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Proceedings Paper

Approaches To Enhancing The Sensitivity Of Direct Coupled Photoacoustic Spectroscopy As Applied To Gaas
Author(s): Bruce K. Janousek; Richard C. Carscallen
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Paper Abstract

Several GaAs-piezoelectric transducer configurations have been characterized to increase the sensitivity of a direct-coupled photoacoustic spectrometer constructed to study the optical properties of GaAs. We have shown that the use of an annular-shaped transducer and the presence of a thin mirror between the GaAs and the transducer decrease spectrometer noise and allow for enhanced sensitivity through the exploitation of transducer resonances. Limitations of this technique for studying semiconductor deep levels are identified and the use of the complex modes of the transducer for studying semiconductor heterostructures is discussed.

Paper Details

Date Published: 22 April 1987
PDF: 7 pages
Proc. SPIE 0794, Modern Optical Characterization Techniques for Semiconductors and Semiconductor Devices, (22 April 1987); doi: 10.1117/12.940902
Show Author Affiliations
Bruce K. Janousek, The Aerospace Corporation (United States)
Richard C. Carscallen, The Aerospace Corporation (United States)

Published in SPIE Proceedings Vol. 0794:
Modern Optical Characterization Techniques for Semiconductors and Semiconductor Devices
Orest J. Glembocki; Fred H. Pollak; Jin-Joo Song, Editor(s)

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