Cavity-enhanced on-chip absorption spectroscopy using microring resonators

被引：193

作者：

Nitkowski, Arthur ^{[2
]}

Chen, Long ^{[1
]}

Lipson, Michal ^{[1
]}

机构：

[1] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA

[2] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 16期

关键词：

D O I：

10.1364/OE.16.011930

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate on-chip laser absorption spectroscopy using silicon microring resonators integrated with PDMS microfluidic channels. A 100 mu m radius microring resonator with Q > 100,000 is used to enhance the interaction length between evanescent light and a cladding liquid. We measure absorption spectra of less than 2 nL of N-methylaniline from 1460 nm to 1610 nm with 1 nm resolution and effective free space path lengths up to 5 mm. This work can help realize a completely on-chip spectroscopy device for lab-on-a-chip applications. (C) 2008 Optical Society of America.

引用

页码：11930 / 11936

页数：7

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