摘要
基于平面角谱扩展法和4×4矩阵传输理论,研究了拉盖尔-高斯光束(LGB)在含拓扑绝缘体(TI)周期性层状薄膜中的反射和透射特性,对线偏振的LGB入射到周期性层状薄膜中的反射场和透射场的强度分布进行了分析和详细讨论。研究结果表明,TI的拓扑磁电极化率(TMEP)和薄膜的周期个数对强度分布有很大影响,通过改变TMEP或周期个数可以操纵涡旋光的光场。所提方法不仅可以推广到其他含TI的多层介质体系,而且对进一步研究TI光子晶体中的光子能带结构和带隙具有一定的意义。
This study presents the reflection and transmission characteristics of Laguerre Gaussian beam(LGB)from the periodic layered film with topological insulator(TI)based on angular spectrum expansion and 4×4 matrix transfer theory.For the incidence of linearly polarized LGB on the periodic layered film,the intensity distributions of the reflected and transmitted fields are evaluated and discussed.It is shown that the intensity distributions are greatly influenced by the topological magneto-electric polarizability(TMEP)of TI and the periods of the TI periodic layered film.This investigation provides a new method to manipulate the light field of vortex beams by changing the TMEP value or the periods of TI films.The methods presented herein can be extended to different TI-layers and provide reference for the research on photonic band structures and band gaps in TI photonic crystals in further research.
作者
王明军
林妞妞
Wang Mingjun;Lin Niuniu(School of Automation and Information Engineering,Xi′an University of Technology,Xi′an,Shaanxi,710048,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2020年第1期189-195,共7页
Chinese Journal of Lasers
基金
国家自然科学基金(61771385)
国防重点实验室基金项目(6142404180301)
陕西省自然科学基金(2018JQ6094)
陕西省重点产业创新项目(2017ZDCXL-GY-06-01)。
关键词
物理光学
拉盖尔-高斯光束
拓扑绝缘体
拓扑磁电极化率
反射和透射
physical optics
Laguerre-Gaussian beams
topological insulators
topological magneto-electric polarizability
reflection and transmission
作者简介
林妞妞,E-mail:niuniulinxaut@163.com。
