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Updated: Dec 9, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Polariton-driven phonon laser.

D L Chafatinos¹, A S Kuznetsov², S Anguiano¹

¹Department of Physics, Centro Atómico Bariloche & Instituto Balseiro (CNEA) and CONICET, Universidad Nacional de Cuyo (UNCuyo), Av. E. Bustillo 9500, R8402AGP S.C. de, Bariloche, Río Negro, Argentina.

Nature Communications

|September 12, 2020

Summary

This summary is machine-generated.

Researchers achieved laser-like phonon emission using hybrid quantum systems. This breakthrough in optomechanics demonstrates coherent phonon generation, paving the way for novel quantum technologies and phonon lasers.

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Area of Science:

Quantum physics
Optomechanics
Condensed matter physics

Background:

Efficient phonon generation is crucial for developing phonon lasers.
Hybrid quantum systems offer a novel platform for high-frequency (30-300 GHz) operation.
Cavity quantum electrodynamics and optomechanics are key areas of study.

Purpose of the Study:

To demonstrate laser-like phonon emission in a hybrid quantum system.
To explore coherent optomechanical phenomena with exciton polaritons.
To pave the way for new quantum technologies, including phonon lasers.

Main Methods:

Optomechanically coupling polariton Bose-Einstein condensates (BECs) with phonons in a semiconductor microcavity.
Utilizing GaAs/AlAs quantum wells coupled to cavity-confined optical and vibrational modes.
Non-resonant continuous wave laser excitation of a polariton BEC in a trap array.

Main Results:

Coherent mechanical self-oscillation and spectral sideband formation were induced.
Phonon occupation was enhanced five orders of magnitude above thermal values.
Demonstrated coherent cavity optomechanical phenomena with exciton polaritons.

Conclusions:

The study presents the first demonstration of coherent cavity optomechanical phenomena with exciton polaritons.
The findings pave the way for hybrid quantum technologies, phonon lasers, and phonon-photon translators.
Efficient phonon generation was achieved, advancing the development of phonon lasers.