Time-Harmonic Photothermal Heating by Nanoparticles in a Non-Fourier Medium

We analyze the time-harmonic heating of a non-Fourier medium by spherical nanoparticles via the photothermal effect. The nanoparticle is embedded in a medium with thermal properties similar to those reported for organic tissue that does not obey Fourier's law of heat conduction but rather the Cattaneo-Vernotte equation. By assuming the nanoparticle is illuminated with an intensity-modulated laser, we show that the temperature profile outside the nanoparticle oscillates and, at specific separations, can have a temperature 16% lower than predicted using Fourier's law of heat conduction.