Giant Broadband One Way Transmission Based on Directional Mie Scattering and Asymmetric Grating Diffraction Effects  

作　　者：Xuannan Wu Guanwen Yuan Rui Zhu Jicheng Wang Fuhua Gao Feiliang Chen Yidong Hou 吴轩楠;袁官文;朱瑞;王继成;高福华;陈飞良;侯宜栋(College of Physics,Sichuan University,Chengdu 610064;Microsystem and Terahertz Research Center,China Academy of Engineering Physics,Chengdu 610299;School of Science,Jiangnan University,Wuxi 214122;Key Laboratory of High Energy Density Physics(Ministry of Education),Sichuan University,Chengdu 610064)

机构地区：[1]College of Physics,Sichuan University,Chengdu 610064 [2]Microsystem and Terahertz Research Center,China Academy of Engineering Physics,Chengdu 610299 [3]School of Science,Jiangnan University,Wuxi 214122 [4]Key Laboratory of High Energy Density Physics(Ministry of Education),Sichuan University,Chengdu 610064

出　　处：《Chinese Physics Letters》2020年第4期57-61,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.11604227。

摘　　要：High performance optical diode-like devices are highly desired in future practical nano-photonic devices with strong directional selectivity.We demonstrate a kind of giant broadband reciprocity optical diode-like devices by simultaneously using the directional Mie scattering effect and the asymmetric grating diffraction effect.The maximum asymmetric subtraction and the asymmetric transmission ratio can reach nearly 100%and 40dB at specified wavelength,respectively.In a wide waveband from 500nm to 800nm,the asymmetric subtraction and the ratio keep larger than 80%and 3.5 dB,respectively,even under oblique incidence.To the best of our knowledge,this is the best one-way-transmission effect observed in the reciprocity optical diode-like devices.In addition,we further demonstrate that this one-way-transmission effect can bring an effective absorption enhancement on gold films.The giant,broadband and angle-insensitive one-way-transmission effect demonstrated here is far beyond the well-known anti-reflection effect in the light-trapping devices and will bring new design philosophy for nano-photonic devices.

关 键 词：SCATTERING effect directional 

分 类 号：TN111[电子电信—物理电子学]