Nonlinear chiral metaphotonics

TL;DR

This paper reviews recent advances in nonlinear chiral metaphotonics, focusing on optical resonances in nanostructures to enhance chiroptical effects and nonlinear harmonic generation.

Contribution

It provides a comprehensive overview of strategies using various optical resonances in nanostructures to achieve strong nonlinear chiroptical responses.

Findings

Enhanced circular dichroism in nanostructures

High efficiency nonlinear harmonic generation achieved

Utilization of multiple optical resonances for improved effects

Abstract

We review the physics and some applications of photonic structures designed for the realisation of strong $\textit{nonlinear chiroptical response}$. We pay much attention to the recent strategy of utilizing different types of $\textit{optical resonances}$ in metallic and dielectric subwavelength structures and metasurfaces, including surface plasmon resonances, Mie resonances, lattice guided modes, and bound states in the continuum. We summarize earlier results and discuss more recent developments for achieving large circular dichroism combined with the high efficiency of nonlinear harmonic generation.