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Proceedings Paper

Nonlinear light absorption by liquid and solid solutions of organic dyes
Author(s): Olga V. Przhonska; Mikhail V. Bondar; Eugene A. Tikhonov
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Paper Abstract

The spectral dependences of the nonlinear light absorption by organic dyes have been measured for the first time. To analyze the results quantitatively, we propose to redetermine the nonlinearity parameter Is (the critical bleaching intensity) from a three-energy-level model of the dye. The resulting nonlinear absorption spectra indicate a monotonic and significant decrease in the region of the 0 - 0 transition compared with the short-wavelength part of the spectrum. A more than tenfold decrease in Is is recorded in the anti-Stokes region in a polymeric matrix, which is associated with inhomogeneous distribution of the absorption centers in the microheterogeneous medium, and with a decrease in the rate constant for rearranging centers in the ground state.

Paper Details

Date Published: 15 May 1994
PDF: 9 pages
Proc. SPIE 2143, Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications, (15 May 1994); doi: 10.1117/12.173829
Show Author Affiliations
Olga V. Przhonska, Institute of Physics (Ukraine)
Mikhail V. Bondar, Institute of Physics (Ukraine)
Eugene A. Tikhonov, Institute of Physics (Ukraine)

Published in SPIE Proceedings Vol. 2143:
Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications
Seth R. Marder; Joseph W. Perry, Editor(s)

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