Photothermal nano-cavities for ultra-sensitive chem-bio detection

Juejun Hu; J. David Musgrave; Nathan Carlie; Anu Agarwal; Kathleen Richardson; Lionel C. Kimerling

doi:10.1117/12.883123

3 June 2011 Photothermal nano-cavities for ultra-sensitive chem-bio detection

Juejun Hu, J. David Musgrave, Nathan Carlie, Anu Agarwal, Kathleen Richardson, Lionel C. Kimerling

Proceedings Volume 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII; 80180W (2011) https://doi.org/10.1117/12.883123
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

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.

Citation Download Citation

Juejun Hu, J. David Musgrave, Nathan Carlie, Anu Agarwal, Kathleen Richardson, and Lionel C. Kimerling "Photothermal nano-cavities for ultra-sensitive chem-bio detection", Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 80180W (3 June 2011); https://doi.org/10.1117/12.883123

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