报告题目：Metal-Organic Frameworks for Nonlinear Optics

主讲人：Prof. Ji Wei（季伟），Department of Physics，National University of Singapore

邀请人：陆顺斌 博士

报告时间：2023年8月3日上午10:00

报告地点：深圳大学沧海校区致腾楼223会议室

Abstract: Multiphoton upconversion is a process where two or more photons are absorbed simultaneously to excite an electron to an excited state and, subsequently, the relaxation of electron gives rise to the emission of a photon with frequency greater than those of the absorbed photons. Materials possessing such nonlinear optical property attracted attention due to applications in biological imaging, photodynamic therapy, three-dimensional optical data storage, frequency-upconverted lasing and optical power limiting. In recent times, materials based on metal–organic frameworks (MOFs) have been extensively investigated as they hold the key for promising hybrid materials with unique properties. By taking advantage of the combined properties of the metal ions that connect the organic ligands, many functional materials suitable for multiphoton upconversion. In this talk, I will give introduction to multiphoton absorption in MOF crystals or films and present recent works about the two-, three-, four-, and five-photon absorption in MOF co-crystals. Furthermore, I will discuss how to take the advantage of theses MOFs for enhancement in multiphoton absorption and third-harmonic generation.  

Biography：Prof. Ji Wei received his B.S. from Fudan University (1982), M.S. and Ph.D. from Heriot-Watt University, Edinburgh, UK (1984, 1986) respectively. He joined Department of Physics, National University of Singapore as Lecturer, Senior Lecturer, Associate Professor, and Professor since 1991. His pioneering works are well recognized of optical limiting with metal clusters, carbon nanotubes and graphene. And his recent works in multi-photon absorption in MOFs and TMDs were also well cited. He has published 300 papers in scientific journals listed in the ISI Web of Knowledge, given more than 50 conference presentations, and delivered over 40 invited talks. Total citation of his papers is over 10000 with the h-index of 69.