Ultrafast Optically Tunable GaAs Metasurfaces for Analog Image Processing.

ABSTRACT: Optical metasurfaces offer unprecedented potential for miniaturizing conventional bulk optics into compact, energy-efficient devices suitable for advanced edge computing applications. However, current implementations lack the dynamic tunability essential for real-time optical processing functions. Here, we numerically demonstrate a gallium arsenide metasurface that achieves subpicosecond switching between dual complex-valued transfer functions through ultrafast photoinduced carrier modulation. Our device exploits specially designed Mie-resonant nanoantennas for nonuniform amplitude and phase profile change under pump pulses with typical energies about 4.8 nJ. The metasurface enables real-time Fourier filtering with switching frequency exceeding 100 GHz, providing a pathway to ultrafast neu

SUBMITTER: Yushkov VV 

PROVIDER: S-EPMC12824971 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature