Chopping Frequency Variation of Photoacoustic Amplitude from Porous Silicon

We investigated the possibility of applying photoacoustic (PA) spectroscopy to the study of luminescent porous silicon. Since porous silicon is usually formed on a silicon substrate, PA spectroscopy is useful for obtaining the absorption coefficient of porous silicon without removing the substrate....

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2000, Vol.39 (2R), p.448
Main Authors: Ohmukai, Masato, Tsutsumi, Yasuo
Format: Article
Language:English
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Summary:We investigated the possibility of applying photoacoustic (PA) spectroscopy to the study of luminescent porous silicon. Since porous silicon is usually formed on a silicon substrate, PA spectroscopy is useful for obtaining the absorption coefficient of porous silicon without removing the substrate. In this article, we investigated the chopping frequency dependence of the PA signal from porous silicon and showed that the chopping frequency is critical for the exclusion of the PA signal from silicon substrate.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.39.448