Yu. P. Meshalkin, V. A. Svetlichnyi, A. V. Reznichenko, A. Yu. Myachin, S. S. Bakhareva, S. M. Dolotov, T. N. Kopylova, E. P. Ponomarenko, “Two-photon excitation of dyes in a polymer matrix by femtosecond pulses from a Ti:sapphire laser”, Kvantovaya Elektronika, 2003, Volume 33, Number 9,Pages <nobr>803

This article is cited in 9 papers

Active media. Lasers

Two-photon excitation of dyes in a polymer matrix by femtosecond pulses from a Ti:sapphire laser

Yu. P. Meshalkin^a, V. A. Svetlichnyi^b, A. V. Reznichenko^c, A. Yu. Myachin^a, S. S. Bakhareva^a, S. M. Dolotov^c, T. N. Kopylova^b, E. P. Ponomarenko^c

^a Center for Photodynamic Research, Research Institute of Physiology, Russian Academy of Medical Sciences, Siberian Branch, Novosibirsk
^b V.D. Kuznetsov Siberian Physicotechnical Institute at Tomsk State University
^c "Alfa-Akonis" Research and Devices Enterprise, Dolgoprudnyi, Moscow region

Abstract: Two-photon fluorescence was observed for 18 organic dyes in a polymethyl methacrylate (PMMA) matrix excited by a femtosecond Ti:sapphire laser. The product of the cross section for two-photon absorption by the quantum yield of fluorescence (two-photon fluorescence cross section) is estimated by comparing it with fluorescence of Rhodamine 6G in ethanol. Using this parameter, dyes are selected that exhibit the most intense fluorescence in PMMA and their concentrations in PMMA are optimised. Coumarin and rhodamine dyes in polymer matrices are proposed for using as visualisers of femtosecond radiation of a Ti:sapphire laser and as detectors in self-triggering systems.

PACS: 33.50.Dq, 33.80.Rv

Received: 31.10.2003