报告题目：Crescent waves in optical cavities
时间地点：2012年9月17日上午10点，田家炳楼南205
报告人：李瑞光 副教授（台湾清华大学光电工程研究所）
Abstract: With micro-structured vertical cavity surface emission semiconductors, lasing on extremely higher-order whispering-gallery modes, dynamical chaotic modes, rotating radiation patterns, linear and nonlinear surface modes, and cavity solitons are demonstrated in experiments and simulations, respectively. Especially, we report experimentally the generation of stationary crescent surface solitons pinged to the boundary, with a shape similar to Barchan sand dunes. Without any counterparts in the linear limit, the experimental observations and the simulation results provide an alternative but effective approach to control lasing characteristics and access optical surface modes in semiconductor lasers. As electrons localized at crystalline surfaces known as Tamm and Shockley states, optical surface waves would provide a link in the relating classical and quantum regimes for nonlinear systems.