High sensitivity gas sensor based on high-Q suspended polymer photonic crystal nanocavity

Hannah Clevenson; Pierre Desjardins; Xuetao Gan; Dirk Englund

doi:10.1063/1.4879735

High sensitivity gas sensor based on high-Q suspended polymer photonic crystal nanocavity

Hannah Clevenson, Pierre Desjardins, Xuetao Gan, Dirk Englund

Massachusetts Institute of Technology

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

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 10⁴, 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.

Original language	English
Article number	241108
Journal	Applied Physics Letters
Volume	104
Issue number	24
DOIs	https://doi.org/10.1063/1.4879735
State	Published - 16 Jun 2014
Externally published	Yes

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title = "High sensitivity gas sensor based on high-Q suspended polymer photonic crystal nanocavity",

abstract = "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 104, 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.",

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High sensitivity gas sensor based on high-Q suspended polymer photonic crystal nanocavity

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