Propagation analysis of heat wave in three-dimensional space for photoacoustic image analysis

Abstract

Photoacoustic microscope makes it possible to observe microstructures and defects of the sample by utilizing the diffraction and reflection phenomena of thermal waves and elastic waves, which have different wave properties. However, the heat conduction equation based on classical Fourier’s law could not reproduce the propagation behavior of the heat wave. Therefore, our group has attempted numerical simulations of thermal and elastic waves using non-Fourier heat conduction equations with time-delay terms and the finite difference time domain method. In this presentation, we report the results of numerical simulation of thermal and elastic waves propagating in three-dimensional space which is including defects.