1. G. C. Trichopoulos and K. Sertel, “Terahertz Antennas and Arrays” in Antenna Engineering Handbook, Edited by J. L. Volakis, New York: McGraw-Hill, pg. 679-694, 2018.
  2. K. Sertel and G. C. Trichopoulos, “Non-contact Metrology for mm-Wave and THz Electronics”. In: Fay P., Jena D., Maki P. (eds) High-Frequency GaN Electronic Devices. Springer, Cham (2020).
Patents
  1. P. C. Trichopoulos, C. Caglayan, and K. Sertel, “On-chip, wideband, differentially fed antennas with integrated bias structures” (US 15/598,844)
  2. P. C. Trichopoulos, C. Caglayan, and K. Sertel, “Non-contact probe measurement test-bed for millimeter-wave (mmW) and terahertz (THz) circuits, integrated devices/components, systems and for spectroscopy using sub-wavelength-size samples” (US 14/309,432)
  3. G. C. Trichopoulos and P. Theofanopoulos, “Methods, apparatuses, and systems for radio-frequency imaging sensors for advanced fingerprint biometrics and medical imaging” (US 16/309,188)
  4. G.C. Trichopoulos and Ahmed Alkhateeb, “Simultaneous localization and mapping by merging imaging and wireless communications” (U.S. Provisional Application No. 62/767,820, filed November 15, 2018)
Conferences
  1. 1. Kashyap, B. G., P. C. Theofanopoulos, Y. Cui, and G. C. Trichopoulos*. “Fabrication and Characterization of a 900-Element 222.5 GHz Single-Bit Reflective Surface with Suppressed Quantization Lobes.” In 2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), 153–54, 2021.
  2. Theofanopoulos, P. C., and G. C. Trichopoulos*. “A Novel 2-Bit Graphene Reconfigurable Reflectarray.” In 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 1701–2, 2020.
  3. Rong, Y., P. C. Theofanopoulos, G. C. Trichopoulos*, and D. W. Bliss. “Cardiac Sensing Exploiting an Ultra-Wideband Terahertz Sensing System.” In 2020 IEEE International Radar Conference (RADAR), 1002–6, 2020.
  4. Cui, Y., M. K. Immadisetty, and G. C. Trichopoulos*. “Evaluating the Properties of Millimeter- and THz Wave Scattering from Common Rough Surfaces.” In 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 1117–18, 2020. https://doi.org/10.1109/IEEECONF35879.2020.9329367.
  5. Theofanopoulos, P. C., and G. C. Trichopoulos*. “Mitigating Quantization Lobes in Reconfigurable Reflective Surfaces.” In 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 1717–18, 2020.
  6. P. C. Theofanopoulos and G. C. Trichopoulos, “Modeling of Sub-Millimeter Wave Coplanar Waveguide Graphene Switches,” 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, GA, USA, 2019, pp. 1527-1528.
  7. Y. Cui and G. C. Trichopoulos, “A Quasi-optical Testbed for Terahertz On-Wafer Device and Circuit Characterization,” 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, GA, USA, 2019, pp. 1729-1730.
  8. Y. Cui and G. C. Trichopoulos, “Comparison of Propagation Losses in THz and Optical Non-Line-of-Sight Imaging,” 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, GA, USA, 2019, pp. 1473-1474.
  9. P. C. Theofanopoulos and G. C. Trichopoulos, “Toward Large-Scale Dynamically Reconfigurable Apertures Using Graphene,” 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, GA, USA, 2019, pp. 511-512.
  10. P. C. Theofanopoulos and G. C. Trichopoulos, “On-Wafer Graphene Devices for THz Applications Using a High-Yield Fabrication Process,” 2019 IEEE MTT-S International Microwave Symposium (IMS), Boston, MA, USA, 2019, pp. 1107-1110.
  11. M. Aladsani, A. Alkhateeb, and G. C. Trichopoulos, “Leveraging mmWave Imaging and Communications for Simultaneous Localization and Mapping,” ICASSP 2019 – 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, United Kingdom, 2019, pp. 4539-4543.
  12. P. C. Theofanopoulos and G. C. Trichopoulos, “A Novel Fingerprint Scanning Method Using Terahertz Imaging,” 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Boston, MA, USA, 2018, pp. 2463-2464.
  13. S. k. Doddalla and G. C. Trichopoulos, “Around the Corner Terahertz Radar Imaging Exploiting Diffusion Scattering,” 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Boston, MA, USA, 2018, pp. 231-232.
  14. P. C. Theofanopoulos and G. C. Trichopoulos, “A Terahertz Microscopy Technique for Sweat Duct Detection,” 2018 IEEE/MTT-S International Microwave Symposium – IMS, Philadelphia, PA, 2018, pp. 864-867.
  15. S. k. Doddalla and G. C. Trichopoulos, “Non-Line of Sight Terahertz Imaging from a Single Viewpoint,” 2018 IEEE/MTT-S International Microwave Symposium – IMS, Philadelphia, PA, 2018, pp. 1527-1529.
  16. P. C. Theofanopoulos and G. C. Trichopoulos, “A novel THz radar imaging system using the radon transform,” 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, San Diego, CA, USA, 2017, pp. 1513-1514.
  17. Y. Cui and G. C. Trichopoulos, “Toward a terahertz quasi-optical vector network analyzer,” 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, San Diego, CA, USA, 2017, pp. 1511-1512.
  18. G. C. Trichopoulos, “Sub-millimeter wave low-profile imaging modules (SLIMs),” 2016 IEEE International Symposium on Antennas and Propagation (APSURSI), Fajardo, 2016, pp. 251-252.
  19. Y. Karisan, C. Caglayan, G.C. Trichopoulos, and K. Sertel, ” Lumped-element modeling of millimeter-wave HEMT parasitics via full-wave electromagnetic analysis,” 37th IEEE Compound Semiconductor IC(CSIC) Symposium, New Orleans, Louisiana, Oct 2015.
  20. G. C. Trichopoulos and K. Sertel, “Polarimetric terahertz probe for endoscopic assessment of malignancies,” 2015 IEEE International Symposium on Antennas and Propagation, Vancouver, BC Canada, July 2015.
  21. S. Saqueb, G.C. Trichopoulos, and K. Sertel, “A 4K pixel terahertz compressive sensing camera,” 2015 IEEE International Symposium on Antennas and Propagation, Vancouver, BC Canada, July 2015.
  22. C. Caglayan, G.C. Trichopoulos, and K. Sertel, “Wideband on-chip antennas for non-contact characterization of mmW and THz devices and integrated circuits,” 2015 IEEE International Symposium on Antennas and Propagation, Vancouver, BC Canada, July 2015.
  23. Y. Karisan, C. Caglayan, G. C. Trichopoulos, and K. Sertel “Distributed modeling of submillimeter-wave HEMT parasitics based on full-wave electromagnetic analysis,” 2015 IEEE International Microwave Symposium, Phoenix, AZ USA, May 2015.
  24. G. C. Trichopoulos and K. Sertel, “Sub-wavelength terahertz imaging system using a vector network analyzer,” 2014 USNC-URSI Radio Science Meeting, Memphis, TN USA, July 6-11, 2014.
  25. C. Caglayan, G.C. Trichopoulos, and K. Sertel,”Non-contact probes for device and integrated circuit characterization in the THz and mmW bands,” 2014 IEEE International Microwave Symposium, Tampa, FL USA, June 1-6 2014.
  26. G. C. Trichopoulos and K. Sertel, “THz and mmW on-wafer device and integrated circuit characterization with non-contact probes,” 2014 IEEE International Symposium on Antennas and Propagation, Memphis, TN USA, July 6-11, 2014.
  27. C. Caglayan, G. C. Trichopoulos, and K. Sertel, “Non-contact device and integrated circuit characterization in the G-band (140-220GHz),” 2014 IEEE International Symposium on Antennas and Propagation, Memphis, TN USA, July 6-11, 2014 (Finalist Paper).
  28. C. Caglayan, G. C. Trichopoulos, and K. Sertel, “On-wafer device characterization with non-contact probes in the THz band,” 2014 IEEE International Symposium on Antennas and Propagation, Memphis, TN USA, July 6-11, 2014.
  29. A. Roedig, D. J. Burdette, J. J. Law, G. C. Trichopoulos, K. Sertel and Howard L. Mosbacker, ” Initial results of a real-time, quad-frequency, polarization-sensitive THz line camera “, Proc. SPIE 9102, Terahertz Physics, Devices, and Systems VIII: Advanced Applications in Industry and Defense, 910205 (May 21, 2014).
  30. G. C. Trichopoulos and K. Sertel, “Limited-angle THz computed tomography for tissue imaging,” USNC/URSI National Radio Science Meeting, Boulder, CO, Jan. 8–11, 2014.
  31. G. C. Trichopoulos and K. Sertel, “Large format focal plane array for rapid THz computed tomography,” 2013 IEEE International Symposium on Antennas and Propagation, Orlando, FL USA, July 9-14, 2013 (1st paper award).
  32. C. Caglayan, G.C. Trichopoulos, and K. Sertel, “Non-contact probe calibration for THz-frequency device characterization,” Microwave Measurement Conference, 2013 82nd ARFTG, pp.1-2, 18-21 Nov. 2013.
  33. G. C. Trichopoulos, C. Caglayan, and K. Sertel, “Hybrid electromagnetic modeling of non-contact probes for terahertz device characterization,” Computational Electromagnetics Workshop (CEM), 2013, pp.52-53, 2-5 Aug. 2013.
  34. C. Caglayan, G. C. Trichopoulos, and K. Sertel, “On-wafer device characterization with non-contact probes in the THz band,” 2013 IEEE Int. Symposium on Antennas and Propagation, Orlando, FL USA, July 9-14, 2013.
  35. G. C. Trichopoulos and K. Sertel, “Terahertz Computed Tomography Using a Large-format Focal Plane Array Sensor,” USNC/URSI National Radio Science Meeting, Boulder, CO, Jan. 9–12, 2013.
  36. G. C. Trichopoulos and K. Sertel, “Hybrid electromagnetic modeling of terahertz focal plane array imaging sensors”, Applied Computational Electromagnetics Society Conference, April 10-14, 2012, Columbus, OH USA.
  37. D. Burdette, C. Roeadig, J. Alverbro, P. Fay, K. Sertel, Y Ni, G.C. Trichopoulos, K. Topalli, and H. L. Mosbacker, “Recent experimental results of a large format 80×64 pixel THz camera sensitive to 0.6 – 1.2 THz radiation” in Optical Sensors, Optical Society of America (OSA), Monterey, CA, June 25, 2012.
  38. G. C. Trichopoulos and K. Sertel, “Quasi-optical imaging performance of THz focal plane array antennas,” 2012 IEEE International Symposium on Antennas and Propagation, Chicago, IL USA, July 9-14, 2012.
  39. K. Topalli, G. C. Trichopoulos, and K. Sertel, “Non-contact probes for THz circuits and integrated devices,” 2012 IEEE International Symposium on Antennas and Propagation, Chicago, IL USA, July 9-14, 2012.
  40. D. J. Burdette, J. Alverbro, Z. Zhang, P. Fay, Y. Ni, P. Potet, K. Sertel,  G. Trichopoulos, K. Topalli, J. Volakis,  and H. L. Mosbacker, “Development of an 80 x 64 pixel, broadband, real-time THz imager,” Proc. SPIE 8023, Terahertz Physics, Devices, and Systems V: Advance Applications in Industry and Defense, 80230F (May 25, 2011).
  41. G. C. Trichopoulos and K. Sertel, “Imaging performance of a THz focal plane array,” 2011 IEEE International Symposium on Antennas and Propagation, pp. 1882 – 1884, July 2011.
  42. K. Topalli, G. C. Trichopoulos, and K. Sertel, “An indirect impedance characterization method for monolithic THz antennas,” 2011 IEEE International Symposium on Antennas and Propagation, pp.1882 – 1884, July 2011.
  43. K. Topalli, G.C. Trichopoulos, and K. Sertel, “An indirect impedance characterization method for monolithic double-slot antennas for THz sensors,” General Assembly and Scientific Symposium, 2011 XXXth URSI, pp.1,4, 13-20 Aug. 2011, Istanbul, Turkey.
  44. G. C. Trichopoulos, K. Sertel, and J. L. Volakis, “Slot spiral detector array for broadband THz imaging,” 2010 IEEE International Symposium on Antennas and Propagation, Toronto, ON, Canada, Jul.11–17, 2010.
  45. G. C. Trichopoulos, G. Mumcu, K. Sertel, L. H. Mosbacker, Y. Tang, Z. Zhang, P. Fay, and J. L. Volakis, “A focal plane array for high sensitivity direct detection of excised tissue characteristics,” in USNC/URSI National Radio Science Meeting Digest, Charleston, SC, Jun. 1–5, 2009.
  46. G. C. Trichopoulos, I.S. Karanasiou, and N.K. Uzunoglu, “Enhancing the focusing properties of an ellipsoidal beamformer based imaging system: a simulation study,” Engineering in Medicine and Biology Society, 2006. EMBS ’06. 28th Annual International Conference of the IEEE, pp.5097-5100, Aug. 30 2006-Sept. 3 2006.

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