Ultra-wideband optical diode based on photonic crystal 90° bend and directional coupler  

作　　者：卢瑾 任宏亮 郭淑琴 顾东袁 温浩 覃亚丽 周守利 胡卫生 姜淳 

机构地区：[1]College of Information Engineering,Zhejiang University of Technology [2]State Key Laboratories of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University

出　　处：《Chinese Optics Letters》2014年第10期96-99,共4页中国光学快报（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(Nos.60907032,61205121,and 61275124);the China Postdoctoral Science Foundation(No.2013M540361);the Natural Science Foundation of Zhejiang Province(No.LY13F010011);the Zhejiang Youth Science Fund(No.LQ13F050005)

摘　　要：We propose an ultra-wideband optical diode device based on two-dimensional square-lattice photonic crystals. For the device, the odd mode is completely transmitted in one direction and converted to the fundamental even mode, but completely reflected in the other direction. The operation bandwidth of the device is preserved within a rather wide range of frequencies, which is over 6.5% of the central frequency. A directional coupler and 90° bend are utilized as the composite function device with mode filter and mode converter. It is possible that the photonic crystal device can help to construct on-chip optical logical devices and benefit greatly to the optical systems with multiple spatial modes.We propose an ultra-wideband optical diode device based on two-dimensional square-lattice photonic crystals. For the device, the odd mode is completely transmitted in one direction and converted to the fundamental even mode, but completely reflected in the other direction. The operation bandwidth of the device is preserved within a rather wide range of frequencies, which is over 6.5% of the central frequency. A directional coupler and 90° bend are utilized as the composite function device with mode filter and mode converter. It is possible that the photonic crystal device can help to construct on-chip optical logical devices and benefit greatly to the optical systems with multiple spatial modes.

关 键 词：Directional couplers Optical lattices Photonic devices Ultra wideband (UWB) 

分 类 号：TN31[电子电信—物理电子学]