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Proceedings Paper

Comparative sensitivity analysis of integrated optical waveguides for near-infrared volatile organic compounds with 1ppb detection
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Paper Abstract

We compared different on-chip silicon waveguide based absorption sensors for the detection of xylene in water in nearinfrared with detection limit down to 1ppb. Strip waveguide, slot waveguide and PC-based chip integrated optical absorption spectroscopy devices are compared in near-infrared. PCW utilizes slow light effect to enhance absorbance and is most sensitive while slot waveguide strengthens light-matter interaction in a narrow low index slot by a factor up to 10 and performs better than a strip waveguide. The results provide a route for enhanced sensitivity via absorption spectroscopy while retaining device miniaturization.

Paper Details

Date Published: 8 March 2014
PDF: 6 pages
Proc. SPIE 8990, Silicon Photonics IX, 89900Z (8 March 2014); doi: 10.1117/12.2040579
Show Author Affiliations
Wei-Cheng Lai, The Univ. of Texas at Austin (United States)
Yi Zou, The Univ. of Texas at Austin (United States)
Swapnajit Chakravarty, Omega Optics, Inc. (United States)
Liang Zhu, The Univ. of Texas at Austin (United States)
Ray T. Chen, The Univ. of Texas at Austin (United States)
Omega Optics, Inc. (United States)

Published in SPIE Proceedings Vol. 8990:
Silicon Photonics IX
Joel Kubby; Graham T. Reed, Editor(s)

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