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Proceedings Paper

Two-photon absorption properties of (N-carbazolyl)-stilbenes
Author(s): Jonathan Segal; Zvi Kotler; M. Sigalov; Amos Ben-Asuly; Vladimir Khodorkovsky
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Paper Abstract

We have studied the two-photon absorption (TPA) and fluorescence properties of a series of phenylpolyenes with N-carbazolyl as donor end-groups in symmetric positions. The symmetric substitution of carbazole end-groups enhances the photostability of the molecules and maintains high TP coefficients. High fluorescence quantum efficiencies have been measured. The results suggest that TP chromophores with carbazole donors are promising materials for applications in two-photon imagin and sensitization. The study covers a broad excitation spectrum from 580nm to 820nm using a picosecond optical parametric source. We take advantage of the correlation between idler and signal waves emerging from the parametric generator and calibrate our results against Rhodamine B for which reliable data is available in the long wave range.

Paper Details

Date Published: 11 October 1999
PDF: 7 pages
Proc. SPIE 3796, Organic Nonlinear Optical Materials, (11 October 1999); doi: 10.1117/12.368269
Show Author Affiliations
Jonathan Segal, Soreq Nuclear Research Ctr. (Israel)
Zvi Kotler, Soreq Nuclear Research Ctr. (Israel)
M. Sigalov, Ben-Gurion Univ. of the Negev (Israel)
Amos Ben-Asuly, Ben-Gurion Univ. of the Negev (Israel)
Vladimir Khodorkovsky, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 3796:
Organic Nonlinear Optical Materials
Manfred Eich; Manfred Eich; Mark G. Kuzyk, Editor(s)

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