Patent ID: 9529126
Filing Date: 2016-12-27
CPC Classification: G02B

Claim Text:
1. A Fresnel zone plate for encountering incident light having a wavelength, comprising: a substrate defining a generally planar surface; a first set of rings radially spaced about a central axis along the surface of the substrate, the first set of rings being transparent; a second set of rings radially spaced about the central axis along the surface of the substrate, each ring of the second set of rings including a surface lying in a plane perpendicular to the central axis and being opaque; and a plurality of silicon nanowires extending into at least one of the surfaces of the second set of rings, the plurality of silicon nanowires; wherein each of the plurality of silicon nanowires extending along a corresponding axis generally perpendicular to the plane and being spaced from an adjacent silicon nanowire by a distance less than the wavelength of the incident light.