Response-theory for nonresonant hole burning: Stochastic dynamics

Details Response-theory for nonresonant hole burning: Stochastic dynamics Response-theory for nonresonant hole burning: Stochastic dynamics

2000-02-28

arxiv.org/abs/cond-mat/0002435v2

Physics

Condensed Matter

revised version, 7 pages, 2 figures

Scientific paper

10.1209/epl/i2001-00195-4

Using non-linear response theory the time signals relevant for nonresonant spectral hole burning are calculated. The step-reponse function following the application of a high amplitude ac field (pump) and an intermediate waiting period is shown to be the sum of the equilibrium integrated response and a modification due to the preparation via ac irradiation. Both components are calculated for a class of stochastic dipole reorientation models. The results indicate that the method can be used for a clearcut distinction of homogeneously and heterogeneously broadened susceptibilities as they occur in the relaxation of supercooled liquids or other disordered materials. This is because only in the heterogeneous case is a frequency selective modification of the response possible.

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