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25 April 2024

» pubmed » pmid17359127

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Probing quantum-mechanical level repulsion in disordered systems by means of time-resolved selectively excited resonance fluorescence
A V Malyshev ; V A Malyshev ; J Knoester ;
Date:	23 Feb 2007
Journal:	Phys Rev Lett, 98 (8), 087401
Abstract:	We argue that the time-resolved spectrum of selectively-excited resonance fluorescence at low temperature provides a tool for probing the quantum-mechanical level repulsion in the Lifshits tail of the electronic density of states in a wide variety of disordered materials. The technique, based on detecting the fast growth of a fluorescence peak that is redshifted relative to the excitation frequency, is demonstrated explicitly by simulations on linear Frenkel exciton chains.
Source:	PubMed, pmid17359127
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