报告时间：2026年9月8日（星期二）19:00-21:00
报告地点：物理楼502室
报 告 人：You Wang 教授
工作单位：Southwest Institute of Technical Physics
举办单位：物理学院
报告简介：
Laser direct processing for various materials has been widely used for many applications. However, the structure size is limited by the normal optical diffraction. When the processing resolution approaches to the theoretical limit, a lot of technical problems will emerge and the cost will become extremely high. With respect to laser processing, the minimum feature size and processing resolution of optical devices are inevitably limited by the diffraction limit of a laser Gaussian beam. The laser-based processing used in nano-optics and photonics cannot be further developed until the diffraction limit is broken. Several fantastic regimes in realization of mirco-processing beyond the diffraction limit, including Two-Photon Polymerization (TPP), Super-resolution Photoinduction-Inhibition Nanolithography (SPIN), Procedure with Evanescent Wave, Procedure with a Super-resolution Phase Plate, Procedure with a Radially Polarized beam, Procedure with a Bessel Beam, and Procedure with Near-field Light, etc., will be introduced in this report. One can see that the diffraction limit could be broken by using these methodologies. Once such technologies come true, advanced photonic devices will be of high speed, high resolution and high integration, forming various types of optical and photonic chips and disks.
报告人简介：
Prof. You Wang received the B.S. degree in laser technology from Zhejiang University, Hangzhou, China, in 1986, and the M.Sc. degree in optics from Hefei University of Technology (registered in Chinese Academy of Science), Hefei, China, in 1991, respectively. He received the Ph.D. degree in electronics/communication from Tohoku University, Sendai, Japan, in 1997. After then, he worked as an assistant professor of Tohoku University, a researcher of the major institutes of RICOH Co. Ltd, and a laser scientist of both the Center Laboratory of HPK Co. Ltd and Institute of Physical and Chemical Research of Japan (RIKEN) for more than 15 years. He is currently a national distinguished professor of China with Southwest Institute of Technical Physics, China. He is also involved in various aspects of theory and practice of several types of lasers as well as their industrial applications. His current research interests include kinetic processes, molecular and atomic physics, solid-state lasers, semiconductor lasers, gas lasers, image processing, micro laser processing, special waveguides and optoelectronic technology. These works have been published in more than 300 refereed scientific papers (reviews) in the scientific journals and academic conferences. He has also applied more than 70 patents in China, Japan, the Unite States, and Europe Union. He is a member of several national special committees belong to the Optical Society of China (OSC), Chinese Society for Optical Engineering (CSOE), China Instrument and Control Society (CIS), the Optical Society of America (OSA), the Laser Society of Japan (LSJ), and Optics and Photonics Society of Singapore (OPSS). He is the chief editor of Laser Technology of China (in Chinese). He is also the members of the Editorial Board for the International Journal of Optics and Applications, Scientific & Academic Publishing (SAP).
