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.
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Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States)
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Berkeley, California
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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.
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Jackson, W.; Amer, Nabil M.; Boccara, A. C. & Fournier, D.PHOTOTHERMAL DEFLECTION SPECTROSCOPY AND DETECTION,
article,
September 1, 1980;
Berkeley, California.
(https://digital.library.unt.edu/ark:/67531/metadc827884/:
accessed June 12, 2025),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.
