Monocrystalline Gold Metasurface to Control Anisotropic Second‐Harmonic Generation (Advanced Optical Materials 13/2025)

Nonlinear Plasmonics with Monocrystalline Gold Metasurface The metasurface controls anisotropic second-harmonic generation from a {111}-type crystalline gold surface. Co- and cross-polarized nonlinear emission is selectively enhanced or silenced depending on the grating orientation with respect to the crystal symmetry axes and the pump polarization. More details can be found in article 2402525 by Sergejs Boroviks and Olivier J. F. Martin.