报告题目：

Phosphor-converted Infrared Light Sources

主讲人：Professor Xiaojun Wang

Department of Physics, Georgia Southern University, Statesboro, GA 30460, USA

报告时间：2026年6月22日下午14:00-16:30

报告地点：大连海事大学理学院 数理楼221

报告摘要：

Phosphor-converted white light-emitting diodes (LEDs) have revolutionized modern illumination technology, while their infrared counterparts remain in the developmental stage. In this talk, the speaker will present transition metal ion-doped phosphors (such as Cr³⁺ and Ni²⁺), which are efficiently pumped by blue LEDs or laser diodes (LDs), as promising high-performance infrared light sources spanning the near infrared (NIR) and short-wave infrared (SWIR) regions. Key advantages of these materials, including broad emission bandwidth, high quantum efficiency, and excellent thermal stability, will be highlighted. The underlying physics of the d-d transitions, energy transfer mechanisms, and activator-host interactions will be discussed in detail. Furthermore, the talk will showcase recent material developments and device prototypes, demonstrating their strong potential for applications in non-invasive medical imaging, night-vision surveillance, food quality inspection, and advanced spectroscopy.

Short Bio：

Xiaojun Wang earned his BS degree in Physics from Jilin University, his MS from the Chinese Academy of Sciences and the Florida Institute of Technology, and his PhD from The University of Georgia, USA. He served as a Postdoctoral Associate at Oklahoma State University (1992–1993) and as an NIH Postdoctoral Fellow at UC Irvine (1993–1995). Since 1995, he hasbeen a Professor of Physics at Georgia Southern University, USA. Dr. Wang is a Fellow of the American Physical Society, the Editor-in-Chief of Materials Research Bulletin (2025-), and an editor for Light: Science & Applications (2012-).