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Title: On-chip spectroscopy with thermally tuned high-Q photonic crystal cavities

Spectroscopic methods are a sensitive way to determine the chemical composition of potentially hazardous materials. Here, we demonstrate that thermally tuned high-Q photonic crystal cavities can be used as a compact high-resolution on-chip spectrometer. We have used such a chip-scale spectrometer to measure the absorption spectra of both acetylene and hydrogen cyanide in the 1550 nm spectral band and show that we can discriminate between the two chemical species even though the two materials have spectral features in the same spectral region. Our results pave the way for the development of chip-size chemical sensors that can detect toxic substances.
Authors:
; ;  [1] ;  [2] ;  [1] ;  [3]
  1. The Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)
  2. Department of Physics, University of South Florida, Tampa, Florida 33620 (United States)
  3. (Canada)
Publication Date:
OSTI Identifier:
22489273
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTRA; ACETYLENE; CHEMICAL COMPOSITION; CRYSTALS; HAZARDOUS MATERIALS; HYDROGEN CYANIDES; RESOLUTION; SENSORS; SPECTROMETERS; SPECTROSCOPY; TOXICITY