报告题目: Parity-Time Symmetry Photonics: exploiting optical losses 

　　报告人: Prof. Xiang Zhang (张翔) (University of California, Berkeley, USA)  

　　时间: 2016年6月1日(星期三)下午15:00

　　地点: 中科院半导体研究所图书馆101会议室

　　摘要：Abstract: Optical loss is usually undesirable. Recently, judiciously designed balanced gain and loss structures, so called parity-time (PT) symmetric synthetic systems, are explored due to their extraordinary properties. In this talk I will discuss the notion of PT symmetry in optical systems. Especially I will discuss how to achieve nano-scale spectrometer by designing an anti-Hermitian light matter interactions. This will be also useful for spectrum splitting in solar applications. Finally, I will discuss a single mode lasing scheme using PT symmetric periodically modulation in a micro ring lasers.　　

　　简历：Xiang Zhang is the Ernest Kuh Chaired Professor at the University of California, Berkeley and Director of Materials Science Division at Lawrence Berkeley National Laboratory (LBNL). He is also the Director of the NSF Nano-scale Science and Engineering Center (SINAM). He is an elected member of the US National Academy of Engineering (NAE), Academia Sinica and foreign member of Chinese Academy of Sciences. His research in optical metamaterials was selected by Times Magazine as “Top 10 Scientific Discoveries in 2008”. Xiang Zhang was a recipient of many awards including the NSF CAREER Award, Fred Kavli Distinguished Lecturerhip, Fitzroy Medal, Charles Russ Richards Memorial Award, the Max Born Award and the Julius Springer Prize. He received his BS/MS in physics in Nanjing University, China, and Ph.D from UC Berkeley in 1996 and was on faculty at Pennsylvania State University and UCLA prior returning Berkeley faculty in 2004.

　　张翔教授是美国加州大学伯克利分校Ernest Kuh讲座教授，劳伦斯伯克利国家实验室(LBNL)材料科学部主任。同时担任美国国家科学基金会纳米科学及工程研究中心主任。张翔教授获选美国国家工程院院士，台湾中央研究院院士，以及中国科学院外籍院士。他在光学超颖材料方向的开创性研究被美国《时代周刊》列入2008年度全球十大科学发现之一。张翔教授曾多次获得学术大奖项如美国国家科学基金会杰出青年奖（CAREER Award），弗瑞德卡弗里（Fred Kavli）杰出学者奖，菲茨罗伊（Fitzroy）金奖，查尔斯理查德纪念奖(Charles Russ Richards Memorial Award)，马克斯玻恩奖（Max Born Award），裘利斯史普林格奖(Julius Springer Prize)等。

　　张翔教授本科毕业于南京大学物理系，他于1996年获得加州大学伯克利分校博士学位，随后分别在宾夕法尼亚州立大学、加州大学洛杉矶分校任教，2004年起在加州大学伯克利分校任职。