Back to results
US 10,883,799 B1Granted
Metasurface skin cloak
AssigneeThe Regents of the University of California
InventorsXingjie Ni, Yuan Wang, Xiang Zhang
Life of this patent
Estimating the term…
Abstract
This disclosure provides systems, methods, and devices related to a metasurface skin cloak. In one aspect, a metasurface skin cloak includes a dielectric layer and a plurality of blocks disposed on the dielectric layer. The dielectric layer is disposed over a surface including a feature on the surface. Each block of the plurality of blocks has a shape that is symmetric about two perpendicular axes. The metasurface skin can render the feature on the surface not optically detectable.
Claims20
A device comprising:
- a reflective layer disposed on a surface, the surface including a feature on the surface;
- a dielectric layer, the dielectric layer disposed on the reflective layer;
- and
- a plurality of blocks disposed on the dielectric layer, each block of the plurality of blocks having a shape that is symmetric about two perpendicular axes;
- a thickness of the dielectric layer and a thickness of the plurality of blocks being specified so that the reflectivity of the surface and the plurality of blocks for electromagnetic radiation is greater than about 85%, the electromagnetic radiation being a specified range of wavelengths of electromagnetic radiation, the dimensions of each block of the plurality of blocks being specified to have a reflectivity of the electromagnetic radiation that is the same as a reflectivity of the surface that each block of the plurality of blocks is overlying and dimensions of each block of the plurality of blocks being specified so that each block is operable to introduce a phase shift in the electromagnetic radiation that is reflected from the surface so that the phase of the reflected electromagnetic radiation is the same as if the reflected electromagnetic radiation were reflected from a flat surface not including the feature.
2 more elements
A method comprising:
- (a) depositing a reflective layer on a surface, the surface including a feature;
- (b) measuring a two dimensional height profile of the surface;
- (c) determining a thickness of a dielectric layer and a thickness of a plurality of blocks disposed thereon so that the surface with the plurality of blocks disposed thereon has a reflectivity of at least about 85% for electromagnetic radiation, the electromagnetic radiation being a specified range of wavelengths of electromagnetic radiation;
- (d) determining dimensions of each block of the plurality of blocks needed to introduce a phase shift in the electromagnetic radiation that is reflected from the surface so that the phase of the reflected electromagnetic radiation is the same as if the reflected electromagnetic radiation were reflected from a flat surface not including the feature;
- (e) determining the dimensions of each block of the plurality of blocks needed to have a reflectivity of the electromagnetic radiation that is the same as a reflectivity of the surface that each block of the plurality of blocks is overlying so that the reflected electromagnetic radiation has the same amplitude;
- (f) depositing the dielectric layer on the reflective layer having the thickness determined in operation (c);
- (g) depositing a material having a thickness determined in operation (c) on the dielectric layer;
- and
- (h) removing portions of the material to form the plurality of blocks having the dimensions determined in operation (d) and (e), each block of the plurality of blocks having a shape that is symmetric about two perpendicular axes.
6 more elements
A method comprising:
- (a) depositing a reflective layer on a surface, the surface including a feature;
- (b) measuring a two dimensional height profile of the surface;
- (c) determining a thickness of a dielectric layer and a thickness of a plurality of blocks disposed thereon so that the surface with the plurality of blocks disposed thereon has a reflectivity of at least about 85% for electromagnetic radiation, the electromagnetic radiation being a specified range of wavelengths of electromagnetic radiation;
- (d) determining dimensions of each block of the plurality of blocks needed to introduce a phase shift in the electromagnetic radiation that is reflected from the surface so that the phase of the reflected electromagnetic radiation is the same as if the reflected electromagnetic radiation were reflected from a flat surface not including the feature;
- (e) determining the dimensions of each block of the plurality of blocks needed to have a reflectivity of the electromagnetic radiation that is the same as a reflectivity of the surface that each block of the plurality of blocks is overlying so that the reflected electromagnetic radiation has the same amplitude;
- (f) depositing the dielectric layer having the thickness determined in operation (c) on the reflective layer;
- and
- (g) forming the plurality of blocks on the dielectric layer, the plurality of blocks having the thickness determined in operation (c), each block of the plurality of blocks having dimensions as determined in operations (d) and (e), each block of the plurality of blocks having a shape that is symmetric about two perpendicular axes.
5 more elements
Dependencies are inferred from the claim text.