Prof. Nelson Astrath received the IPPA Junior Prize for outstanding experimental and theoretical contributions to the development of different photothermal methods, the mode mismatched thermal mirror technique in particular, which has substantially enhanced material research in general, and the study of photochemical and photophysics processes in liquids in particular. For his contribution to the experimental demonstration and detailed theoretical interpretation of radiation forces in water by making use of a photomechanical mirror detection approach.

Link.