Integrated optical microcavities for enhanced evanescent-wave spectroscopy

被引：65

作者：

Krioukov, E

Klunder, DJW

Driessen, A

Greve, J

Otto, C

机构：

[1] Univ Twente, Res Inst, MESA, Dept Appl Phys,Biophys Tech Grp, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, Res Inst, MESA, Dept Appl Phys,Lightwave Devices Grp, NL-7500 AE Enschede, Netherlands

来源：

OPTICS LETTERS | 2002年 / 27卷 / 17期

关键词：

D O I：

10.1364/OL.27.001504

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The use of integrated optical microcavities (MCs) for enhanced optical spectroscopy and sensing is investigated. The MC sustains high-Q whispering-gallery modes, in which the energy of the optical field can be efficiently stored. The resulting enhanced field can be used to probe fluorescent molecules in the cladding of the MC, Enhanced fluorescence excitation with an integrated optical MC is demonstrated experimentally for what is believed to be the first time. A comparison between a MC and a straight waveguide shows that the MC may give an increase of 40 times in fluorescence excitation. Because of the ultrasmall size of the MC (15 mum in radius), the fluorescence signal may be observed from only 20 molecules in the cladding. (C) 2002 Optical Society of America.

引用

收藏

页码：1504 / 1506

页数：3

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