Excitonic Coherent Emission in Semiconductors

Takashi Kuroda

Joaquín Fernández-Rossier, C. Tejedor, Roberto D. Merlin

Shimon Weiss, Mary‐Ann Mycek, J.‐Y. Bigot +2 more

We show that the many-body interactions among excitons govern the temporal line shape of the coherent (free induction decay) emission from semiconductor quantum walls. At low exciton densities, they become the dominant contribution to the emission.

Guangri Jin, Zhaoxin Liang, Wu-Ming Liu

We investigate novel oscillating emission modulated by collapses and revivals due to nonlinear exciton-exciton interaction in a semiconductor microcavity. The analytical expressions of the light intensity for both the excitonic number state and the coherent state are presented by using a rotating wave approximation. Our results show that the revival time of the coherent state case is twice that of the number state, which may be useful in practical experiments to measure the quantum state of the excitons.

G. P. Golubev, V. Dneprovskij, E. V. Zimenko +2 more

S. W. Koch, M. Kira, T. Meier

A microscopic many-body theory for the optical and electronic properties of semiconductors is reviewed with an emphasis on the role of correlation effects. At the semiclassical level, the semiconductor Bloch equations include many-body effects via bandgap and field renormalization as well as correlation contributions representing two electron-hole pair amplitudes, excitonic populations, and coupled interband and intraband coherences. These Coulomb interaction induced carrier correlations lead to characteristic signatures in nonlinear semiconductor spectroscopy. At the fully quantum mechanical level the dominant light-matter correlations are described by coupled semiconductor Bloch and luminescence equations. Excitonic emission properties of quantum well and microcavity systems are discussed, including effects such as coherent signatures in the secondary emission and coherent control of the emitted light.