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Lei Liu, Ph.D. Associate Professor Dept. Electrical Engineering University of Notre Dame 259 Fitzpatrick Hall Phone: 574-631-1628 |
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Welcome to the Terahertz Circuits and Systems Research Laboratory at the University of Notre Dame. We are a part of the Department of Electrical Engineering in the College of Engineering. This laboratory studies the electromagnetic waves in the frequency range of 0.1 to 10 THz (THz region). We investigate and develop advanced THz circuits and systems with superior performance and unique functionalities based on novel devices and materials, and apply our THz technologies to other important areas such as sensing, imaging, communication, radio astronomy, instrumentation, chemical spectroscopy, security, and defense. |
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THz Circuits and Systems Lab |
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NEWS: 06/21/24 Dr. Liu served as a Steering Committee Member and Student Paper Competition Chair for 2024 IEEE International Microwave Symposium (IMS) in Washington, DC. 04/10/24 Paper by Peizhao Li on fully-integrated THz switches won the 2nd place Best Student Paper Award at the 2024 IEEE International Symposium on Space THz Technology (ISSTT, Charlottesville, VA). 03/18/24 Student Yijing Deng successfully defended her Ph.D. thesis. Congratulations, Dr. Deng. 10/05/23 We demonstrated dynamically tuning and reconfiguring microwave band-pass filters using optical control of switching elements, another step forward for achieving superior microwave/THz frequency control. 08/15/23 We have immediate graduate RA openings on THz tunable/reconfigurable filters, high performance THz switches, THz beam steering networks and arrays. Please contact us for application. 08/14/23 Student Yu Shi successfully defended his Ph.D. thesis. Congratulations, Dr. Shi. 06/12/23 Peizhao Li presented his work on optically-controlled THz switches with extremely low insertion loss and superior isolation at IEEE MTT-S IMS. 05/03/23 Paper by Yu Shi on THz imaging using orthogonal heterostructure backward diode detectors published in IEEE Trans. On THz Sci. & Technol. 12/08/22 Paper by Peizhao Li on tunable/reconfigurable bandstop filters using optical switching published in IET Electronics Letters. 09/27/22 Dr. Liu gave invited talk on photo-induced SIW using pillar-array substrates for tunable/reconfigurable THz circuits at the 52nd European Microwave Conference (EUMC). 09/26/22 Paper by Yijing Deng on subwavelength THz imaging using photo-induced coded-apertures on mesa-array structures published in IEEE Trans. On THz Sci. & Technol. 03/16/22 Paper by Yu Shi on fully-integrated and polarization-resolved quasi-optical detector published in IEEE Microwave and Wireless Components Letters. 08/01/19 Yu Shi received the first place Best Student Paper Award at the IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond. 06/05/19 Dr. Liu and team won the prestigious IEEE MTT-S THz Prize (IEEE Trans. THz Science & Technology Best Paper Award) at 2019 IMS in Boston. |
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Demonstration of Photo-Induced THz CAI Approaching Real-Time Performance.
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High Performance Optically Variable WR-4.3 Modulator/Attenuator with 60dB Range and 0.7 dB Insertion Loss. |
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Mesa Array Structures for Advanced THz Sensing, Imaging and Communication.
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