Open AccessUsing optoacoustic imaging for measuring the temperature dependence of Grüneisen parameter in optically absorbing solutions
Author(s) -
Е. В. Петрова,
Sergey A. Ermilov,
Richard Su,
Vyacheslav Nadvoretskiy,
André Conjusteau,
Alexander A. Oraevsky
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.025077
Subject(s) - materials science , thermoelastic damping , absorbance , aqueous solution , optics , atmospheric temperature range , thermodynamics , thermal , chemistry , physics
Grüneisen parameter is a key temperature-dependent physical characteristic responsible for thermoelastic efficiency of materials. We propose a new methodology for accurate measurements of temperature dependence of Grüneisen parameter in optically absorbing solutions. We use two-dimensional optoacoustic (OA) imaging to improve accuracy of measurements. Our approach eliminates contribution of local optical fluence and absorbance. To validate the proposed methodology, we studied temperature dependence of aqueous cupric sulfate solutions in the range from 22 to 4 °C. Our results for the most diluted salt perfectly matched known temperature dependence for the Grüneisen parameter of water. We also found that Grüneisen-temperature relationship for cupric sulfate exhibits linear trend with respect to the concentration. In addition to accurate measurements of Grüneisen changes with temperature, the developed technique provides a basis for future high precision OA temperature monitoring in live tissues.