腾讯会议ID：368-888-266

会议密码：0701

主持人：方少波 副研究员

联系人：傅琦 (fuqi@iphy.ac.cn)

Abstract:

Terahertz (THz) technologies are emerging as a key platform for next-generation wireless communications, imaging, and sensing. Despite their promise for next generation communications, THz technologies remain constrained by the weak interaction between natural materials and THz waves, known as the terahertz gap. In this talk, I will present our recent advances in metasurface-enabled THz modulators and detectors that address these challenges. First, I will introduce a graphene-based metasurface modulator that exploits capacitance-driven resonance tuning instead of conventional resistive damping, achieving unity amplitude modulation. Second, I will present a metasurface-based THz detector based on a newly developed in-plane photoelectric effect (IPPE), providing efficient zero-bias THz detection through a fundamentally new photodetection mechanism. These results demonstrate how metasurface engineering can overcome fundamental material limitations and enable high-performance THz signal modulation and detection for future communication, imaging, and sensing applications.

Brief CV of Dr. Ruqiao Xia:

Dr. Ruqiao Xia is a Scientist at the Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), Singapore. She earned her Bachelor’s degree at the University of Manchester and completed her PhD in Physics at the Cavendish Laboratory, University of Cambridge, under Prof. David Ritchie. Her research focuses on the design, optimization, and fabrication of metasurfaces and nanophotonic structures for tunable amplitude and phase control in the terahertz and infrared spectral regions. Dr. Xia has contributed to both the fundamental understanding and practical implementation of next generation photonic and optoelectronic devices, advancing the development of functional, highly reconfigurable optical systems.