Frequency domain photopyroelectric effect spectrometry (FD‐PPES) is a recent spectroscopic technique that may be used to recover depth profiles of optical absorption in thin films on a noncontact and nondestructive basis. In this work a series of well characterized thermally homogeneous samples were prepared that exhibited continuous or discrete subsurface profiles of optical absorption. Multifrequency FD‐PPES measurements made on these samples were compared to theory using a heat transfer model, whi…
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