WUHAN, China (September 7, 2018) - Wuhan Optoelectronics Forum No. 146 was successfully held in Auditorium A101 at Wuhan National Laboratory for Optoelectronics (WNLO) in the morning of September 7. Prof. Yan Zhang from Capital Normal University delivered an exciting talk entitled Acquisition and Modulation of Terahertz Wave Front. Prof. Jun Zhou, Deputy Director of WNLO, chaired the forum. Prof. Xinliang Zhang, Deputy Director of WNLO, awarded Prof. Yan Zhang the forum medal.
Due to many unique advantages of terahertz radiation, it has important potential applications in the field of communication and imaging. Compared with the sources and detectors of terahertz, the functional devices of terahertz are still immature, which hinders the wide application of terahertz technology. This report describes the progress of terahertz wavefront acquisition and modulation in Beijing Key Laboratory of Metamaterials and Devices, Capital Normal University. The frequency, amplitude, phase and polarization of terahertz radiation are measured by a self-developed terahertz pulsed focal plane imaging system. The vortex beam and surface plasmon devices in terahertz band are characterized by this system. The terahertz wavefront can also be modulated by metasurface technology. The ultra-thin terahertz flat lens, long focal depth lens, multi-focal lens, terahertz holography, color-splitting imaging holography and polarization-selective lens are designed. A terahertz wavefront modulator is proposed based on the photoelectric characteristics of semiconductor materials in the terahertz band, and the terahertz wavefront modulation based on the dynamic metasurface is also realized.
Prof. Yan Zhang, director of Beijing Key Lab for Matematerials and Devices. He was elected to the Program for New Century Excellent Talents in University, Beijing Science Nova Program, Beijing BaiQianWan Talents Program, and Beijing Great Wall Scholar. Prof. Zhang received his bachelor and master degrees from Harbin Institute of Technology and doctor degree from Institute of Physics, Chinese Academy of Science. He has worked in Yamagata University, Japan, Hong Kong Polytechnic University, Stuttgart University, Germany, Hong Kong University of Science and Technology, Rensselaer Polytechnic Institute, USA, and University Konstanz, Germany. His research interests include terahertz imaging and spectroscopy, surface plasmonic optics, optical information processing. He has published more than 220 prereviewed papers and delivered more than 30 invited talks.
