A planar chiral nanostructure with asymmetric transmission of linearly polarized wave and huge optical activity in near-infrared band  

作　　者：刘道亚 罗孝阳 刘锦景 董建峰 

机构地区：[1]Institute of Optical Fiber Communication and Network Technology, Ningbo University

出　　处：《Chinese Physics B》2013年第12期256-261,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61078060);the Fund from the Ningbo Optoelectronic Materials and Devices Creative Team,China(Grant No.2009B21007);partially sponsored by K.C.Wong Magna Fund in Ningbo University

摘　　要：Just like an electronic diode that allows the electrical current to flow in one direction only, a kind of chiral metamaterial structure with a similar functionality for the electromagnetic wave is proposed. The designed nanostructure that consists of twisted metallic split-ring resonators on both sides of a dielectric substrate achieves asymmetric transmission for a forward and backward propagating linearly polarized wave by numerical simulation in near-infrared band. Difference in transmission efficiency of the optimized structure between the same polarized waves incident from opposite directions can reach a maximum at the communication wavelength （1.55 μm）. Moreover, the simulation results of this structure also exhibit strong optical activity and circular dichroism.Just like an electronic diode that allows the electrical current to flow in one direction only, a kind of chiral metamaterial structure with a similar functionality for the electromagnetic wave is proposed. The designed nanostructure that consists of twisted metallic split-ring resonators on both sides of a dielectric substrate achieves asymmetric transmission for a forward and backward propagating linearly polarized wave by numerical simulation in near-infrared band. Difference in transmission efficiency of the optimized structure between the same polarized waves incident from opposite directions can reach a maximum at the communication wavelength （1.55 μm）. Moreover, the simulation results of this structure also exhibit strong optical activity and circular dichroism.

关 键 词：asymmetric transmission optical activity linearly polarized wave circular dichroism 

分 类 号：O436[机械工程—光学工程]