Nonlinear light absorption by liquid and solid solutions of organic dyes

Olga V. Przhonska; Mikhail V. Bondar; Eugene A. Tikhonov

doi:10.1117/12.173829

15 May 1994 Nonlinear light absorption by liquid and solid solutions of organic dyes

Olga V. Przhonska, Mikhail V. Bondar, Eugene A. Tikhonov

Proceedings Volume 2143, Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications; (1994) https://doi.org/10.1117/12.173829
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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 I_s (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 I_s 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.

Citation Download Citation

Olga V. Przhonska, Mikhail V. Bondar, and Eugene A. Tikhonov "Nonlinear light absorption by liquid and solid solutions of organic dyes", Proc. SPIE 2143, Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications, (15 May 1994); https://doi.org/10.1117/12.173829

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