CPC G02B 5/008 (2013.01) [G01S 7/481 (2013.01); G01S 7/4814 (2013.01); G01S 7/4817 (2013.01); G02B 1/002 (2013.01); G02B 1/007 (2013.01); G02B 6/1226 (2013.01); G02B 27/0087 (2013.01); G02F 1/292 (2013.01); G02F 1/3133 (2013.01); G02F 2202/30 (2013.01)] | 12 Claims |
1. A metasurface comprising:
a number of cells arranged on a substrate, each of the cells including:
a high-index dielectric block including an interface between a positively-doped material and a negatively-doped material; and
electrodes configured to provide a voltage differential across the high-index dielectric block to flow current along a current path that passes through the high-index dielectric block, at least a portion of the current path being substantially parallel to a plane defined by the metasurface; and
a controller that dynamically alters a voltage differential supplied to the electrodes of each of the cells to alter a refractive index of each of the high-index dielectric blocks in order to controllably steer light exiting the cell.
|