Au nanorod-coupled microfiber optical humidity sensors

被引：23

作者：

Zhou, N. ^{[1
]}

Wang, P. ^{[2
,3
]}

Shi, Z. X. ^{[1
]}

Gao, Y. X. ^{[1
]}

Yang, Y. X. ^{[1
]}

Wang, Y. P. ^{[4
]}

Xie, Y. ^{[1
]}

Cai, D. W. ^{[1
]}

Guo, X. ^{[1
]}

Zhang, L. ^{[1
]}

Qiu, J. R. ^{[1
]}

Tong, L. M. ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

[2] Kings Coll London, Dept Phys, London WC2R 2LS, England

[3] Kings Coll London, London Ctr Nanotechnol, London WC2R 2LS, England

[4] Univ Michigan, Dept Elect & Comp Engn, Ann Arbor, MI 48109 USA

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 06期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

LOOP RESONATOR; KNOT RESONATOR;

D O I：

10.1364/OE.27.008180

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a high-sensitivity relative humidity (RH) sensor taking advantage of single-band narrow plasmon resonance of a single Au nanorod coupled to a whispering gallery cavity mode of a polyacrylamide microfiber. From the resonance peak shift, the sensor could achieve a sensitivity up to 0.51 nm/% RH with a cavity size of about 2 mu m. By coupling multiple Au nanorods along the microfiber axis, we demonstrate a position dependent microfiber optical humidity sensor with a 1 5-mm spatial resolution, which can be potentially reduced to micrometer level, paving a way toward high-resolution distributed microfiber optical sensors. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：8180 / 8185

页数：6

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