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Proceedings Paper

Photothermal interferometric NIR detection using sol gel materials
Author(s): Larry W. Burggraf; Guanming Li
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Paper Abstract

Photothermal detection methods use the light-absorbing sample material as the sensor transducer. Photothermal displacement methods using interferometric detection will be used to measure environmental analytes particularly if those analytes can be incorporated into the sensor probe. We are using various nanoporous optical sol-gel materials in sensor probes for photothermal detection. Photothermal sensors made using sol-gel materials have advantages for infrared and near infrared photothermal in situ detection including improved sensitivity, lower limits of detection, easier miniaturization, and room-temperature operation. The potential for photothermal interferometric near infrared detection of organophosphorous compounds adsorbed in silica sol-gel is demonstrated.

Paper Details

Date Published: 23 July 1997
PDF: 8 pages
Proc. SPIE 3082, Electro-Optical Technology for Remote Chemical Detection and Identification II, (23 July 1997); doi: 10.1117/12.280932
Show Author Affiliations
Larry W. Burggraf, Air Force Institute of Technology (United States)
Guanming Li, Air Force Institute of Technology (United States)


Published in SPIE Proceedings Vol. 3082:
Electro-Optical Technology for Remote Chemical Detection and Identification II
Mahmoud Fallahi; Ellen A. Howden, Editor(s)

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