Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 36, Issue 10, Pages 2907-2912Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.36.002907
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Funding
- Directorate for Education and Human Resources [1719379, 1744502, 1831332]
- National Science Foundation (NSF)
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This contribution introduces a pump-probe photothermal mirror Z-scan method to measure the thermal quantum yield, the thermal diffusivity, and other photothermal parameters of an opaque solid. The focusing of a pump beam of light onto the sample generates thermoelastic surface distortions. The distorted surface acts as a mirror affecting the diffraction pattern of a reflected probe beam yielding the experimental signal. Scanning the focusing lens produces a single peak photothermal mirror Z-scan signature. The amplitude and time evolution of the signal determines the sample's photothermal properties. The method is used to analyze gallium arsenide and silicon plates, obtaining good agreement with previous studies. (C) 2019 Optical Society of America.
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