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Photoacoustic spectroscopy

About: Photoacoustic spectroscopy is a(n) research topic. Over the lifetime, 3379 publication(s) have been published within this topic receiving 62892 citation(s).

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Journal ArticleDOI
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.

2,186 citations

Journal ArticleDOI
TL;DR: The theory for a sensitive spectroscopy based on the photothermal deflection of a laser beam is developed and its implications for imaging and microscopy are given, and the sources of noise are analyzed.
Abstract: The theory for a sensitive spectroscopy based on the photothermal deflection of a laser beam is developed. We consider cw and pulsed cases of both transverse and collinear photothermal deflection spectroscopy for solids, liquids, gases, and thin films. The predictions of the theory are experimentally verified, its implications for imaging and microscopy are given, and the sources of noise are analyzed. The sensitivity and versatility of photothermal deflection spectroscopy are compared with thermal lensing and photoacoustic spectroscopy.

1,228 citations

Journal ArticleDOI
Andrew C. Tam1
Abstract: This paper reviews the theory and applications of photoacoustic (also called optoacoustic) methods belonging to the more general area of photothermal measurement techniques. The theory covers excitation of gaseous or condensed samples with modulated continuous light beams or pulsed light beams. The applications of photoacoustic methods include spectroscopy, monitoring deexcitation processes, probing physical properties of materials, and generating mechanical motions. Several other related photothermal methods, as well as particle-acoustics and wave-acoustics methods are also described. This review complements an earlier and narrower review [Rev. Mod. Phys. 53, 517 (1981)] that is mainly concerned with sensitive detection by pulsed photoacoustic spectroscopy in condensed matter.

1,097 citations

01 Jan 1981
Abstract: The recognized leader in the modern development of the field presents both theory and applications. Begins with a historical account, covers gas-phase photoacoustic spectroscopy and detection and the theory of condensed phase photoacoustics, and provides a comprehensive survey of applications, from spectroscopy and chemistry analysis to medical applications and thermal analysis. Treats, for the first time, recent work in high-resolution gas spectroscopy, liquid studies, piezoelectric detection methods, thermal processes, depth profiling, and photoacoustic microscopy.

1,056 citations

01 Jan 1994
Abstract: Introduction to Environmental Sensing (M. Sigrist). Differential Optical Absorption Spectroscopy (DOAS) (U. Platt). Differential Absorption Lidar (DIAL) (S. Svanberg). Air Monitoring by Laser Photoacoustic Spectroscopy (M. Sigrist). The Use of Tunable Diode Laser Absorption Spectroscopy for Atmospheric Measurements (H. Schiff, et al.). Gas Measurement in the Fundamental Infrared Region (P. Hanst & S. Hanst). Matrix Isolation Spectroscopy in Atmospheric Chemistry (D. Griffith). Index.

579 citations

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