Applied Physics Letters · 1986 · 42 citations · 6 references
EngineeringBiomedical EngineeringBiomedical ImagingDiagnostic ImagingOpticsImage SensorsImagingNonlinear Optical MicroscopyNonlinear OpticsOptical DiagnosticsOptical ImagingMicroscopyNonlinear Contrast MechanismsNonlinear Optical PropertiesPhotothermal EffectsTemperature Sensor LinearityThermal Imaging
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.
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Per-Erik Nordal, Svein Otto Kanstad · Physica Scripta · 1979 · 276 citations
Photoacoustics on a microscopic scale
H. K. Wickramasinghe, R.C. Bray, V. B. Jipson et al. · Applied Physics Letters · 1978 · 106 citations
S. Ameri, E.A. Ash, V. Neuman et al. · Electronics Letters · 1981 · 89 citations
Natural Sciences, Biomedical Engineering, Biomedical Optics +12