基于锗锑碲纳米孔结构的可开关电磁诱导透明  

Switchable electromagnetically induced transparency based on Ge 2Sb 2Te 5 nanohole structures

作　　者：江心远 张冬芹 束方洲 焦志伟 JIANG Xinyuan;ZHANG Dongqin;SHU Fangzhou;JIAO Zhiwei(College of Sciences,China Jiliang University,Hangzhou 310018,China;College of Information Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学理学院,浙江杭州310018 [2]中国计量大学信息工程学院,浙江杭州310018

出　　处：《中国计量大学学报》2024年第4期622-627,共6页Journal of China University of Metrology

基　　金：浙江省自然科学基金项目(No.LY22A040006);国家自然科学基金项目(No.12004361,12004362)。

摘　　要：目的:提出一种基于相变材料锗锑碲的超构表面,研究其动态可调光学特性。方法:设计一种锗锑碲双纳米孔周期性阵列结构,利用COMSOL Multiphysics软件对其光学特性进行数值模拟研究。结果:在1~3μm波长范围内支持两个横电模式和一个横磁模式。当锗锑碲处于非晶相时,通过改变双纳米孔结构单元的高度、周期等几何参数,导致两个横电模式之间的相互作用,可实现高品质因子的类电磁诱导透明共振,其群折射率最高达8125。当锗锑碲为晶相时,电磁诱导透明共振消失,实现了电磁诱导透明的可开关调控。结论:这种基于锗锑碲的可开关电磁诱导透明超构表面在慢光器件、传感器等应用中具有重要意义。Aims:This paper aims to propose a metasurface based on phase change material Ge 2Sb 2Te 5 and study its dynamic tunable optical properties.Methods:A periodic array structure of Ge 2Sb 2Te 5 dual nanohole was designed;and its optical properties were numerically simulated using COMSOL Multiphysics software.Results:It supported two transverse electric modes and one transverse magnetic mode in the wavelength range of 1~3μm.When Ge 2Sb 2Te 5 was in the amorphous phase,the adjustment of geometric parameters of the dual nanohole structure such as thickness and period could lead to the interaction between two transverse electric modes,achieving high quality factor's electromagnetically induced transparency(EIT)-like resonance with a maximum group index of 8125.When Ge 2Sb 2Te 5 was the crystalline phase,the electromagnetically induced transparency resonance disappeared,thus achieving switchable control of electromagnetically induced transparency.Conclusions:This switchable electromagnetically induced transparency metasurface based on Ge 2Sb 2Te 5 is of great significance in applications such as slow light devices and sensors.

关 键 词：超构表面 锗锑碲 高品质因子 电磁诱导透明 

分 类 号：O433.1[机械工程—光学工程]