TITLE

Nonlinear photothermal imaging

AUTHOR(S)
Rajakarunanayake, Y. N.; Wickramasinghe, H. K.
PUB. DATE
January 1986
SOURCE
Applied Physics Letters;1/20/1986, Vol. 48 Issue 3, p218
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
9818953

 

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