21 October 1998 Fluorescence-detected coherent phenomena on single triplet-state molecules
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Proceedings Volume 3485, 11th International Vavilov Conference on Nonlinear Optics; (1998) https://doi.org/10.1117/12.328223
Event: Eleventh International Vavilov Conference on Nonlinear Optics, 1997, Novosibirsk, Russian Federation
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.
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Sergei Ya. Kilin, Sergei Ya. Kilin, Alexander P. Nizovtsev, Alexander P. Nizovtsev, Paul R. Berman, Paul R. Berman, Joerg Wrachtrup, Joerg Wrachtrup, Christian von Borczyskowski, Christian von Borczyskowski, } "Fluorescence-detected coherent phenomena on single triplet-state molecules", Proc. SPIE 3485, 11th International Vavilov Conference on Nonlinear Optics, (21 October 1998); doi: 10.1117/12.328223; https://doi.org/10.1117/12.328223
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