Metasurfaces for redirecting light and methods for fabricating
First Claim
1. A display system comprising:
- a waveguide;
a light incoupling optical element disposed on a surface of the waveguide and configured to incouple light into the waveguide, the light incoupling optical element comprising;
a multilevel metasurface comprising;
a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material, wherein the first optically transmissive material comprises a resist; and
a second optically transmissive material over and between the spaced apart protrusions,wherein the waveguide is one of a stack of waveguides, wherein each of the stack of waveguides comprises an associated multilevel metasurface.
3 Assignments
0 Petitions
Accused Products
Abstract
A display system comprises a waveguide having light incoupling or light outcoupling optical elements formed of a metasurface. The metasurface is a multilevel (e.g., bi-level) structure having a first level defined by spaced apart protrusions formed of a first optically transmissive material and a second optically transmissive material between the protrusions. The metasurface also includes a second level formed by the second optically transmissive material. The protrusions on the first level may be patterned by nanoimprinting the first optically transmissive material, and the second optically transmissive material may be deposited over and between the patterned protrusions. The widths of the protrusions and the spacing between the protrusions may be selected to diffract light, and a pitch of the protrusions may be 10-600 nm.
121 Citations
39 Claims
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1. A display system comprising:
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a waveguide; a light incoupling optical element disposed on a surface of the waveguide and configured to incouple light into the waveguide, the light incoupling optical element comprising; a multilevel metasurface comprising; a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material, wherein the first optically transmissive material comprises a resist; and a second optically transmissive material over and between the spaced apart protrusions, wherein the waveguide is one of a stack of waveguides, wherein each of the stack of waveguides comprises an associated multilevel metasurface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17, 18, 39)
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9. A display system comprising:
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a waveguide; a light incoupling optical element disposed on a surface of the waveguide and configured to incouple light into the waveguide, the light incoupling optical element comprising; a multilevel metasurface comprising; a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material; and a second optically transmissive material over and between the spaced apart protrusions, wherein the waveguide is one of a stack of waveguides, wherein each of the stack of waveguides comprises an associated multilevel metasurface, wherein the second optically transmissive material has a higher refractive index than either the first optically transmissive material or material forming the waveguide. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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19. A display system comprising:
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a waveguide; a light incoupling optical element disposed on a surface of the waveguide and configured to incouple light into the waveguide, the light incoupling optical element comprising; a multilevel metasurface comprising; a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material; and a second optically transmissive material over and between the spaced apart protrusions, wherein the waveguide is one of a stack of waveguides, wherein each of the stack of waveguides comprises an associated multilevel metasurface, wherein the second optically transmissive material has a higher refractive index than both the first optically transmissive material and the material forming the waveguide, wherein the first optically transmissive material has a lower refractive index than the material forming the waveguide. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification