Photothermal nano-cavities for ultra-sensitive chem-bio detection
Tuesday 26 April 2011- Orlando, Florida, USA Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
Main Authors: | , , , , , |
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Other Authors: | |
Format: | Article |
Language: | English |
Published: |
SPIE,
2012-08-09T15:48:31Z.
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Subjects: | |
Online Access: | Get fulltext |
Summary: | Tuesday 26 April 2011- Orlando, Florida, USA Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII 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 > 10[superscript 4] 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 × 10[superscript 5], leading to high photothermal detection sensitivity. |
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