Optical metasurfaces, ie arrays of nanoantennas with sub-wavelength size and separation,
enable the manipulation of light-matter interactions in miniaturized optical components with …

We predict theoretically a regime of photon-pair generation driven by the interplay of
multiple bound states in the continuum resonances in nonlinear metasurfaces. This …

Integrated thin-film lithium niobate platform has recently emerged as a promising candidate
for next-generation, high-efficiency wavelength conversion systems that allow dense …

Lithium Niobate (LN) is an important nonlinear optical material. Here we demonstrate LN
microdisk resonators that feature optical quality factor~ 10^ 5, realized using robust and …

The phase-matching condition is a key aspect in nonlinear wavelength conversion
processes, which requires the momenta of the photons involved in the processes to be …

Photonic nanostructures simultaneously maximizing spectral and spatial overlap between
fundamental and second-harmonic confined modes are highly desirable for enhancing …

Second-harmonic generation in nonlinear materials can be greatly enhanced by realizing
doubly resonant cavities with high quality factors. However, fulfilling such doubly resonant …

The enhanced second-harmonic generation (SHG) from a monolayer WS2 coupled to a
plasmonic nanocavity is experimentally and theoretically investigated. The nanocavity is …

In addition to their strong nonlinear optical response, transition metal dichalcogenides
(TMDCs) possess a high refractive index in the visible and infrared regime. Therefore, by …

The exploration of infrared (IR) nonlinear optical (NLO) materials remains attractive because
of the urgent requirements in the laser field. Meanwhile, the deepened cognition of structure …