Multi-channel visible light communication system

A multi-channel visible light communication system, comprising:

• a carrier board;
• and
• a plurality of light-emitting device stacks, arranged over the carrier board, wherein each of the plurality of light-emitting device stacks comprises:
• a first light-emitting device comprising a plurality of first conductive pads;
• a second light-emitting device disposed over the first light-emitting device and comprising a plurality of second conductive pads, wherein the plurality of first conductive pads are electrically isolated from the plurality of second conductive pads;
• and
• a first adhesive layer, disposed between the first light-emitting device and the second light-emitting device, where the first adhesive layer comprises a first metasurface, the first metasurface of the first adhesive layer comprises:
• a first substrate;
• and
• a plurality of first antennas protruding upward from the first substrate;
• and
• a first refractive index matching layer covering upper surfaces and all side faces of the plurality of first antennas of the first metasurface.