Two-photon absorption and laser photochemical decomposition of trans-stilbene substitutes

Valeriy A. Svetlichnyi; Yuriy P. Meshalkin

doi:10.1117/12.752364

9 July 2007 Two-photon absorption and laser photochemical decomposition of trans-stilbene substitutes

Valeriy A. Svetlichnyi, Yuriy P. Meshalkin

Proceedings Volume 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics; 67271E (2007) https://doi.org/10.1117/12.752364
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus

Abstract

The two-photon absorption (TPA) cross section of an ethanol solution of of three molecules (a trans-stilbene and its derivatives) exposed to radiation of the second harmonic of a Nd:YAG laser (532 nm) of nanosecond duration has been determined using the method based on the measurement of the photochemical decomposition of examined molecules, characterized by a low photostability. The quantum yield of the photoreaction (γ²⁶⁶) of dyes under one-photon excitation (4^-th harmonic Nd-YAG laser 266 nm) was preliminary determined by absorption method. Then photochemical decomposition of molecules was investigated at two-photon excitation TPA cross-section was determined. At definition of TPA cross-section of molecules, influence transient S₁-Sn absorption was taken into account. Comparison of values of TPA cross-section determined in the work, with the experimental and theoretical data received by other authors for these molecules were carried out.

Citation Download Citation

Valeriy A. Svetlichnyi and Yuriy P. Meshalkin "Two-photon absorption and laser photochemical decomposition of trans-stilbene substitutes", Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67271E (9 July 2007); https://doi.org/10.1117/12.752364

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