The interaction between molecular electronic transitions and electromagnetic fields can be
enlarged to the point where distinct hybrid light–matter states, polaritons, emerge. The …

In the past decade, much theoretical research has focused on studying the strong coupling
between organic molecules (or quantum emitters, in general) and light modes. The …

Resonances are essential for understanding the interactions between light and matter in
photonic systems. The real frequency response of the non-Hermitian systems depends on …

The ability to confine THz photons inside deep-subwavelength cavities promises a
transformative impact for THz light engineering with metamaterials and for realizing …

The nanostructures of natural species offer beautiful visual appearances with saturated and
iridescent colors, and the question arises whether we can reproduce or even create unique …

The intriguing properties of polaritons resulting from strong and ultrastrong light–matter
coupling have been extensively investigated. However, most research has focused on …

All electromagnetic systems, in particular resonators or antennas, have resonances with
finite lifetimes. The associated eigenstates, also called quasinormal modes, are essentially …

The ability of nanophotonic cavities to confine and store light to nanoscale dimensions has
important implications for enhancing molecular, excitonic, phononic, and plasmonic optical …

Scattering theory is the basis of all linear optical and photonic devices, whose spectral
response underpins wide-ranging applications from sensing to energy conversion. Unlike …

Resonant structures in modern nanophotonics are non-Hermitian (leaky and lossy), and
support quasinormal modes. Moreover, contemporary cavities frequently include two …