Superlens and a method for making the same
First Claim
1. An apparatus suitable for controlling the size and the phase of an electromagnetic beam, the apparatus comprising:
- a. a substrate; and
b. a vertically Graded Refractive index (vGRIN) multilayer structure deposited on the substrate, the multilayer structure including a vGRIN film and a curved input sidewall and a curved output sidewall, the input sidewall being a sidewall on which the electromagnetic beam is incident on the apparatus, the output sidewall being a sidewall through which the electromagnetic beam leaves the apparatus, wherein the apparatus is used to independently control a vertical focusing and a horizontal focusing of the electromagnetic beam, wherein the vGRIN film has a refractive index distribution n(y), where y is a vertical direction substantially perpendicular to the direction of propagation of the electromagnetic beam.
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Accused Products
Abstract
A superlens for controlling the size and the phase of an electromagnetic beam that passes through it, and a method for independently controlling the horizontal and vertical focusing of the electromagnetic beam using the superlens is provided. The superlens comprises a vertically GRIN multi-layer structure with one or more horizontally curved sidewalls. The vertical focusing is controlled by varying the longitudinal thickness of the multi-layer structure. The horizontal focusing is controlled by varying the profile and the radius of curvature of the horizontally curved sidewalls. Varying the thickness and radius of curvature is done by etching. Also provided is a method for making the superlens.
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Citations
29 Claims
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1. An apparatus suitable for controlling the size and the phase of an electromagnetic beam, the apparatus comprising:
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a. a substrate; and b. a vertically Graded Refractive index (vGRIN) multilayer structure deposited on the substrate, the multilayer structure including a vGRIN film and a curved input sidewall and a curved output sidewall, the input sidewall being a sidewall on which the electromagnetic beam is incident on the apparatus, the output sidewall being a sidewall through which the electromagnetic beam leaves the apparatus, wherein the apparatus is used to independently control a vertical focusing and a horizontal focusing of the electromagnetic beam, wherein the vGRIN film has a refractive index distribution n(y), where y is a vertical direction substantially perpendicular to the direction of propagation of the electromagnetic beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification