Recent experiments have demonstrated that light and matter can mix together to an extreme
degree, and previously uncharted regimes of light-matter interactions are currently being …

Toroidal excitation manifests as currents flowing on the surface of a torus along its meridians
that are known as poloidal currents. Several intriguing phenomena such as nonradiating …

Following the initial success of cavity quantum electrodynamics in atomic systems, strong
coupling between light and matter excitations is now achieved in several solid-state set-ups …

We investigate electron paring in a two-dimensional electron system mediated by vacuum
fluctuations inside a nanoplasmonic terahertz cavity. We show that the structured cavity …

Electrical dipole resonances typically have low Q factor and broad resonant linewidth
caused by strong free-space coupling with high radiative loss. Here, we present a strategy …

We revisit the derivation of Rabi-and Dicke-type models, which are commonly used for the
study of quantum light-matter interactions in cavity and circuit QED. We demonstrate that the …

Quantum mechanics ascribes to the ground state of the electromagnetic radiation zero-point
electric field fluctuations that permeate empty space at all frequencies. No energy can be …

Confinement of electromagnetic radiation in a subwavelength cavity is an important platform
for strong light–matter interaction as it enables efficient design of photonic switches …

Subwavelength electromagnetic field localization has been central to photonic research in
the last decade, allowing us to enhance sensing capabilities as well as increase the …

Free-space coupling to subwavelength individual optical elements is a central theme in
quantum optics, as it allows the control over individual quantum systems. Here we show that …