Hybrid plasmonic biosensor for simultaneous measurement of both thickness and refractive index

被引：7

作者：

Ma, Youqiao ^{[1
]}

Farrell, Gerald ^{[1
]}

Semenova, Yuliya ^{[1
]}

Chan, Hau Ping ^{[2
]}

Wu, Qiang ^{[1
]}

机构：

[1] Dublin Inst Technol, Photon Res Ctr, Sch Elect & Commun Engn, Dublin 8, Ireland

[2] City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China

来源：

INFRARED PHYSICS & TECHNOLOGY | 2013年 / 60卷

基金：

爱尔兰科学基金会;

关键词：

Surface plasmon polaritons (SPPs); Refractive index sensing; Hybrid plasmonics biosensor; GRATINGS; SURFACE;

D O I：

10.1016/j.infrared.2013.04.001

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A novel hybrid plasmonic biosensor using a sub-wavelength reflection metal grating is proposed and analyzed. The simulation results show that the hybrid plasmonic-cavity (HPCM) are wavelength dependent on both the refractive index (RI) and thickness of the surrounding analyte layer, with a sensitivity of 448 nm/RIU (refractive index unit) and 75 nm/mu m, respectively. However wavelength related to the cavity resonant mode (CRM) is only sensitive to the environmental refractive index changes. In principle it is possible to determine both RI and thickness of the coating layer simultaneously. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：134 / 136

页数：3

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