Multi-wavelength optical dielectric metasurfaces
First Claim
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1. A structure comprising:
- a substrate;
a first plurality of scattering elements on the substrate, the first plurality of scattering elements having first geometrical dimensions for the scattering elements; and
a second plurality of scattering elements on the substrate, the second plurality of scattering elements having second geometrical dimensions for the scattering elements, the second geometrical dimensions being different from the first geometrical dimensions,wherein the first plurality of scattering elements are arranged in first four sectors and the second plurality of scattering elements are arranged in second four sectors spatially separated from the first four sectors.
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Abstract
Structures for scattering light at multiple wavelengths are disclosed. Scattering elements are fabricated with different geometric dimensions and arrangements, to scatter or focus light at the same focal distance for each wavelength, or at different focal distances according to the desired application. Scattering elements can be circular or elliptical posts, allowing polarization dependent scattering. The elements can have different orientations to scatter light from multiple wavelengths at the desired focal length.
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18 Claims
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1. A structure comprising:
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a substrate; a first plurality of scattering elements on the substrate, the first plurality of scattering elements having first geometrical dimensions for the scattering elements; and a second plurality of scattering elements on the substrate, the second plurality of scattering elements having second geometrical dimensions for the scattering elements, the second geometrical dimensions being different from the first geometrical dimensions, wherein the first plurality of scattering elements are arranged in first four sectors and the second plurality of scattering elements are arranged in second four sectors spatially separated from the first four sectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A structure comprising:
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a substrate; a first plurality of scattering elements on the substrate, the first plurality of scattering elements having first geometrical dimensions for the scattering elements; a second plurality of scattering elements on the substrate, the second plurality of scattering elements having second geometrical dimensions for the scattering elements, the second geometrical dimensions being different from the first geometrical dimensions; and a third plurality of scattering elements on the substrate, the third plurality of scattering elements having third geometrical dimensions for the scattering elements, the third geometrical dimensions being different from the first and the second geometrical dimensions.
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15. A method comprising:
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providing a substrate; fabricating a first plurality of scattering elements on the substrate according to first geometric dimensions, to scatter light at a first wavelength; and fabricating a second plurality of scattering elements on the substrate according to second geometric dimensions, to scatter light at a second wavelength, wherein; the first geometric dimensions are different from the second geometric dimensions, and the first wavelength is different from the second wavelength, and the first plurality of scattering elements are arranged in first four sectors and the second plurality of scattering elements are arranged in second four sectors spatially separated from the first four sectors. - View Dependent Claims (16, 17, 18)
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Specification