Keynote Speakers

Prof. Yong Yue

Xi'an Jiaotong-Liverpool University, China

(IET Fellow)

Experience: Yong Yue (BEng Northeastern China, PhD Heriot-Watt UK, CEng, FIET, FIMechE, FHEA) is a Professor at the Department of Computing, and Director of the Virtual Engineering Centre (VEC) and Suzhou Municipal Key Lab for Intelligent Virtual Engineering. He was Head of the Department of Computer Science and Software Engineering (2013-2019). Prior to joining XJTLU, he had held various positions in industry and academia in China and the UK, including Engineer, Project Manager, Professor, Director of Research and Head of Department. Professor Yue has experience in learning and teaching, research and enterprise as well as management. He has led a variety of research and professional projects supported by major funding bodies and industry. He has also lead curriculum development at both undergraduate and postgraduate levels. He has nearly 300 peer-reviewed publications and supervised 38 PhD students to successful completion.

Prof. Yan Zhang

Capital Normal University, China

Experience: Yan Zhang is a professor in the Department of Physics, Capital Normal University. He is the director of the Beijing Key Laboratory of Metamaterials and Devices, and a fellow of the Optical Society of America. Professor Yan Zhang’s team is mainly engaged in research in terahertz optoelectronics, micro-nano optics, optical information processing, etc., and has published more than 400 SCI papers in internationally renowned journals such as Nature Photonics, Nature Communications, Advance Optical Materials, Opto-Electronic Advances, etc. He has been cited more than 10,300 times by SCI and has given more than 60 invited reports at international conferences.

Title: Terahertz spatial modulators for wavefront manipulation

Abstract:Terahertz radiation has many potential applications such as wireless communication and nondestructive imaging. Spatial modulators are quite important for terahertz communication and imaging. Several terahertz modulators are proposed to meet this requirement. 

Optically controllable spatial modulators are proposed. Using a structured femtosecond light beam to illuminate the silicic wafer, the carriers which can block the transmission of terahertz wave will be generated, thus the intensity of transmitted terahertz wave will be modulated. Terahertz holograms are generated using the intensity modulation and special beams such as vortex beams are generated. Furthermore, the distribution of photo-generated carriers can also server as dynamic metasurface to modulate the phase of transmitted terahertz wave. A dynamic lens with variable focal length and focal point is demonstrated and some special intensity distributions are generated with using PB phase modulation.

Electronically controlled modulators with highly performance operating are in demand for the integration and miniaturization of terahertz-based systems. We proposed a new mechanic for terahertz intensity modulator in which the intensity of terahertz reflections can be controlled by electrically adjusting the electrodynamic interaction of PEDOT:PSS:DMSO and ionic liquid. A controllable terahertz amplitude grating is fabricated to demonstrate the electronically switcher among three modes, which can effectively modulate the angle distribution of the reflected wave. Furthermore, a 3×5 modulator array is fabricated and 10 Arabic numerals are displayed. Overall, the tunable resonance and graphical ability of the device are expected to support the application and development of terahertz modulation devices.