8 March 2014 Comparative sensitivity analysis of integrated optical waveguides for near-infrared volatile organic compounds with 1ppb detection
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Proceedings Volume 8990, Silicon Photonics IX; 89900Z (2014) https://doi.org/10.1117/12.2040579
Event: SPIE OPTO, 2014, San Francisco, California, United States
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.
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Wei-Cheng Lai, Wei-Cheng Lai, Yi Zou, Yi Zou, Swapnajit Chakravarty, Swapnajit Chakravarty, Liang Zhu, Liang Zhu, Ray T. Chen, Ray T. Chen, } "Comparative sensitivity analysis of integrated optical waveguides for near-infrared volatile organic compounds with 1ppb detection", Proc. SPIE 8990, Silicon Photonics IX, 89900Z (8 March 2014); doi: 10.1117/12.2040579; https://doi.org/10.1117/12.2040579
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