Polaron-Polaritons in the Integer and Fractional Quantum Hall Regimes

Abstract

Elementary quasi-particles in a two dimensional electron system can be described as exciton-polarons since electron-exciton interactions ensures dressing of excitons by Fermi-sea electron-hole pair excitations. A relevant open question is the modification of this description when the electrons occupy flat-bands and electron-electron interactions become prominent. Here, we perform cavity spectroscopy of a two dimensional electron system in the strong-coupling regime where polariton resonances carry signatures of strongly correlated quantum Hall phases. By measuring the evolution of the polariton splitting under an external magnetic field, we demonstrate the modification of electron-exciton interactions that we associate with phase space filling at integer filling factors and polaron dressing at fractional filling factors. The observed non-linear behavior shows great promise for enhancing polariton-polariton interactions.

6 pages, 3 figures

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• Cavity Quantum Electrodynamics at Arbitrary Light-Matter Coupling Strengths
• Theory of exciton-electron scattering in atomically thin semiconductors
• The Free Electron Gas in Cavity Quantum Electrodynamics
• Unstable and stable regimes of polariton condensation
• Polaritonic Hofstadter Butterfly and Cavity-Control of the Quantized Hall Conductance
• Exciton-polarons in doped semiconductors in a strong magnetic field
• Antiferromagnet-semiconductor van der Waals heterostructures: interlayer interplay of exciton with magnetic ordering
• Nonlinear optics in the fractional quantum Hall regime
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• Accelerating Polaritons with External Electric and Magnetic Fields
• Polaron spectroscopy of a bilayer excitonic insulator
• Berry Phase and Topology in Ultrastrongly Coupled Quantum Light-Matter Systems
• Tunable optical nonlinearity for TMD polaritons dressed by a Fermi sea
• Anyonic molecules in atomic fractional quantum Hall liquids: a quantitative probe of fractional charge and anyonic statistics
• Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides
• Cavity Induced Collective Behavior in the Polaritonic Ground State
• Cavity Moiré Materials: Controlling Magnetic Frustration with Quantum Light-Matter Interaction
• Optical control over bulk excitations in fractional quantum Hall systems
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• Optical excitations in compressible and incompressible two-dimensional electron liquids
• Functional Renormalization Group Approach to Circuit Quantum Electrodynamics
• Valley-contrasting interband transitions and excitons in symmetrically biased dice model
• Two-dimensional exciton-polariton interactions beyond the Born approximation
• Excitons in periodic potentials
• Polaritons for testing the universality of an impurity in a Bose-Einstein condensate
• Cavity-mediated electron hopping in disordered quantum Hall systems
• Spin polarization of Quantum Hall states for filling factors 1 < v < 2 measured with microcavity polaritons
• Quantization of Polaritons Confined in Dielectric Structures
• Magnetic-field-induced cavity protection for intersubband polaritons