Journal
OPTICS LETTERS
Volume 38, Issue 19, Pages 3799-3802Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.38.003799
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Funding
- NSF [IIP-1127251]
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1127251] Funding Source: National Science Foundation
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We experimentally demonstrate simultaneous selective detection of xylene and trichloroethylene (TCE) using multiplexed photonic crystal waveguides (PCWs) by near-infrared optical absorption spectroscopy on a chip. Based on the slow light effect of photonic crystal structure, the sensitivity of our device is enhanced to 1 ppb (v/v) for xylene and 10 ppb (v/v) for TCE in water. Multiplexing is enabled by multimode interference power splitters and Y-combiners that integrate multiple PCWs on a silicon chip in a silicon-on-insulator platform. (C) 2013 Optical Society of America
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