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Updated: Jul 16, 2026

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Probing quantum-mechanical level repulsion in disordered systems by means of time-resolved selectively excited
A V Malyshev1, V A Malyshev, J Knoester
1GISC, Departamento de Física de Materiales, Universidad Complutense, E-28040 Madrid, Spain.
Physical Review Letters
|March 16, 2007
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.

