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Proceedings Paper

Fluorescence-detected coherent phenomena on single triplet-state molecules
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Paper Abstract

Fluorescence detected magnetic resonance (FDMR) coherent phenomena on single triplet-state chromophore guest molecule in low-temperature organic host matrix are analyzed within the stochastic approach to describe triplet electron spin dephasing due to frequency fluctuations Ut induced by host-matrix proton spins dynamics. Exact equations for density matrix of a molecule averaged over histories of the fluctuations Ut are constructed using the model of N random telegraph process. The equations are applied to calculate FDMR responses of a molecule to cw/pulsed MW field and to describe a wide range of available experimental data on (1) the power-broadened FDMR line shapes, (2) the FDMR nutations, (3) the FDMR Hahn echo for pentacene+p- terphenyl pair supposing the fluctuations Ut to be slow. The failure of the standard Bloch equations for this system is demonstrated and the effects of microwaves-suppressed dephasing are discussed.

Paper Details

Date Published: 21 October 1998
PDF: 12 pages
Proc. SPIE 3485, 11th International Vavilov Conference on Nonlinear Optics, (21 October 1998); doi: 10.1117/12.328223
Show Author Affiliations
Sergei Ya. Kilin, Institute of Physics (Belarus)
Alexander P. Nizovtsev, Institute of Physics (Belarus)
Paul R. Berman, Univ. of Michigan (United States)
Joerg Wrachtrup, Technical Univ. of Chemnitz (Germany)
Christian von Borczyskowski, Technical Univ. of Chemnitz (Germany)

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

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