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 neuromorphic vision sensors and live image processing applications.
Fields of Study & Subjects
Metamaterials and Metasurfaces Applications
Neural Networks and Reservoir Computing
Plasmonic and Surface Plasmon Research
Publication details
- Journal / source
- ACS Omega
- Publisher
- American Chemical Society (ACS)
- Volume
- 11
- Issue
- 2
- Pages
- 3311–3318
- Publication date
- 6 January 2026
- Language
- EN