Adhikari, Subhasis; Spaeth, Patrick; Kar, Ashish; Baaske, Martin Dieter; Khatua, Saumyakanti; Orrit, Michel
(American Chemical Society, 2020-12)
The photothermal (PT) signal arises from slight changes of the index of refraction in a sample due to absorption of a heating light beam. Refractive index changes are measured with a second probing beam, usually of a ...