Multilayer wire-grid polarizer with off-set wire-grid and dielectric grid
DCFirst Claim
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1. A wire-grid polarizer device for polarizing light, comprising:
- a) a substrate;
b) a wire-grid layer, disposed over the substrate, the wire-grid layer including an array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light and defining gaps between the elements; and
c) a plurality of contiguous dielectric-grid layers contiguous with one another, disposed directly on top of the wire-grid layer, each dielectric-grid layer including an array of dielectric material elements, the plurality of contiguous dielectric-grid layers including different materials with different indices of refraction; and
d) the array of dielectric material elements and the array of metal elements being oriented substantially parallel with one another, and the arrays having substantially equal periods.
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Abstract
A wire-grid polarizer includes a wire-grid layer disposed over a substrate. A plurality of contiguous dielectric-grid layers are contiguous with one another and disposed directly on top of the wire-grid layer. The plurality of contiguous dielectric-grid layers includes different materials with different indices of refraction. The array of dielectric material elements and the array of metal elements are oriented substantially parallel with one another, and the arrays having substantially equal periods.
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Citations
23 Claims
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1. A wire-grid polarizer device for polarizing light, comprising:
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a) a substrate; b) a wire-grid layer, disposed over the substrate, the wire-grid layer including an array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light and defining gaps between the elements; and c) a plurality of contiguous dielectric-grid layers contiguous with one another, disposed directly on top of the wire-grid layer, each dielectric-grid layer including an array of dielectric material elements, the plurality of contiguous dielectric-grid layers including different materials with different indices of refraction; and d) the array of dielectric material elements and the array of metal elements being oriented substantially parallel with one another, and the arrays having substantially equal periods. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wire-grid polarizer device for polarizing light, comprising:
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a) a substrate; b) a stack of thin film layers, disposed over the substrate, and extending continuously across the substrate; c) at least one of the thin film layers being uniform in structure and material; d) at least one of the thin film layers including a wire-grid array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light and a period less than half the wavelength of the light and defining gaps between the elements; and e) at least two of the thin film layers including contiguous dielectric arrays of dielectric material elements disposed directly on top of the wire-grid array, wherein the dielectric array of dielectric material elements and the wire-grid array of elongated metal elements are oriented substantially parallel with one another and the arrays have substantially equal periods, and wherein, the contiguous dielectric arrays include different materials with different indices of refraction. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification