  On-chip integrated metasurface driven by in-plane guided waves is of great
interests in various light field manipulation applications such as colorful
augmented reality and holographic display. However, it remains a challenge to
design colorful multichannel holography by a single on-chip metasurface. Here
we present metasurfaces integrated on top of guided-wave photonic slab that
achieves multi-channel colorful holographic light display. An end-to-end scheme
is used to inverse design the metasurface for projecting off-chip preset
multiple patterns. Particular examples are presented for customized patterns
that were encoded into the metasurface with a single-cell meta-atom, working
simultaneously at RGB color channels and for several different diffractive
distance, with polarization dependence. Holographic images are generated at 18
independent channels with such a single-cell metasurface. The proposed design
scheme is easy to implement and the resulting device is viable to fabrication,
promising a plenty of applications in nanophotonics.
