Publication
Applied Physics Letters
Paper

Nonlinear photothermal imaging

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Abstract

A new technique is described whereby one can extract the nonlinear photothermal properties of a sample in photothermal microscopy. The basic scheme relies on chopping a pump heating beam at ω and detecting the temperature variation of the sample using a linear temperature sensor (in our case a mirage detector) tuned to 2ω. Harmonic images of cracks and other samples show very high contrast when compared with the fundamental image.

Date

01 Jan 1986

Publication

Applied Physics Letters

Authors

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