Near-unity third-harmonic circular dichroism driven by quasi-BIC in asymmetric silicon metasurfaces

Marco Gandolfi, Andrea Tognazzi, Davide Rocco +2

We use numerical simulations to demonstrate third-harmonic generation with near-unity nonlinear circular dichroism (CD) and high conversion efficiency ($10^{-2}{\text{W}}^{-2}$) i…