Photothermal interferometric NIR detection using sol gel materials

Larry W. Burggraf; Guanming Li

doi:10.1117/12.280932

23 July 1997 Photothermal interferometric NIR detection using sol gel materials

Larry W. Burggraf, Guanming Li

Proceedings Volume 3082, Electro-Optical Technology for Remote Chemical Detection and Identification II; (1997) https://doi.org/10.1117/12.280932
Event: AeroSense '97, 1997, Orlando, FL, United States

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.

Citation Download Citation

Larry W. Burggraf and Guanming Li "Photothermal interferometric NIR detection using sol gel materials", Proc. SPIE 3082, Electro-Optical Technology for Remote Chemical Detection and Identification II, (23 July 1997); https://doi.org/10.1117/12.280932

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