Few-photon all-optical phase rotation in a quantum-well micropillar cavity

Abstract

Photonic platforms are an excellent setting for quantum technologies because weak photon-environment coupling ensures long coherence times. The second key ingredient for quantum photonics is interactions between photons, which can be provided by optical nonlinearities in the form of cross-phase-modulation (XPM). This approach underpins many proposed applications in quantum optics and information processing, but achieving its potential requires strong single-photon-level nonlinear phase shifts and also scalable nonlinear elements. In this work we show that the required nonlinearity can be provided by exciton-polaritons in micropillars with embedded quantum wells. These combine the strong interactions of excitons with the scalability of micrometer-sized emitters. We observe XPM up to $3\pm 1$ mrad per particle using laser beams attenuated to below single photon average intensity. With our work serving as a first stepping stone, we lay down a route for quantum information processing in polaritonic lattices.

References in corpus (12)

• Observation of Superfluidity of Polaritons in Semiconductor Microcavities
• Polariton laser using single micropillar GaAs-GaAlAs semiconductor cavities
• Topological Polaritons
• Polariton $\mathbb{Z}$ Topological Insulator
• Quantum Metrology: Dynamics vs. Entanglement
• Topological Polaritons and Excitons in Garden Variety Systems
• Nonlinear pi phase shift for single fiber-guided photons interacting with a single atom
• Observation of optical-fiber Kerr nonlinearity at the single-photon level
• Methods for Producing Optical Coherent State Superpositions
• Large Cross-Phase Modulations at the Few-Photon Level
• Photonic Versus Electronic Quantum Anomalous Hall Effect
• Magnetic field effect on polarization and dispersion of exciton-polaritons in planar microcavities

Cited by in corpus (10)

• Quantum machine learning with Adaptive Boson Sampling via post-selection
• Non-linear Boson Sampling
• Nonlinear Rydberg exciton-polaritons in Cu${}_2$O microcavities
• Probing many-body correlations using quantum-cascade correlation spectroscopy
• Spin resonance induced by a mechanical rotation of a polariton condensate
• Microscopic theory of nonlinear phase space filling in polaritonic lattices
• Superselection rules and bosonic quantum computational resources
• Electrically tunable and enhanced nonlinearity of moiré exciton-polaritons in transition metal dichalcogenide bilayers
• Adiabatic theory of one-dimensional curved polariton waveguides
• Polaritonic Machine Learning for Graph-based Data Analysis