Local-to-Nonlocal Second-Harmonic Generation from Electrically Tunable Intersubband Polaritonic Metasurfaces.

ABSTRACT: Nonlinear optical metasurfaces enable subwavelength control of light-matter interactions, yet simultaneous tunability of harmonic signal intensity and spectral response remains a fundamental challenge. Here, a local-to-nonlocal second harmonic (SH) generation process is presented, enabled by an electrically tunable polaritonic metasurface, allowing independent control of the SH spectral peak wavelength and intensity. The metasurface combines a localized surface plasmon resonance at the fundamental frequency with a transverse magnetic guided-mode resonance at the SH frequency. By engineering modal overlap within a multiple quantum well layer, voltage-controlled modulation of SH intensity and angle-controlled spectral tuning is achieved, demonstrating two decoupled degrees of freedom associa

SUBMITTER: Kim J 

PROVIDER: S-EPMC12904043 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature