Photothermal techniques use optically induced heat fluxes to probe the optical and
thermal properties of materials. The techniques can be used for spectroscopy,
measurement of thermal parameters, non-destructive evaluation, energy transfer
studies and spectroscopic depth profiling.
A large literature on the various photothermal techniques and their applications
now exists, and several books are available giving a good overview of various
aspects of the subject (cf Bibliography).
Richard Michael Miller,
"Industrial applications of the photothermal effect", Proc. SPIE 1320, Infrared Technology and Applications, (1 October 1990); doi: 10.1117/12.22313; https://doi.org/10.1117/12.22313