Experimental demonstration of surface plasmon resonance enhancement of the tapered optical fiber coated with Au/Ti thin film

被引：12

作者：

Ju, Seongmin ^{[1
]}

Jeong, Seongmook ^{[1
]}

Kim, Youngwoong ^{[1
]}

Jeon, Poram ^{[1
]}

Park, Min-Su ^{[1
]}

Jeong, Hyejeong ^{[2
]}

Boo, Seongjae ^{[2
]}

Jang, Jae-Hyung ^{[1
]}

Han, Won-Taek ^{[1
]}

机构：

[1] Gwangju Inst Sci & Technol, Dept Photon & Appl Phys, Sch Informat & Commun, Kwangju 500712, South Korea

[2] Korea Inst Ind Technol, Solar City Ctr, Kwangju 500480, South Korea

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2014年 / 383卷

基金：

新加坡国家研究基金会;

关键词：

Optical fiber; Sensor; Fiber tapering; Absorption; Surface plasmon resonance; SENSOR; SENSITIVITY; SYSTEM;

D O I：

10.1016/j.jnoncrysol.2013.05.005

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dependence of taper angle of the surface plasmon resonance (SPR)-based fiber optic sensor on the SPR absorption and sensitivity was investigated. The SPR wavelength was found to increase from 700 nm to 1200 nm with the increase of the refractive index of the surrounding oils from 1.404 to 1.434. The SPR sensitivity increased with the increase of metal-coated taper angle (Omega) from 0.07 degrees to 1.86 degrees by changing the down/up tapering length or waist diameter. The absorption intensity of the SPR spectrum was found to decrease and the FWHM was broadened with the increase of refractive index of the index matching oils (n = 1.404-1.434) due to the leakage of the power fraction of guided rays into the surrounding medium and the spatial spreading and scattering of the conduction electrons, respectively. (C) 2013 Published by Elsevier B.V.

引用

页码：146 / 152

页数：7

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