In this Review, the theory and applications of optical micro‐and nano‐resonators are
presented from the underlying concept of their natural resonances, the so‐called quasi …

The scattering of electromagnetic waves lies at the heart of most experimental techniques
over nearly the entire electromagnetic spectrum, ranging from radio waves to optics and x …

The study of resonant dielectric nanostructures with a high refractive index is a new research
direction in the nanoscale optics and metamaterial-inspired nanophotonics. Because of the …

Metasurfaces based on resonant subwavelength photonic structures enable novel methods
of wavefront control and light focusing, underpinning a new generation of flat-optics devices …

The specificity of modal-expansion formalisms is their capabilities to model the physical
properties in the natural resonance-state basis of the system in question, leading to a …

We introduce a second quantization scheme based on quasinormal modes, which are the
dissipative modes of leaky optical cavities and plasmonic resonators with complex …

We consider refractive index sensing with optical bounds states in the continuum (BICs) in
dielectric gratings. Applying a perturbative approach we derived the differential sensitivity …

We present a biorthogonal approach for modeling the response of localized electromagnetic
resonators using quasinormal modes, which represent the natural, dissipative eigenmodes …

Being motivated by the recent prediction of high-Q modes in subwavelength dielectric
resonators inspired by bound states in the continuum (BIC), we study the second-harmonic …

The scattering of electromagnetic waves by resonant systems is determined by the excitation
of the quasinormal modes (QNMs), ie the eigenmodes, of the system. This Review …