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Proceedings Paper

Photothermal nano-cavities for ultra-sensitive chem-bio detection
Author(s): Juejun Hu; J. David Musgrave; Nathan Carlie; Anu Agarwal; Kathleen Richardson; Lionel C. Kimerling
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Paper Abstract

Nano-cavity photothermal spectroscopy is a novel technique for ultra-sensitive chem-bio detection. We illustrate that through simultaneous localization of optical and thermal interactions in a planar nano-cavity, detection sensitivity can be improved by > 104 compared to state-of-the-art. Key to nano-cavity photothermal sensing is the use of novel infraredtransparent chalcogenide glasses for resonant cavity fabrication, as these glasses feature a photothermal figure-of-merit over two orders of magnitude higher than conventional materials. We demonstrate planar optical resonant cavity devices in these glasses with record cavity quality factors up to 5 × 105, leading to high photothermal detection sensitivity.

Paper Details

Date Published: 3 June 2011
PDF: 8 pages
Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 80180W (3 June 2011); doi: 10.1117/12.883123
Show Author Affiliations
Juejun Hu, Univ. of Delaware (United States)
J. David Musgrave, Clemson Univ. (United States)
Nathan Carlie, Clemson Univ. (United States)
Anu Agarwal, Massachusetts Institute of Technology (United States)
Kathleen Richardson, Clemson Univ. (United States)
Lionel C. Kimerling, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 8018:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
Augustus W. Fountain III; Patrick J. Gardner, Editor(s)

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