Liquid whispering-gallery-mode resonator as a humidity sensor

被引：47

作者：

Labrador-Paez, Lucia ^{[1
,2
]}

Soler-Carracedo, Kevin ^{[1
]}

Hernandez-Rodriguez, Miguel ^{[1
]}

Martin, Inocencio R. ^{[1
,3
,4
]}

Carmon, Tal ^{[5
]}

Martin, Leopoldo L. ^{[5
,6
]}

机构：

[1] Univ La Laguna, Dept Fis, San Cristobal la Laguna 38206, Sc Tenerife, Spain

[2] Univ Autonoma Madrid, Dept Fis Mat, Fluorescence Imaging Grp, E-28049 Madrid, Spain

[3] Univ La Laguna, MALTA Consolider Team, San Cristobal la Laguna 38200, Sc Tenerife, Spain

[4] Univ La Laguna, IMN, San Cristobal la Laguna 38200, Sc Tenerife, Spain

[5] Technion Israel Inst Technol, Mech Engn, IL-32000 Haifa, Israel

[6] Fdn Galileo Galilei INAF, Rambla Jose Ana Fernandez Perez 7, Brena Baja 38712, Sc Tenerife, Spain

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 02期

关键词：

DIELECTRIC SPHERES; GLASS MICROSPHERE; RESONANCES; PRESSURE;

D O I：

10.1364/OE.25.001165

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally demonstrate the high sensitivity of a novel liquid state, whispering-gallery-mode optical resonator to humidity changes. The optical resonator used consists of a droplet made of glycerol, a transparent liquid that enables high optical quality factor, doped with fluorescent material. As glycerol is highly hygroscopic, the refractive index and radius of the droplet change with ambient humidity. This produces a shift on the whispering gallery mode's wavelengths, which modulates the emission of the fluorescent material. This device shows an unpreceded sensitivity of 10(-3) per relative humidity percent. (C) 2017 Optical Society of America

引用

页码：1165 / 1172

页数：8

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