报告题目：Rapid, High-Resolution Optical Data Storage Enabled by Up-Conversion Charging in Phosphors
报告时间：2026年1月9日星期五10:30 am-11:50 am
报告地点：新光电大楼1026会议室
报告人：王笑军教授
邀请人：禹德朝
报告内容：
Conventional phosphor-based optical storage technologies are limited by slow and imprecise data recording arising from inefficient charging mechanisms. Here, we demonstrate an up-conversion charging (UCC) strategy that enables rapid, high-resolution optical information storage in phosphors. The UCC process is based on a two-step ionization mechanism combined with nonlinear charging, allowing efficient population of charge traps under low-power excitation. As a result, data writing can be achieved with an exposure time as short as 0.01 s per bit using a portable diode-laser engraver. Compared with conventional charging approaches, UCC significantly enhances recording efficiency while maintaining long-term data retention and excellent rewritability. These results highlight the strong potential of up-conversion charging as a practical route toward fast, high-density, and durable optical information storage using phosphor materials.
报告人简介：
Professor Xiao-Jun Wang (王笑军) received his Bachelor’s degree from Jilin University, his Master’s degrees from the Chinese Academy of Sciences, and his Ph.D. in Physics from the University of Georgia, USA. He conducted postdoctoral research at Oklahoma State University and later served as an NIH Postdoctoral Fellow at the University of California, Irvine. Since 1995, he has been a Professor of Physics at Georgia Southern University, USA. Professor Wang’s research centers on the optical properties of solids and he has been listed among the Stanford/Elsevier Top 2% Scientists. He currently serves as Editor-in-Chief of Materials Research Bulletin and as an Editor for Light: Science & Applications. He is also a Fellow of the American Physical Society.
