Second harmonic generation (SHG) as an essential nonlinear optical effect, has gradually
shifted its research trend toward the integration and miniaturization of photonic and …

Lithium niobate (LiNbO3) is a material that has drawn great interest in nonlinear optics
because of its large nonlinear susceptibility and wide transparency window. However, for …

The miniaturization of nonlinear light sources is central to the integrated photonic platform,
driving a quest for high-efficiency frequency generation and mixing at the nanoscale. In this …

We present a theoretical study of circular dichroism in the second-harmonic signal of single
dielectric nanostructures with different symmetries and noncentrosymmetric materials. We …

Second harmonic generation (SHG) in optical materials serves as important techniques for
laser source generations in awkward spectral ranges, physical identities of materials in …

Controlling harmonic generation is crucial for nonlinear optics and nanophotonic devices.
Herein, a 1D photonic crystal heterostructure is theoretically proposed comprising a metal …

This work investigates a metasurface design to achieve remarkable second harmonic
generation (SHG) conversion efficiency and enhance effective nonlinear susceptibility using …

Sum frequency generation (SFG) has multiple applications, from optical sources to imaging,
where efficient conversion requires either long interaction distances or large field …

We revisit a few aspects of the unusual features arising with metamaterials and
metasurfaces in the context of their electromagnetic properties. We consider the properties …

Light plays a central role in the way we experience the world around us and this perception
is solely based on linear optics. 1 For example, the rays with different colours forming a …