Surface-to-Bulk Optical Absorption on Uncoated Sapphire and Zinc Selenide Using Photoacoustic Chopping Frequency Studies

NC Fernelius

doi:10.1520/STP37235S

SYMPOSIA PAPER Published: 01 January 1983

STP37235S

Surface-to-Bulk Optical Absorption on Uncoated Sapphire and Zinc Selenide Using Photoacoustic Chopping Frequency Studies

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Experimental photoacoustic (PA) signal amplitude and phase angle data were taken on uncoated CVD ZnSe at 10.6 μm and on (0001) oriented single crystal sapphire (Al₂O₃) at 1.3 μm. The data were interpreted using the Rosencwaig-Gersho theory, the McDonald-Wetsel composite-piston model and the Bennett-Forman theory. A modified version of the Rosencwaig-Gersho theory was developed which explicitly incorporates surface absorption. It was also applied to these cases. Comparisons are made with some multithickness sample studies on related materials.

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Fernelius, NC

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Details

Developed by Committee: F01

Pages: 129–141

DOI: 10.1520/STP37235S

ISBN-EB: 978-0-8031-4865-9

ISBN-13: 978-0-8031-0708-3

Surface-to-Bulk Optical Absorption on Uncoated Sapphire and Zinc Selenide Using Photoacoustic Chopping Frequency Studies

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