Excitonic superradiance to exciton-polariton crossover and the pole approximations

Gunnar Björk, Stanley K H Pau, Joseph M. Jacobson, Hui Cao, Yoshihisa Yamamoto

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

We examine the relationship between atomic and excitonic superradiance in thin and thick slab geometries. We demonstrate that superradiance can be treated by a unified formalism for atoms, Frenkel excitons, and Wannier excitons. It is well known that in sufficiently thick slabs, the normal modes of the system are polaritons, a superposition of the slab exciton, and photon modes. We specifically examine the crossover from superradiance to polariton modes and derive both the crossover slab length and the maximum superradiative decay rate. We show that the exciton and polariton pole approximations, which give simple expressions for superradiance and polariton mode decay rates, give excellent agreement with the exact expressions for the pertinent thicknesses for which the approximations are valid.

Original languageEnglish (US)
Pages (from-to)17310-17320
Number of pages11
JournalPhysical Review B
Volume52
Issue number24
DOIs
StatePublished - 1995
Externally publishedYes

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Superradiance
Excitons
polaritons
Poles
crossovers
slabs
poles
Laser modes
excitons
approximation
decay rates
Photons
formalism
Atoms
Geometry
LDS 751
photons
geometry
atoms

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Excitonic superradiance to exciton-polariton crossover and the pole approximations. / Björk, Gunnar; Pau, Stanley K H; Jacobson, Joseph M.; Cao, Hui; Yamamoto, Yoshihisa.

In: Physical Review B, Vol. 52, No. 24, 1995, p. 17310-17320.

Research output: Contribution to journalArticle

Björk, Gunnar ; Pau, Stanley K H ; Jacobson, Joseph M. ; Cao, Hui ; Yamamoto, Yoshihisa. / Excitonic superradiance to exciton-polariton crossover and the pole approximations. In: Physical Review B. 1995 ; Vol. 52, No. 24. pp. 17310-17320.
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