Appl. Phys. Lett. 43, 160 (1983).

A novel technique for enhancing photoacoustic signals from solids.

Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India.

(Received 9 February 1983; accepted 9 May 1983)

Enhancement of the photoacoustic signal from condensed materials by several folds is achieved by the introduction of a liquid with high vapor pressure in the photoacoustic cell. The enhancement is especially marked for low absorption coefficients and high chopping frequencies. Typically the enhancement is two to nine times in the presence of diethyl ether at 293 K. A linear relationship is observed between the enhancement and the vapor pressure of the liquid.

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