Photopyroelectric (PPE) Phase Spectroscopy for Sensitive Optical Absorption Coefficient and Thermal Diffusivity Measurement

A. Frandas Institute for Isotopic and Molecular Technology, POB 700, 3400, Cluj—Napoca 5, Romania

M. Chirtoc Institute for Isotopic and Molecular Technology, POB 700, 3400, Cluj—Napoca 5, Romania

R. M. Candea Institute for Isotopic and Molecular Technology, POB 700, 3400, Cluj—Napoca 5, Romania

Abstract

A novel spectroscopic method for the measurement of small relative changes of the optical absorption coefficient or thermal diffusivity is demonstrated, based on a sharp signal phase variation in PPE experiments, under well defined circumstances.

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Photopyroelectric (PPE) Phase Spectroscopy for Sensitive Optical Absorption Coefficient and Thermal Diffusivity Measurement

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Photopyroelectric (PPE) Phase Spectroscopy for Sensitive Optical Absorption Coefficient and Thermal Diffusivity Measurement

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