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Technical Physics
Published in: Technical Physics 9/2018

01-09-2018 | PHYSICAL APPROACHES AND PROBLEMS OF DATA INTERPRETATION IN THE LIFE SCIENCES

Polarized Fluorescence in Indole under Two-Photon Excitation by Femtosecond Laser Pulses

Authors: M. E. Sasin, V. I. Tushkanov, A. G. Smolin, P. S. Shternin, O. S. Vasyutinskii

Published in: Technical Physics | Issue 9/2018

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Abstract

We have analyzed the decay of fluorescence intensity in indole dissolved in propylene glycol under two-photon excitation by linearly and circularly polarized femtosecond laser pulses in the wavelength range 475–510 nm. The dependences of fluorescence intensity I0, anisotropy r, and parameter Ω on the excitation energy have been determined and analyzed. In particular, a nonmonotonic behavior of I0 indicating the increase of indole excited state density in the excitation energy range above 5.1 eV and the anisotropy sign reversal due to the variation of the symmetry of indole vibronic states have been observed and interpreted theoretically.
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Metadata
Title
Polarized Fluorescence in Indole under Two-Photon Excitation by Femtosecond Laser Pulses
Authors
M. E. Sasin
V. I. Tushkanov
A. G. Smolin
P. S. Shternin
O. S. Vasyutinskii
Publication date
01-09-2018
Publisher
Pleiades Publishing
Published in
Technical Physics / Issue 9/2018
Print ISSN: 1063-7842
Electronic ISSN: 1090-6525
DOI
https://doi.org/10.1134/S1063784218090189

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