基于光子晶体微腔的OAM模产生和调控  

Generation and Modulation of OAM Modes Based on Photonic Crystal Microcavity

作　　者：熊志刚 XIONG Zhi-gang(School of Electronic Engineering,Nanjing Xiaozhuang University,Nanjing 211171,China)

机构地区：[1]南京晓庄学院电子工程学院

出　　处：《南京晓庄学院学报》2019年第6期14-17,共4页Journal of Nanjing Xiaozhuang University

摘　　要：光子可以同时具有自旋角动量和轨道角动量(orbital angular momentum,OAM),而OAM模在信息光学等领域中有着广泛的潜在应用。文章中利用二维平板光子晶体微腔的本征模和连续单色点光源之间的模式叠加来产生OAM模。通过调节点光源的位置,获得了拓扑荷为+1和-1的OAM模。这种基于光子晶体微腔的OAM模产生和调控机制,能够在不改变光子晶体微腔设计参数的情况下,仅通过改变光源的参数,就能产生不同的OAM模。Photons have spin angular momentum and orbital angular momentum(OAM)simultaneously,and the OAM mode has extensive potential applications in information optics field.In this paper,OAM modes are generated and modulated based on the superposition of the eigenmode of photonic crystal microcavity and the continuous monochrome point source.OAM modes with topological charge+1 and-1 are generated by tuning the position of point source in the microcavity.This photonic crystal microcavity based OAM mode generation and modulation mechanism can produce different OAM modes by changing merely the parameters of light sources,without changing the design parameters of photonic crystal microcavity.

关 键 词：光子晶体微腔 模式叠加 OAM模 

分 类 号：O734[理学—晶体学]