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Laser Physics

Interaction between a semiconductor quantum dot microcavity and a squeezed vacuum in a cavity: effects on the photon statistics

S A Rastghalam, M. Bagheri Harouni

Published Oct 15, 2013• 4 citations
Publisher

Abstract

The interaction between a squeezed vacuum and a semiconductor quantum dot microcavity is studied. The influence of this interaction on the photon statistics, one measurable quantity, is investigated in the presence of the electron–phonon interaction. When the system interacts with the squeezed vacuum, the non-classical features of the emitted photons are studied. It turns out that the photon counting statistics depend on the detuning and temperature. The emitted photons also exhibit non-classical features such as anti-bunching, and their non-classical features depend on the degree of squeezing. Moreover, it is found that the stronger the squeezed vacuum, the weaker the non-classical features in the photon counting statistics.

DOI
10.1088/1054-660x/23/11/115202

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The quantum features of the temporal photon statistics of an exciton–cavity coupled system in a quantum-well semiconductor microcavity are investigated analytically. Under the secular approximation, if the nonlinear interactions, i.e. the exciton–exciton coupling and the phase-space filling, are much weaker than the exciton–photon interaction, the evolution of the Fano factor shows that the distribution of the photon numbers exhibits the feature of collapses–revivals (CRs), and the relevant revival time may be adjusted by several factors such as the total particle number, the detuning, and the nonlinear coupling strengths, etc. Especially, the ideal maximum antibunching with the minimum value 0 of the Fano factor occurs periodically for such a situation, with the dissipation of exciton–polariton being ignored.
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We investigate a quantum-dot-based cavity system via the master-equation approach. The dynamics of the system is greatly affected by dissipation and dephasing processes. We include these phenomena to the theory through the master equation. The dissipation effects such as cavity loss, spontaneous recombination of excitons, and incoherent pumping are considered. The dephasing process is included as an electron--acoustic-phonon interaction. An intrinsic feature of solid-state cavity systems is the presence of electron-phonon interaction, which distinguishes this system from atomic cavity quantum electrodynamics. Due to the temperature dependence of phonons we use the complete form of the master equation (temperature dependence of dissipation rates) in this paper. We study the emission spectrum and photon statistics of the system. We show that cavity mode emission depends on temperature, and temperature strongly affects the photon statistics.