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Photothermal deflection spectroscopy and detection

Applied Optics · 1981 · Vol. 20(8) · pp. 1333–1333

W. B. Jackson✉(Lawrence Berkeley National Laboratory)Nabil M. Amer(University of California, Berkeley)Albert‐Claude Boccara(ParisTech)D. Fournier(ParisTech)

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Abstract

The theory for a sensitive spectroscopy based on the photothermal deflection of a laser beam is developed. We consider cw and pulsed cases of both transverse and collinear photothermal deflection spectroscopy for solids, liquids, gases, and thin films. The predictions of the theory are experimentally verified, its implications for imaging and microscopy are given, and the sources of noise are analyzed. The sensitivity and versatility of photothermal deflection spectroscopy are compared with thermal lensing and photoacoustic spectroscopy.

Thermography and Photoacoustic Techniques Photoacoustic and Ultrasonic Imaging Laser Material Processing TechniquesPhotothermal therapyPhotothermal spectroscopyPhotoacoustic spectroscopyOpticsSpectroscopyDeflection (physics)Materials scienceLaser beamsLaserPhysics

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