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Proceedings Paper

Dispersion of the real and imaginary parts of cubic susceptibility in submicron films of pseudoisocyanine J aggregates
Author(s): Alexander I. Plekhanov; Sergei G. Rautian; Vladimir P. Safonov; Pavel A. Chubakov; Natalja A. Orlova; Vladimir V. Shelkovnikov
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Paper Abstract

The dispersion of cubic optical susceptibility of submicron films of pseudoisocianine J aggregates are measured by a z- scan technique. The values of Im(chi) (3), Re(chi) (3) near to J-peak were approximately 10-5 esu. The measurements have shown that the films near to J-peak have negative sign of Im(chi) (3)((omega) ), which corresponds to nonlinear bleaching of absorption. The maximum Im(chi) (3)((omega) ) is observed for (omega) approximately equals (omega) J. It is found that at low frequency side of J-peak the sign of Im(chi) (3)((omega) ) changes on positive. The measured dependence Re(chi) (3)((omega) ) has compared with the value calculated by Kramers-Kronig transformation. For optical dense samples the contribution of a thermal nonlinearity is displayed. The spectral behavior features of Re(chi) (3)((omega) ) and Im(chi) (3)((omega) ) are explained by four-level model of Frenkel exciton.

Paper Details

Date Published: 21 October 1998
PDF: 7 pages
Proc. SPIE 3485, 11th International Vavilov Conference on Nonlinear Optics, (21 October 1998); doi: 10.1117/12.328262
Show Author Affiliations
Alexander I. Plekhanov, Institute of Automation and Electrometry (Russia)
Sergei G. Rautian, Institute of Automation and Electrometry (Russia)
Vladimir P. Safonov, Institute of Automation and Electrometry (Russia)
Pavel A. Chubakov, Institute of Automation and Electrometry (Russia)
Natalja A. Orlova, Novosibirsk Institute of Organic Chemistry (Russia)
Vladimir V. Shelkovnikov, Novosibirsk Institute of Organic Chemistry (Russia)


Published in SPIE Proceedings Vol. 3485:
11th International Vavilov Conference on Nonlinear Optics
Sergei G. Rautian, Editor(s)

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