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Programmable Meta-Holography Dynamics Enabled by Grating-Modulation
Photonics Research- received 01/30/2024; accepted 05/07/2024; posted 05/07/2024; Doc. ID 520021
- Abstract: Towards the next-generation intelligent display devices, it is urgent to find a cheap and convenient dynamic optical control method. Conventional gratings are widely used as cheap diffractive elements due to their effective optical control capabilities. However, they are limited for multi-function or complex optical modulation due to the lack of the accurate control of the amplitude/phase at pixel-level. Here, the metasurface-assisted grating-modulation system is originally proposed to achieve switchable multi-fold meta-holographic dynamics. By incorporating metasurface with traditional gratings and tuning their relative coupling positions, the modulation system gains the optical modulation capability to realize complex optical functionalities. Specifically, by varying the grating periods/positions relative to the metasurface, 2-8 holographic image channels are programmed to be dynamically exhibited and switched. The proposed metasurface-assisted grating-modulation approach enjoys cost-effective convenience, strong encoding freedom, and facile operation, which promises programmable optical display, optical sensors, optical information encryption/storage, etc.