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Optical Saturation in the Photothermal Spectroscopy of Fluorescent Materials
[chapter]
1990
Photoacoustic and Photothermal Phenomena II
Preserved Fulltext
The dependence of the fundamental and harmonic photothermal (PT) signal on the intensity I o of the illumination source is analyzed. It is shown that both components of the PT signal do not increase indefinitely with Io, but at sufficiently high power densities begin to decrease as 1/Io. Along with photoacoustic saturation, this defines an upper limit for the sensitivity of spectrometers based on PT detection.
doi:10.1007/978-3-540-46972-8_103
fatcat:ysi7urtqgrgsfmxveewzpukt7q