This article is cited in 3 papers

Lasers

Quantum dot polarisation converter in an optomechanical cavity

A. V. Tsukanov, I. Yu. Kateev

Insitute of Physics and Technology, Institution of Russian Academy of Sciences, Moscow

Abstract: We propose a scheme of a quantum photon polarisation converter, which is based on controlled electron – photon – phonon transitions in a hybrid semiconductor nanostructure. This structure consists of a GaAs/InAs quantum dot (QD) that has a parallelepiped shape and contains a single electron, and an optomechanical microcavity (MC) based on a photonic crystal (PC) that supports two orthogonally polarised photonic modes and one mechanical (phonon) mode. Within the framework of the microscopic theory, the QD and MC performance characteristics are found. Populations of states of the system as functions of time and its parameters are calculated. The principal possibility of photon polarisation conversion using transitions in a five-level resonance scheme for coherent (single-photon) and steady-state (subphoton) regimes is shown. The MC optical and mechanical spectra are simulated, and the PC structure parameters are selected to ensure the efficient operation of the converter.

Keywords: quantum dot, microcavity, polarisation, photonic crystal, optical phonons, optomechanics.

Received: 07.11.2019

 English version: Quantum Electronics, 2020, 50:3, 291–298

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