Strong coupling of ionising transitions

Abstract

We demonstrate that a ionising transition can be strongly coupled to a photonic resonance. The strong coupling manifests itself with the appearance of a narrow optically active resonance below the ionisation threshold. Such a resonance is due to electrons transitioning into a novel bound state created by the collective coupling of the electron gas with the vacuum field of the photonic resonator. Applying our theory to the case of bound-to-continuum transitions in microcavity-embedded doped quantum wells, we show how those strong-coupling features can be exploited as a novel knob to tune both optical and electronic properties of semiconductor heterostructures.

10 pages, 7 figures

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• Nonperturbative cavity quantum electrodynamics: is the Jaynes-Cummings model still relevant?
• Perspective on real-space nanophotonic field manipulation using non-perturbative light-matter coupling
• Dark vertical conductance of cavity-embedded semiconductor heterostructures
• Cavity engineering of Hubbard $U$ via phonon polaritons
• An engineered planar plasmonic reflector for polaritonic mode confinement
• Exact solution of polaritonic systems with arbitrary light and matter frequency-dependent losses
• Terahertz chiral sub-wavelength cavities breaking time-reversal symmetry via ultra-strong light-matter interaction
• Bound polariton states in the Dicke-Ising model
• Theoretical proposals to measure resonator-induced modifications of the electronic ground-state in doped quantum wells
• Microscopic theory of excitons bound by light
• Cavity-Driven Attractive Interactions in Quantum Materials