On-chip integrated metasystem for spin-dependent multi-channel color holography

Area of Science:

• Nanophotonics and Metasurface Technology
• Optical Engineering and Light Manipulation

Background:

• On-chip integrated metasurfaces driven by guided waves are crucial for light-field manipulation in applications like augmented reality and holographic displays.
• Designing single on-chip metasurfaces for colorful, multichannel holography presents significant engineering challenges.

Purpose of the Study:

• To present a novel metasurface integrated on a guided-wave photonic slab for multi-channel colorful holographic light display.
• To demonstrate an inverse design scheme for creating metasurfaces capable of projecting multiple off-chip patterns.

Main Methods:

• An end-to-end inverse design scheme was employed to engineer the metasurface.
• A single-cell meta-atom was utilized to encode customized patterns for simultaneous operation across RGB color channels and multiple diffraction distances.
• The metasurface's polarization dependence was characterized.

Main Results:

• The developed metasurface successfully generated holographic images across 18 independent channels.
• The single-cell meta-atom design achieved simultaneous operation at Red, Green, and Blue (RGB) color channels.
• The device demonstrated functionality for several different diffractive distances with polarization dependence.

Conclusions:

• The proposed metasurface design enables multi-channel colorful holographic display with a single on-chip device.
• The inverse design scheme is practical for fabrication and offers a viable path for advanced nanophotonic applications.
• This technology holds promise for future developments in holographic displays and augmented reality systems.