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Photothermal deflection spectroscopy and detection

Journal Article · · Appl. Opt.; (United States)
DOI:https://doi.org/10.1364/AO.20.001333· OSTI ID:6506834
The theory for a sensitive spectroscopy based on the photothermal deflection of a laser beam is developed. We consider cw and pulsed cases of both transverse and collinear photothermal deflection spectroscopy for solids, liquids, gases, and thin films. The predictions of the theory are experimentally verified, its implications for imaging and microscopy are given, and the sources of noise are analyzed. The sensitivity and versatility of photothermal deflection spectroscopy are compared with thermal lensing and photoacoustic spectroscopy.
Research Organization:
University of California, Lawrence Berkeley Laboratory, Applied Physics and Laser Spectroscopy Group, Berkeley, California 94720
OSTI ID:
6506834
Journal Information:
Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 20:8; ISSN APOPA
Country of Publication:
United States
Language:
English

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