Understanding dephasing in mixed molecular crystals. II. Semiclassical dephasing and superradiance for hundreds of coupled absorbers

Journal Article (Journal Article)

We numerically investigate optical dephasing from as many as 500 interacting two-level absorbers by making the semiclassical approximation on the radiation-matter interaction which includes retarded dipole-dipole coupling and superradiant coupling. We calculate the superradiant decay rate following single pulse optical excitation, the photon echo decay and the fluorescence. By carrying out an expansion to the second order in time we demonstrate a fundamental difference between the homogeneous free-induction decay and photon echo decay which is due to radiation damping. We show that an echo sequence is capable of reversing superradiant damping in some cases. Specific computations for pentacene doped mixed molecular crystals, where "domains" of resonant impurities are likely to exist, are presented and compared with experimental results. © 1989 American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Spano, FC; Warren, WS

Published Date

  • January 1, 1989

Published In

Volume / Issue

  • 90 / 11

Start / End Page

  • 6034 - 6046

International Standard Serial Number (ISSN)

  • 0021-9606

Digital Object Identifier (DOI)

  • 10.1063/1.456369

Citation Source

  • Scopus