题目：Nanophotonic manipulation of photon angular momenta for on-chip applications

报告人：Dr. Haoran Ren（Swinburne University of Technology）

主持人：李向平教授

时间：2016年6月1日（星期三）下午4：00

地点：曾宪梓科学馆四楼405会议室

报告摘要：

As a green technology, light has played a crucial role in the age of information technologies. The ever-increasing demand for high-capacity optical applications has propelled the use of physical dimensions of light including intensity, wavelength, polarization and mode for information multiplexing (a process in which parallel light channels are optically addressed in a shared medium to obtain an increased capacity). The angular momentum (AM) of light includes spin angular momentum possessed by circularly polarized light and orbital angular momentum exhibited by the twisted wavefront of light. AM has thus emerged as a new multiplexing method for high capacity communications ranging from free-space to compact optical fiber. The realization of on-chip AM multiplexing, however, remains a fundamental challenge because there is no natural material that can be used to sense twisted light. This talk will briefly review the state-of-the-art of the nanophotonic manipulation of AM, especially will focus on the approaches of chip-scale generation and detection of AM of light. I will also introduce our recent work in the design of an integrated nanophotonic chip with which we can achieve noninterference AM sensitivity, with the use of mode-sorting nanoring slits. In addition, I will discuss the potentials of our miniature and ultrawide bandwidth chip for wide-ranging applications.

报告人简介:

Mr. Haoran Ren is a Ph.D. candidate at Swinburne University of Technology. He obtained his Bachelor degree in Physics (2010) and Master degree in Optical Engineering (2012) from Ocean University of China. He pursued his Ph.D. study in an Australian research team lead by Professor Min Gu (Fellow of the Australian Academy of Science as well as the Australian Academy of Technological Sciences and Engineering) since 2013. His research interests are nanophotonics and information technologies. He has published 7 internationally refereed high impact papers in nanophotonics including one in Top journal of Science with Mr. Ren as the first author. He has also attended many international conferences with oral presentations. He was awarded the Robert S.Hilbert Memorial Student travel grant in 2015 from the Optical Society.

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光子技术研究院

2016年5月18日