研究目的
Investigating resonantly enhanced second-harmonic generation (SHG) by dielectric nanoparticles made of noncentrosymmetric materials with bulk quadratic nonlinearity, focusing on the multipolar nature of the second-harmonic generated fields in AlGaAs and BaTiO3 nanoparticles.
研究成果
The study provides a detailed analytical solution for the resonantly enhanced SHG driven by the MD mode and derives selection rules for the multipolar composition of the nonlinear radiation. The findings can be instructive for the design of highly-efficient nonlinear all-dielectric nanoantennas and subwavelength light sources with controllable radiation characteristics.
研究不足
The study focuses on spherical nanoparticles and specific materials (AlGaAs and BaTiO3), which may limit the generalizability of the findings to other shapes and materials.
