Controllable nonlinear effects in a hybrid optomechanical semiconductor microcavity containing a quantum dot and Kerr medium

TL;DR

This paper theoretically explores how Kerr nonlinearity influences a hybrid quantum optomechanical system with quantum dots, revealing controllable optical effects, entanglement potential, and applications in optical switching and quantum communication.

Contribution

It introduces a novel hybrid system with controllable nonlinear effects, demonstrating optical switching, entanglement, and spectrum features driven by Kerr nonlinearity.

Findings

System can act as an all-optical switch.

Normal mode splitting occurs at high Kerr nonlinearity.

System exhibits bipartite entanglement under proper tuning.

Abstract

We theoretically investigate the nonlinear effects in a hybrid quantum optomechanical system consisting of two optically coupled semiconductor microcavities containing a quantum dot and a Kerr nonlinear substrate.The steady state behavior of the mean intracavity optical field demonstrates that the system can be used as an all optical switch. We further investigate the spectrum of small fluctuations in the mechanical displacement of the movable distributed Bragg reflectors (DBR) and observe that normal mode splitting (NMS) takes place for high Kerr nonlinearity and pump power. In addition, we have shown that steady state of the system exhibits two possible bipartite entanglements by proper tuning of the system parameters. The entanglement results suggest that the proposed system has the potential to be used in quantum communication platform. Our work demonstrates that the Kerr-nonlinearity can effectively control the optical properties of the hybrid system, which can be used to design efficient optical devices.