关于举行新加坡国立大学徐清华副教授学术报告的通知
2014-05-19
74
关于举行新加坡国立大学徐清华终身副教授
学术报告的通知
报告题目：Plasmon Enhanced Optical Properties and Applications（有机光电材料超快过程研究）
报告人：徐清华终身副教授（新加坡国立大学）
时间：2014年5月23日下午15:00
地点：国重大楼五楼会议室
摘要：Noble metal nanoparticles, such as gold and silver, are known to display interesting phenomenon called Plasmon resonance, which could be utilized to enhance linear and nonlinear optical properties of nearby chromophores and metal nanoparticles themselves. In this talk I will first present our recent work on plasmon enhanced one- and two-photon excitation fluorescence of nearby chromophores in colloid solutions. In the 2nd part, I will our studies on plasmon coupling enhanced two-photon photoluminescence. Our research group found an interesting phenomenon that non-fluorescence metal nanoparticles started to emit strong two-photon photoluminescence (TPPL) upon plasmon coupling in the aggregated state. We demonstrated that TPPL of these plasmonic metal nanoparticles was enhanced by hundreds of times (in colloid) up to five orders of magnitude (on single particle level) upon plasmon coupling. We have employed ultrafast spectroscopy techniques to understand the underlying enhancement mechanisms. This interesting phenomenon has been further utilized to develop various two-photon sensing, imaging and phototherapy schemes.
报告人简历：XU Qing-Hua received his B.S. from Zhejiang University (1993), M.S. from Peking University (1996) and University of Chicago (1997), Ph.D. from UC Berkeley (2001). He conducted the postdoctoral research at Stanford University and UC Santa Barbara before he joined NUS Chemistry in 2005. He became a tenured Associate Professor since 2011. His primary research interest is development of various light based applications such as sensing, imaging, photosensitization and optoelectronics using various nanomaterials and organic/polymer materials, as well as investigation of the underlying fundamental mechanisms using various novel optical spectroscopy and imaging techniques. For more information about the research in his research group, please visit .
