2024 World Symposium on 6G Communications and Terahertz Technology (6GCTT 2024)

Speakers

Keynote Speakers

张岩.jpg

Prof. Yan Zhang, Capital Normal University, China(H-index: 46)

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 340 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 8,000 times by SCI and has given more than 50 invited reports at international conferences.

Title: Structured light beams for terahertz communications

Abstract: Terahertz radiation, which is sandwiched between the infrared and microwave in the electromagnetic spectrum, has been considered as a candidate for future wireless communications. In order to increase communication capacity, orbital angular momentum multiplexing technology should be adopted. A single metasurface which can be used for terahertz orbital angular momentum multiplexing and demultiplexing is designed. The designed structure can generate four phase vortex beams that have different topological charges under illumination by a Gaussian beam with different incident angles, which means that OAM multiplexing with four channels is realized. When an individual vortex beam is used as the incident light, only one channel is identified and extracted as a focal spot; that is, demultiplexing of the OAM signal is achieved. The structure has subwavelength-level thickness, which enriches the number of potential approaches available for the miniaturization and integration of THz communication systems. An abruptly autofocusing ring-Airy beam is demonstrated with a meta-hologram. The designed meta-hologram is composed of gold C-shaped slot antennas, which can realize both phase and amplitude modulation of the incident THz wave. An abrupt focus following a parabolic trajectory is subsequently observed. The Airy beams can provide a curved channel for wireless communications. A reflective metalens that can gather light from many directions and focus it at a fixed place is also presented. This reflective metalens is capable of consistently and efficiently reflecting incident light from a wide angle of incidence and focusing it into one spot. Experiments in a 220 GHz environment were used to confirm the reflective metalens’s functionality. It is expected these metasurface can provide more functional devices for 6G communication. 


侯磊.png

Prof. Lei Hou, Xi' an University of Technology, China

Lei Hou, is a professor at Xi'an University of Technology, a leading talent in scientific and technological innovation under the Shaanxi Provincial Special Support Plan, a leader of a key scientific and technological innovation team in Shaanxi Province and a recipient of the Xi'an Youth Science and Technology Talent Award. His research interests include high-power terahertz photoconductive antennas and high excited state discharge gas terahertz wave detectors. He hosted nearly 20 scientific research projects, including 5 national level projects; published over 60 academic papers indexed by SCI; authorized more than 10 national invention patents; won two second prizes of the Shaanxi Provincial Science and Technology Award. 



Invited Speakers

王新柯.jpg

Prof. Xinke Wang, Capital Normal University, China

Prof. Dr. Wang Xinke is from Department of Physics, Capital Normal University, Beijing. Prof. WANG Xinke’s research activities are focused on THz imaging technology and THz metasurface. Prof. WANG has published more than 30 peer reviewed papers, including Light: Science & Applications, Advanced Optical Materials, Optics Letters, Optics Express, Applied Physics Letters etc. His researches received the support from National Natural Science Foundation of China and Beijing Natural Science Foundation etc.


胡国庆.jpg

Assoc. Prof. Guoqing Hu, Beijing Information Science and Technology University, China

He received the B.Eng. degree in material science and technology from Tianjin University of technology in 2011, Tianjin, China, and the Ph.D. degree in optical engineering from Beihang University, Beijing, China, in 2017. From 2017 to 2018, he was an engineer in State Key Laboratory of Space-Ground Integrated Information Technology, Beijing, China. Subsequently, he worked as a postdoctoral researcher in Beihang University from 2018 to 2020. Currently, he is an associate professor at Beijing Information Science and Technology University. He had been a Visiting Student at the University of Tokushima, Japan, for six months between 2015 and 2017. His current research interests include ultrafast laser, optical comb, optical metrology, laser processing and THz comb metrology.


李慧宇.jpg

Assoc. Prof. Cheng Zhang, Beijing Information Science and Technology University, China

Dr. Huiyu Li graduated from the Institute of Applied Optics in the Mechanical Department of the University of Stuttgart in Germany in 2019. After returning to China, she joined Beijing Information Science and Technology University. She is dedicated to research in the fields of metasurface, super-resolution imaging etc. During her studies and employment, she has participated in and led multiple research projects, and published over ten papers as the first author or corresponding author in magazines such as Optic Express and Optical Materials.