Multifunctional metasurface flat optics

A multifunctional optic comprising:

• a first transparent substrate;
• a second transparent substrate spaced apart from the first transparent substrate;
• a first metasurface comprising a first plurality of meta-atoms disposed on a first surface of the first transparent substrate;
• and
• a second metasurface comprising a second plurality of meta-atoms disposed on a second surface of the second transparent substrate,
• wherein the first metasurface and the second metasurface are configured to focus first incident light in a first state to an image plane with a first magnification or to perform a first optical function and to focus second incident light in a second state different than the first state to the image plane with a second magnification different than the first magnification or to perform a second optical function that is different from the first optical function, and
• wherein relative positions of the first transparent substrate, the second transparent substrate, and the image plane remain unchanged when focusing the first incident light in the first state and focusing the second incident light in the second state.