Patent ID: 9678406
Date: 2017-06-13
CPC Classifications: G02F

Claim:
1. An optical switch comprising: a plate; a first slit formed in the plate; a second slit formed in the plate separately from the first slit; a plurality of first grooves formed on the plate, on a first side of the first slit, between the first slit and the second slit; and a plurality of second grooves formed on the plate on a second side of the first slit, opposite the first side, wherein, when first light is incident on the first slit, second light is incident on the second slit, and there is a phase difference between the first light and the second light, a focusing of the first light is turned on and off by controlling the second light wherein each of the plurality of first grooves and each of the plurality of second grooves is formed to a depth less than a depth of the plate from the first face of the plate to the second face of the plate, such that none of the plurality of first grooves and the plurality of second grooves fully penetrates the plate.