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Verstraeten B, Sermeus J, Salenbien R, et al. Determination of thermoelastic material properties by differential heterodyne detection of impulsive stimulated thermal scattering. Photoacoustics. 2015;3(2):64-77doi: 10.1016/j.pacs.2015.05.001.
Verstraeten, B., Sermeus, J., Salenbien, R., Fivez, J., Shkerdin, G., & Glorieux, C. (2015). Determination of thermoelastic material properties by differential heterodyne detection of impulsive stimulated thermal scattering. Photoacoustics, 3(2), 64-77. https://doi.org/10.1016/j.pacs.2015.05.001
Verstraeten, B, et al. "Determination of thermoelastic material properties by differential heterodyne detection of impulsive stimulated thermal scattering." Photoacoustics vol. 3,2 (2015): 64-77. doi: https://doi.org/10.1016/j.pacs.2015.05.001
Verstraeten B, Sermeus J, Salenbien R, Fivez J, Shkerdin G, Glorieux C. Determination of thermoelastic material properties by differential heterodyne detection of impulsive stimulated thermal scattering. Photoacoustics. 2015 Jun 06;3(2):64-77. doi: 10.1016/j.pacs.2015.05.001. eCollection 2015 Jun. PMID: 26236643; PMCID: PMC4519808.
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Photoacoustics. 2015 Jun 06;3(2):64-77. doi: 10.1016/j.pacs.2015.05.001. eCollection 2015 Jun.

Determination of thermoelastic material properties by differential heterodyne detection of impulsive stimulated thermal scattering.

Photoacoustics

B Verstraeten, J Sermeus, R Salenbien, J Fivez, G Shkerdin, C Glorieux

Affiliations

  1. Laboratory of Acoustics and Thermal Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Heverlee, Belgium.
  2. KU Leuven, Campus Brussels, Warmoesberg 26, B-1000 Brussels, Belgium.
  3. Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, Vvedensky sq., 1, Fryazino, Moscow Region, Russia.

PMID: 26236643 PMCID: PMC4519808 DOI: 10.1016/j.pacs.2015.05.001

Abstract

The underlying working principle of detecting impulsive stimulated scattering signals in a differential configuration of heterodyne diffraction detection is unraveled by involving optical scattering theory. The feasibility of the method for the thermoelastic characterization of coating-substrate systems is demonstrated on the basis of simulated data containing typical levels of noise. Besides the classical analysis of the photoacoustic part of the signals, which involves fitting surface acoustic wave dispersion curves, the photothermal part of the signals is analyzed by introducing thermal wave dispersion curves to represent and interpret their grating wavelength dependence. The intrinsic possibilities and limitations of both inverse problems are quantified by making use of least and most squares analysis.

Keywords: Coating-substrate samples; Differential heterodyne detection; Impulsive stimulated scattering; Optical scattering theory; Thermal wave dispersion; Thermoelastic material property characterization

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