When does nonlinear circular dichroism appear in achiral dielectric nanoparticles?

Abstract

Sometimes it appears, sometimes it does not. We present a theoretical study of circular dichroism in the second-harmonic signal of single dielectric nanostructures with different symmetries and noncentrosymmetric materials. We show that this effect is not fully identified only by macroscopic and lattice symmetries, but their relative orientation as well. Based on the cumbersome symmetry and modal analysis, we provide a general and very simple formula to determine whether the dichroism exists, and a table with the most significant cases.

References in corpus (5)

• Metasurfaces with maximum chirality empowered by bound states in the continuum
• Resonant state expansion applied to three-dimensional open optical systems
• Angular momentum-induced circular dichroism in non-chiral nanostructures
• Multipolar second-harmonic generation by Mie-resonant dielectric nanoparticles
• Second-harmonic optical circular dichroism of plasmonic chiral helicoid-III nanoparticles

Cited by in corpus (6)

• Nonlinear chiral metaphotonics
• Fast simulation of light scattering and harmonic generation in axially symmetric structures in COMSOL
• Nonlinearity-induced optical torque
• Scattering matrix for chiral harmonic generation and frequency mixing in nonlinear metasurfaces
• Achiral nanostructures: perturbative harmonic generation and dichroism under vortex and vector beams illumination
• Tensor-driven geometric phase in nonlinear AlGaAs metasurfaces