Exciton squeezed state in optically excited semiconductors

M. Kira, S. W. Koch

Leonid V. Keldysh

Nguyen Ba An

We consider an optically excited semiconductor as a coherent system of interacting excitons and photons. Within the boson formalism and secular approximation the analytical expressions for the exciton quadrature variances are rigorously derived. The analysis of these variances over the relevant parameter space shows that initially coherent excitons can evolve into squeezed states in a finite-size semiconductor, which must possess both linear and non-linear interactions.

Nguyễn Hồng Quang

The time evolution from coherent states to squeezed states of high density excitons is studied theoretically based on the boson formalism and within the Random Phase Approximation. Both the mutual interaction between excitons and the anharmonic exciton-photon interaction due to phase-space filling of excitons are included in consideration. It is shown that the exciton squeezing depends strongly on the exciton density in semiconductors and becomes smaller with increasing the latter.

Михаил Михайлович Глазов, Robert A. Suris

Nguyen Ba An

In this paper a mechanism for the generation of a squeezed state of light is theoretically presented. Due to coupling with excitons and via exciton-exciton interaction, a light beam propagating within a finite-size semiconductor sample is shown to evolve into a squeezed state. Based on an effective bosonic Hamiltonian, which is obtained from the original fermionic one, a detailed derivation of the photon quadrature variances is presented and dependences of the photon squeezing on both the extrinsic and intrinsic parameters are analyzed.