Skip to main content
Article thumbnail
Location of Repository

Polariton-polariton interactions and stimulated emission in semiconductor microcavities

By M.S. Skolnick, R.M. Stevenson, A.I. Tartakovskii, R. Butte, M. Emam-Ismail, D.M. Whittaker, P.G. Savvidis, J.J. Baumberg, A. Lemaitre, V.N. Astratov and J.S. Roberts

Abstract

Recent work on polariton-polariton scattering in semiconductor microcavities under continuous wave excitation conditions is reviewed. For weak non-resonant laser excitation, a marked bottleneck in the polariton distribution is observed, but which is suppressed by polariton-polariton scattering as the laser intensity is increased. However, the high excitation conditions necessary to observe stimulated emission lead to loss of strong coupling and conventional lasing in the weak coupling regime, By contrast for resonant excitation, polaritons are created directly in the polariton trap formed by the microcavity dispersion curve. Stimulated scattering of the bosonic quasi-particles occurs to the emitting state at the centre of the Brillouin zone, and to a companion state at high wavevector. The stimulation phenomena lead to condensation of the bosonic quasi-particles to two specific regions of k-space, and to the formation of a new state with macroscopic coherence. The prospects to achieve a polariton laser under conditions of non-resonant excitation are discussed

Topics: QC
Year: 2002
OAI identifier: oai:eprints.soton.ac.uk:14643
Provided by: e-Prints Soton

Suggested articles

Citations

  1. (2000). 16886. ¨´ wx 13 This result was also confirmed in
  2. (1992). 3314. wx 3
  3. (1998). 645; b doi
  4. (2000). R7854; . b Highly non-linear behaviour in single-beam resonant excitation experiments has also been observed in
  5. (2001). wx 17 This process is described theoretically in . a
  6. (1988). wx 20 The terminology of signal and idler beams comes from the literature on OPOs, see

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.