基于四聚体结构实现对光开关的控制研究  

Research on control of optical switch based on tetramer structure

作　　者：牛庆丽[1] 朱耀琴 NIU Qingli;ZHU Yaoqin(School of Information Engineering,Zhengzhou University of Science and Technology,Zhengzhou 450064,China;School of Computer Science and Engineering,Nanjing University of Science&Technology,Nanjing 210014,China)

机构地区：[1]郑州科技学院信息工程学院,河南郑州450064 [2]南京理工大学计算机科学与工程学院,江苏南京210014

出　　处：《传感器与微系统》2023年第3期40-44,共5页Transducer and Microsystem Technologies

基　　金：河南省教育厅高等学校重点项目(16A120017)。

摘　　要：提出了一种由4个纳米棒组成的类似矩形的四聚体结构,这种结构可通过偏振角的变化实现对光开关的控制。利用有限元法对偏振角为0°和90°时的透射谱、电场及电荷分布进行了分析与研究。研究表明,设计的这种四聚体结构的透射光谱对偏振角的变化相当敏感,一旦偏振角发生90°的变化即可实现该结构对光开关的控制,且开关比可高达27.81 dB。该结构的开关效应主要是不同的偏振态导致横竖纳米棒具有不同的耦合强度。然后,又对不同的结构周期和参数对透射特性的影响进行了研究。研究表明,光开关的响应特性均可通过改变结构单元周期、d_(1)、l_(1)、l_(2)完成调节。研究结果为制造高性能的纳米光开关提供了非常重要的理论依据。A rectangular like tetramer structure composed of four nanorods is proposed, which can control the optical switch by changing the polarization angle.The transmission spectrum, electric field and charge distribution with polarization angles of 0° and 90° are analyzed and studied by finite element method.The results show that the transmission spectrum of the designed tetramer structure is very sensitive to the change of polarization angle.Once the polarization angle changes by 90°,the structure can control the optical switch, and the switch ratio can be as high as 27.81 dB.The switching effect of the structure is mainly due to the different polarization states which lead to the different coupling strength of the horizontal and vertical nanorods.Then the effects of different structural periods and parameters on the transmission characteristics are studied.The results show that the response characteristics of the optical switch can be adjusted by changing the structure unit period, d_(1),l_(1) and l_(2).The research results provide a very important theoretical basis for the manufacture of high-performance nano optical switches.

关 键 词：光开关 偏振角 有限元分析 亚波长结构 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] O436[自动化与计算机技术—控制科学与工程]