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Updated: May 2, 2026

$Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing$

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing

Published on: March 13, 2013

Trace gas absorption spectroscopy using functionalized microring resonators.

Todd H Stievater, Marcel W Pruessner, Doewon Park

|February 25, 2014

Summary

This summary is machine-generated.

We developed a new method using silicon nitride microring resonators to detect trace gases at parts-per-billion levels. This technique analyzes absorption spectra to identify toxic vapors, advancing environmental and safety monitoring.

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Last Updated: May 2, 2026

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Area of Science:

Chemical Sensing
Spectroscopy
Materials Science

Background:

Trace gas detection is crucial for environmental monitoring and safety.
Existing methods often lack sensitivity or require complex instrumentation.
Evanescent-field spectroscopy offers high sensitivity for molecular detection.

Purpose of the Study:

To develop a highly sensitive method for detecting trace gases.
To utilize silicon nitride microring resonators for gas sensing.
To analyze differential absorption spectra for toxic vapor identification.

Main Methods:

Coating silicon nitride microring resonators with functionalized sorbent polymers.
Employing evanescent-field absorption spectroscopy.
Analyzing microring resonance line shapes to obtain differential absorption spectra.

Main Results:

Detection of trace gases at parts-per-billion levels achieved.
Differential absorption spectra of vapor-phase analytes successfully measured.
Near-infrared overtone of OH-stretch resonance used for spectral analysis.

Conclusions:

Silicon nitride microring resonators are effective platforms for sensitive trace gas detection.
The method provides spectral information indicative of analyte vapor toxicity.
This technique offers a promising approach for real-time toxic vapor monitoring.