Optically transparent radio frequency reflectarray devices for beam redirection and broadening

A passive reflectarray comprising:

• an optically transparent substrate that has a thickness in a range from 0.3 millimeters to 1.0 millimeters;
• a metasurface comprising a two-dimensional array of a plurality of resonant patches disposed over the optically transparent substrate, each resonant patch comprising a substantially planar first optically transparent conductor, wherein the first optically transparent conductor has a sheet resistance of less than ten ohms per square and comprises a mesh of microwires, wherein the microwires of the resonant patches have a maximum line width that is less than eight microns, wherein the size of each of the resonant patches is in a size range of from 0.1 millimeters square to 3.5 millimeters square, wherein a first resonant patch of the plurality of resonant patches has a major surface area of a first size, and wherein a second resonant patch of the plurality of resonant patches has a major surface area of a second size;
• and
• an optically transparent ground plane comprising a second optically transparent conductor disposed under the optically transparent substrate, wherein the second optically transparent conductor is substantially planar and has a sheet resistance of less than ten ohms per square and comprises a mesh of microwires, wherein the microwires of the optically transparent ground plane have a maximum line width that is less than eight microns,
• wherein the passive reflectarray has an optical transmittance that is eighty percent or more in a visible wavelength band from 380 nanometers to 780 nanometers.