Barium titanate (BaTiO3) is a synthetic crystal used in electromechanical transducers and
multilayer ceramic capacitors. Since it is not available in nature, a variety of growth methods …

High-index dielectric nanostructures can support optical resonances of electric and
magnetic character with ultralow linear absorption. In contrast to plasmonics, they can be …

Metasurfaces, composed of artificial meta-atoms of subwavelength size, can support strong
light–matter interaction based on multipolar resonances and plasmonics, hence offering the …

Nonlinear optics is a well-established field of research that traditionally relies on the
interaction of light with macroscopic nonlinear media over distances significantly greater …

In display technologies or data processing, planar and subwavelength free-space
components suited for flat photonic devices are needed. Metasurfaces, which shape the …

Nonlinear photon conversion is a fundamental physical process that lies on the basis of
many modern disciplines, from bioimaging and theranostics in nanomedicine to material …

Miniaturized entangled photon sources, in particular based on subwavelength
metasurfaces, are highly demanded for the development of integrated quantum photonics …

Here we employ the quasibound state in the continuum (quasi-BIC) resonance in all-
dielectric metasurfaces for efficient nonlinear processes in consideration of the backward …

Optical materials are undergoing revolutionary transformations driven by nanotechnology.
Our ability to engineer structures at a scale smaller than the wavelength of light enables new …

The quest of a nonlinear optical material that can be easily nanostructured over a large
surface area is still ongoing. Here, we demonstrate a nanoimprinted nonlinear barium …