Thermal diffusion properties of interfaces are measured using self-induced surface thermal lensing with a single laser beam. The time evolution of the reflected beam reveals information on heat diffusion away from the interface. Unambiguous correlation between measured signal and thermal diffusivity is shown, theoretically and experimentally, from which calibration curves are obtained. Being simpler and less sensitive to vibrations and misalignments, the technique offers definite advantages over standard two-beam (pump-probe) methods.
© 2008 Optical Society of America
Optics at Surfaces
Original Manuscript: August 25, 2008
Revised Manuscript: October 10, 2008
Manuscript Accepted: October 28, 2008
Published: December 3, 2008
Jean-Philippe Bourgoin, Serge Doiron, Michel Deveaux, and Alain Haché, "Single laser beam measurement of thermal diffusivity," Appl. Opt. 47, 6530-6534 (2008)