Direct Sensing in Liquids Using Whispering-Gallery-Mode Droplet Resonators

被引：68

作者：

Avino, Saverio ^{[1
]}

Krause, Anika ^{[1
]}

Zullo, Rosa ^{[1
]}

Giorgini, Antonio ^{[1
]}

Malara, Pietro ^{[1
]}

De Natale, Paolo ^{[2
]}

Loock, Hans Peter ^{[3
]}

Gagliardi, Gianluca ^{[1
]}

机构：

[1] CNR, INO, I-80078 Naples, Italy

[2] CNR, INO, I-50125 Florence, Italy

[3] Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada

来源：

ADVANCED OPTICAL MATERIALS | 2014年 / 2卷 / 12期

关键词：

OPTICAL RESONATORS;

D O I：

10.1002/adom.201400322

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Liquid droplets suspended by the tip of a thin wire, a glass capillary, or a needle form high-Q optical resonators, thanks to surface tension. Under gravity equilibrium conditions, the maximum drop diameter is approximately 1.5 mm for paraffin oil (volume similar to 0.5 mu L) using, for instance, a silica fiber with 250 mu m thickness. Whispering gallery modes are excited by a free-space near-infrared laser that is frequency locked to the cavity resonance. The droplet cavity serves as a miniature laboratory for sensing of chemical species and particles.

引用

页码：1155 / 1159

页数：5

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