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Proceedings Paper

Investigation of relaxation times of polymethine dyes absorbing in 750-850 nm spectral range
Author(s): N. Derevyanko; Rimantas Grigonis; Alexander Ishchenko; Valdas Sirutkaitis
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Paper Abstract

The relaxation times ((tau) ) of the first excited state of cationic symmetric polymethine dyes absorbing in the spectral range of 750 - 850 nm have been determined by a direct pump and probe method. The influence of the dye structure and solvent nature on the value of (tau) is discussed. The role of different intra- and intermolecular interactions in deactivation of the excited state of the dyes is considered. The perspective polymethine dyes ((tau) equals 11 - 75 ps) for passive mode locking of lasers on LiGaAlF6:Cr3+, KZnF3:Cr3+, and LiSrAlF6:Cr3+ crystals are proposed from the analysis of relaxation times.

Paper Details

Date Published: 29 May 2002
PDF: 6 pages
Proc. SPIE 4752, ICONO 2001: Ultrafast Phenomena and Strong Laser Fields, (29 May 2002); doi: 10.1117/12.469097
Show Author Affiliations
N. Derevyanko, Institute of Organic Chemistry (Ukraine)
Rimantas Grigonis, Vilnius Univ. (Lithuania)
Alexander Ishchenko, Institute of Organic Chemistry (Ukraine)
Valdas Sirutkaitis, Vilnius Univ. (Lithuania)

Published in SPIE Proceedings Vol. 4752:
ICONO 2001: Ultrafast Phenomena and Strong Laser Fields

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