Abstract
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.
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