Journal ArticleDOI
Theory of the photoacoustic effect with solids
Allan Rosencwaig,Allen Gersho +1 more
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TLDR
In this article, a quantitative derivation for the acoustic signal in a photoacoustic cell in terms of the optical, thermal, and geometric parameters of the system is presented. And the theory predicts the dependence of the signal on the absorption coefficient of the solid, thereby giving a theoretical foundation for the technique of photoacoustical spectroscopy.Abstract:
When chopped light impinges on a solid in an enclosed cell, an acoustic signal is produced within the cell. This effect is the basis of a new spectroscopic technique for the study of solid and semisolid matter. A quantitative derivation is presented for the acoustic signal in a photoacoustic cell in terms of the optical, thermal, and geometric parameters of the system. The theory predicts the dependence of the signal on the absorption coefficient of the solid, thereby giving a theoretical foundation for the technique of photoacoustic spectroscopy. In particular, the theory accounts for the experimental observation that with this technique optical absorption spectra can be obtained for materials that are optically opaque.read more
Citations
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Journal ArticleDOI
Helmholtz Resonances in Photoacoustic Experiment with Laser-Sintered Polyamide Including Thermal Memory of Samples
M. Popovic,Mioljub V. Nešić,Snežana Ćirić-Kostić,Milos Zivanov,Dragan D. Markushev,Mihailo D. Rabasović,Slobodanka Galović +6 more
TL;DR: In this paper, a minimum volume photoacoustic (PA) cell, employed as an acoustic resonator, is presented and a model of the PA cell transfer function, as a combination of two Helmholtz resonators, is derived.
Book ChapterDOI
Graphitic Carbon in Urban Environments and the Arctic
TL;DR: In this paper, the application of Raman scattering, photoacoustic, optical attenuation, opticothermal analysis, and solvent extraction techniques to the characterization of the graphitic component of urban and remote aerosols is described.
Journal ArticleDOI
Characterization of edible coatings and microorganisms on food surfaces using Fourier transform infrared photoacoustic spectroscopy
TL;DR: In this article, Fourier transform infrared photoacoustic spectroscopy (FT-IR/PAS) was used to study edible coatings and microorganisms on fruit surfaces (apple and honeydew melon).
Journal ArticleDOI
Effect of plasma hydrogenation on the defect properties of CuInSe2 single crystals
M. V. Yakushev,A. Zegadi,H. Neumann,Philip A. Jones,Arthur E. Hill,Richard D. Pilkington,M. A. Slifkin,R. D. Tomlinson +7 more
TL;DR: The defect properties of p-type CuInSe2 single crystals hydrogenated by diffusion from a plasma source are investigated using the Rutherford backscattering/channeling technique and photoacoustic spectroscopy.
References
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Journal ArticleDOI
LXVIII. Upon the production of sound by radiant energy
TL;DR: The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science: Vol. 11, No. 71, pp. 510-528 as mentioned in this paper discusses the production of sound by radiant energy.
Journal ArticleDOI
Photoacoustic spectroscopy of solids
TL;DR: In this article, the opto- or photo-acoustic effect used in gas analysis has been extended to the study of solids, providing a simple method for obtaining information about optical absorptions and subsequent de-excitations in solids.
Journal ArticleDOI
Photoacoustic spectroscopy of biological materials.
TL;DR: In this paper, a new technique for performing optical spectroscopy on solids has been developed Photoacoustic spectra of cytochrome c and hemoglobin show how this technique can be used to obtain information about optical absorptions and subsequent deexcitations in solid biological materials, particularly those which cannot readily be studied by conventional means.