Ultra wide sensing range plasmonic refractive index sensor based on nano-array with rhombus particles

作     者：Jiankai Zhu Xiangxian Wang Xiaoxiong Wu Yingwen Su Yueqi Xu Yunping Qi Liping Zhang Hua Yang 朱剑凯;王向贤;吴枭雄;苏盈文;徐月奇;祁云平;张丽萍;杨华

作者机构：School of ScienceLanzhou University of TechnologyLanzhou 730050China College of Physics and Electronic EngineeringNorthwest Normal UniversityLanzhou 730070China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2020年第29卷第11期

页      面：330-335页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61865008 and 61505074) the HongLiu First-Class Disciplines Development Program of Lanzhou University of Technology 

主　　题：plasmonic sensor refractive index sensitivity figure of merit(FOM) 

摘      要：We propose a two-dimensional metal grating with rhombus particles on a gold film structure for refractive index sensing due to its perfect absorption at near-infrared *** two-dimensional metal grating coupling,the incident light energy is effectively transformed into the surface plasmons which propagate along the upper surface of the gold film and interact with the surrounding environment in a wide *** plasmonic resonance mechanism of the structure is discussed in detail by theoretical analysis and finite-difference time-domain *** optimizing the geometrical parameters,the designed structure shows the sensing performance with a refractive index sensitivity of 1006 nm/*** importantly,this plasmonic refractive index sensor achieves an ultra wide refractive index sensing range from 1.0 to 2.4 with a stable sensing *** promising simulation results of the structure show that the sensor has a broad application prospect in the field of biology and chemistry.