摘要
提出了一种基于H形金属狭缝阵列的新型结构。利用该结构形成的法布里-珀罗腔(Fabry-Perot,F-P)来加强表面等离激元的耦合作用,以获得一种双共振反射现象;同时研究了基于该现象的折射率传感特性。采用时域有限差分法研究了该结构中狭缝长度、宽度、金膜厚度等参数对双共振反射现象的影响。研究发现,双共振谷波长可由以上主要参数有效调控,当竖直狭缝长度为150nm、水平狭缝长度为200nm、狭缝宽度为50nm、金膜厚度为300nm时,该结构具有较好的双共振反射现象,其灵敏度分别为590和1 199nm/RIU。该发现为新一代高性能表面等离子共振传感器设计提供了理论参考。
A novel structure based on H-shaped metal slits array is proposed in this paper.The Fabry-Perot cavity formed by the structure is used to strengthen the coupling effect of the surface plasmon polariton to obtain a phenomenon of two resonance reflections.And also the refractive index sensing characteristics based on this phenomenon were studied.The influence of length and width of slit and thickness of gold film on the two-resonance reflection was studied with the method of finite difference time domain.It is found that the wavelengths of the two resonance dips can be effectively controlled by the above parameters.When the length of the vertical slits is 150 nm,the length of the horizontal slit is 200 nm,the width of the slits is 50 nm,and the thickness of the gold film is 300 nm,the structure has a good phenomenon of two resonance reflections,and its sensitivity is 590 and 1 199 nm/RIU,respectively.The discovery can provide a theoretical reference for the design of a new generation of high-performance surface plasmon resonance sensors.
作者
肖功利
韦清臣
杨宏艳
徐俊林
杨秀华
窦婉滢
李海鸥
陈永和
傅涛
李琦
XIAO Gongli;WEI Qingchen;YANG Hongyan;XU Junlin;YANG Xiuhua;DOU Wanying;LI Haiou;CHEN Yonghe;FU Tao;LI Qi(Guangxi Key Lab.of Precision Navigation Technol.and Appl.,Guilin University of Electron.Technol.,Guilin 541004,CHN;Guangxi Experiment Center of Information Science,Guilin University of Electron.Technol.,Guilin 541004,CHN;School of Electron.Engin.and Automation,Guilin University of Electron.Technol.,Guilin 541004,CHN)
出处
《半导体光电》
CAS
北大核心
2019年第2期220-225,共6页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(61465004
61765004)
广西自然科学基金项目(2017GXNSFAA198164
2016GXNSFAA380006)
桂林电子科技大学研究生教育创新计划项目(2017YJCX41)
广西精密导航技术与应用重点实验室项目(DH201804
DH201703)
关键词
表面等离激元
金属狭缝阵列
双共振谷
折射率传感特性
surface plasmon polariton
metal slit arrays
two resonance dips
refractive index sensing property
