Use of Differential Thermal Lensing to Study Two-Photon Absorption in Solutions

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The thermal lensing technique is applied to study two-photon absorption of dye molecules in organic solutions. With the use of a differential two-cell thermal lens spectrometer, the contribution due to one-photon absorption by solvent molecules is suppressed. Observed power dependence of the thermal lensing signal confirms the two-photon character of the absorption process.

Keywords: Thermal lens spectroscopy; Two-photon absorption

Document Type: Research Article


Affiliations: 1: Centro de Física, Instituto Venezolano de Investigaciones Científicas, Apartado 21827, Caracas 1020 A, Venezuela 2: Escuela de Química, Universidad Central de Venezuela, P.O. 47102, Caracas 1041 A, Venezuela

Publication date: November 1, 1994

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