Abstract
A dynamic theory of two-photon correlators for a single impurity center developed recently by the author [I. S. Osad’ko, Zh. Éksp. Teor. Fiz. 113, 1606 (1998) [JETP 86, 875 (1998)] has been generalized to the case in which the center interacts with nonequilibrium two-level systems (TLSs) in polymers and glasses. Quantum tunneling transitions in TLS manifest themselves as random jumps of a spectral line of an impurity center. These jumps can be either spontaneous or light-induced. Interaction between the impurity center and many nonequilibrium TLSs, which exist in polymers, results in a time dependence of the optical dephasing rate 1/T 2 of an impurity molecule, i.e., in spectral diffusion. This paper describes how the jumps of the spectral line manifest themselves in the two-photon correlator, which can be measured in experiments.
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Zh. Éksp. Teor. Fiz. 116, 962–985 (September 1999)
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Osad’ko, I.S. Emergence of spectral line jumps and spectral diffusion in the two-photon correlator of a single impurity center. J. Exp. Theor. Phys. 89, 513–524 (1999). https://doi.org/10.1134/1.559010
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DOI: https://doi.org/10.1134/1.559010