Slow-light odd mode in a photonic crystal waveguide

The International Symposium on Photonics and Optoelectronics(SOPO 2014)——We demonstrate a novel scheme to excite an odd mode in a photonic crystal waveguide, and measure essential mode properties such as the transmission spectrum and group velocity of this slow light mode. Although the existence of a slow-light odd mode in a photonic crystal waveguide has been theoretically predicted for a long time, direct observation of such a mode has been elusive. Particularly, its basic characteristics such as slow group velocity have not been measured experimentally. Here and odd-mode Mach-Zehnder coupler is introduced to excite the odd mode with very high purity. In a silicon-on-insulator configuration, >20 nm transmission bandwidth and >20 dB signal contrast against background transmission are obtained for this odd mode in a photonic crystal waveguide. The group index of this slow-light odd mode is measured with a mode beating method, assisted by a mixed-mode Mach-Zehnder coupler. Potential applications of this slow-light odd mode, the Mach-Zehnder coupler, the slow light mode-beating method reported here in CMOS-compatible optical isolators, multimode communications, and other research topics will be discussed.

关键词： 光子晶体波导特性 慢光效应 耦合谐振器 The International Symposium on Photonics and Optoelectronics(SOPO 2014)

主讲人：A.P. Wei Jiang 机构：Department of Electrical and Computer Engineering,Rutgers University

时长：0:09:49 年代：2014年