期刊
APPLIED PHYSICS LETTERS
卷 104, 期 24, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4879735
关键词
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资金
- Air Force Office of Scientific Research PECASE
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- NASA Office of the Chief Technologist's Space Technology Research Fellowship
We present high-sensitivity, multi-use optical gas sensors based on a one-dimensional photonic crystal cavity. These devices are implemented in versatile, flexible polymer materials which swell when in contact with a target gas, causing a measurable cavity length change. This change causes a shift in the cavity resonance, allowing precision measurements of gas concentration. We demonstrate suspended polymer nanocavity sensors and the recovery of sensors after the removal of stimulant gas from the system. With a measured quality factor exceeding 10(4), we show measurements of gas concentration as low as 600 parts per million (ppm) and an experimental sensitivity of 10 ppm; furthermore, we predict detection levels in the parts-per-billion range for a variety of gases. (C) 2014 AIP Publishing LLC.
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