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  1. No Access

    Chapter and Conference Paper

    Analysis of Photothermal Sensitivity in the Detection of Phase Transitions

    The photothermal signal sensitivity in detection of phase transitions is defined. The theoretical and experimental dependence of this sensitivity on frequency are investigated for two experimental configuratio...

    A. Hadj-Sahraoui, G. Louis, P. Peretti… in Photoacoustic and Photothermal Phenomena I… (1992)

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    Chapter and Conference Paper

    Anisotropic Thermal Diffusivity Measurements in a Discotic Liquid Crystal Using Photothermal Probe Beam Deflection

    It is well known that the optical beam deflection technique (OBD) can be applied to measurements of thermal diffusivities of materials. Assuming that thermal transport properties in columnar discotic liquid cr...

    M. Gharbia, A. Hadj-Sahraoui, G. Louis… in Photoacoustic and Photothermal Phenomena II (1990)

  3. No Access

    Chapter and Conference Paper

    Optical Properties of Cholesteric Liquid Crystals by Photoacoustics

    In a recent paper /1/, we have used the photoacoustic technique to study the second order smectic A-nematic phase transition in cyanobiphenyl liquid crystals. The aim of the present work is to detect selective...

    A. Hadj-Sahraoui, G. Louis, P. Peretti… in Photoacoustic and Photothermal Phenomena (1988)