Meta-optical device and electronic device including the same

An electronic device comprising:

• a lens assembly comprising:
• a meta-optical device comprising:
• a substrate;
• a first meta-structure layer provided on the substrate, the first meta-structure layer comprising a first nanostructure having a sub-wavelength shape dimension and a first peripheral material provided adjacent to the first nanostructure;
• a second meta-structure layer provided on the first meta-structure layer, the second meta-structure layer comprising a second nanostructure having the sub-wavelength shape dimension and a second peripheral material provided adjacent to the second nanostructure;
• a first functional layer provided between the first meta-structure layer and the second meta-structure layer, the first functional layer comprising a first layer having an etch rate that is lower than an etch rate of the second peripheral material, and a second layer having a refractive index that is different from a refractive index of the first layer;
• wherein the second layer is configured for meeting a refractive index requirement suitable for antireflection, and
• an image sensor configured to convert an optical image, formed by the lens assembly, into an electrical signal.