Abstract
Photoacoustic spectroscopy is a method for directly measuring the absorption properties of gases and condensed matter. We have developed a photoacoustic gas cell for a rapid-scan Fourier spectrometer. With this cell we can extend the spectral range down to 180 cm−1; more than one octave lower than previously reported useful broadband measurements. The photoacoustic spectrum of a microscope cover glass was measured from 180 ... 200 cm−1 and normalized with respect to the spectrum of carbon black as a reference material. Starting from the one-dimensional equation of heat conduction we derived an expression for the surface temperature of single and double-layer samples. We calculated the surface temperature of the glass lamella and divided it by the corresponding values for carbon black using the thermal conductivity of carbon black as a fitting parameter. We show that the one-dimensional model calculation reproduces the experimental spectrum over the whole spectral range.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
A.Rosencwaig, A. Gersho: J. Appl. Phys.47, 64 (1976)
P. Hess, J. Pelzl: Springer Ser. Opt. Sci. vol.58 (Springer, Berlin, Heidelberg 1988)
G. Busse, B. Bullemer: Infrared Phys.18, 631 (1978)
S. Perkowitz, G. Busse, in:Electromagnetic Waves in Matter, Vol. 16, Part III (Academic, London 1986)
M.A. Afromowitz, P.S. Yeh, S. Yee: J. Appl. Phys.48, 209 (1977)
P. Grosse:Freie Elektronen in Festkörpern (Springer, Berlin, Heidelberg, New York 1979), p. 248
B. Harbecke: Appl. Phys. B39, 165 (1986)
P. Grosse, B. Harbecke, B. Heinz, R. Meyer, M. Offenberg: Appl. Phys. A39, 257 (1986)