| 报告题目： |
High-Q micro-disk cavities and their applications |
| 报告人： |
肖敏 |
| 报告人单位： |
南京大学物理学院国家固体微结构实验室 |
| 报告时间： |
2018年5月28日上午10:00 |
| 报告地点： |
引力中心3楼会议室 |
| 报告摘要： |
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The whispering gallery modes of micro-disk cavities can have very high quality (Q) factors and small mode volumes. Such high-Q micro-disk cavities have been widely used for ultra-sensitive biosensors, low-threshold and narrow linewidth lasers, cavity-QED studies, frequency comb, and cavity opto-mechanics applications.
When two or more high-Q micro-cavities are coupled together, interesting mode splitting effects occur. With precisely controlled coupling between two micro-disk cavities, EIT (electromagnetically induced transparency)-like phenomenon can be observed and carefully studied. More interestingly, when one of the micro-toroid cavities has a gain that balances the loss in the other micro-cavity, the novel effect of parity-time (PT) symmetry appears in this system. By making use of the gain saturation nonlinearity in the active micro-cavity, nonreciprocal light transmission can be achieved in various micro-cavity systems. Also, with the help of directional nonlinear parametric amplification process in the micro-cavity, true optical isolation can be achieved.
In this talk, I will present some of our experimental works on demonstrating micro-cavity lasers, coupled micro-disk cavities, parity-time symmetric effects, and optical isolation. |
| 报告人简介： |
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Dr. Min Xiao is a Distinguished Professor and an Endowed Chair Professor at the Department of Physics, University of Arkansas and currently holds a joint appointment at the School of Physics, Nanjing University, China. He received Ph.D. in Physics from Department of Physics, University of Texas at Austin in 1988. After worked for two years at MIT as a Postdoctoral Fellow, he joined University of Arkansas in 1990 as an Assistant Professor. He became a full professor in 1998 and Distinguished Professor in 2004. He is a holder of 21Centuary Endowed Chair in Nanotechnology since 2006. Since 2010, Dr. Xiao started to build an optics laboratory at Nanjing University, China. His research interests include quantum optics, nonlinear optics, atomic physics, ultrafast optical spectroscopy, and micro/nano photonics. Dr. Xiao has published more than 410 refereed SCI journal papers, which have been cited totally more than 13,000 times so far (according to the Web of Science). He was elected to be the Fellow of APS and Fellow of OSA both in 2004, and currently serves as the member of the Editorial Board of Physical Review A. |
