Theory of dressed-excitons

G. Compagno, Roberto Passante, Franco Persico

Christian Tanguy, Monique Combescot

Unlike the energy shift which has, at large detuning, the same dressed-atom value for all excitonic states and all space dimensions, we show that the relative change of the dressed-exciton absorption strength is the dressed-atom one multiplied by 1-d for every exciton level, d being the space dimension. The analytical derivation of this striking result uses an extension of Dalgarno's method to an arbitrary exciton level.

Stanley Pau, Gunnar G. Bjork, Joseph M. Jacobson +2 more

The threshold behavior of the stimulated parametric emission of dressed excitons in a microcavity is studied. The inelastic-phonon-scattering rates of the dressed exciton are calculated and are shown to be smaller than the bare quantum-well exciton values. The results describe the recently observed thresholdless photoemission behavior and predict a large stability for the dressed exciton modes inside a quantum-well microcavity.

Christo I. Ivanov, H. Barentzen, Marvin D. Girardeau

Tokio Ohta

Liu Shi-an, Lin Shi-ming, Qiming Wang

In this paper, we introduced the dressed exciton model of the semiconductor micro-cavity device. In the semiconductor micro cavity of vertical-cavity surface-emission device, the excitons first coupled with the cavity through an intra-electromagnetic field and formed the dressed excitons. Then these dressed excitons decayed into the vacuum cavity optical mode, as a multiparticle process. Through the quantum electrodynamics method, the dipole emission density and system energy decayed equation were obtained. And it was predicted that the excitons decay into a very narrow mode when the exciton-cavity coupling becomes strong enough.