Photonic structure
First Claim
1. A photonic structure comprising:
- a matrix material; and
a plurality of ellipsoids arranged within the matrix material, in which the each of the ellipsoids is defined by a surface that is annealed such that surface diffusion redistributes material on the surface to redefine a shape of the ellipsoid and remove light scattering optical defects from the surface;
in which the ellipsoids and the matrix material comprise different semiconductor materials.
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Accused Products
Abstract
A photonic structure includes a plurality of annealed, substantially smooth-surfaced ellipsoids arranged in a matrix. Additionally, a method of producing a photonic structure is provided. The method includes providing a semiconductor material, providing an etch mask comprising a two-dimensional hole array, and disposing the etch mask on at least one surface of the semiconductor material. The semiconductor material is then etched through the hole array of the etch mask to produce holes in the semiconductor material and thereafter applying a passivation layer to surfaces of the holes. Additionally, the method includes repeating the etching and passivation-layer application to produce a photonic crystal structure that contains ellipsoids within the semiconductor material and annealing the photonic crystal structure to smooth the surfaces of the ellipsoids.
24 Citations
17 Claims
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1. A photonic structure comprising:
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a matrix material; and a plurality of ellipsoids arranged within the matrix material, in which the each of the ellipsoids is defined by a surface that is annealed such that surface diffusion redistributes material on the surface to redefine a shape of the ellipsoid and remove light scattering optical defects from the surface; in which the ellipsoids and the matrix material comprise different semiconductor materials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A photonic structure comprising:
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a semiconductor matrix material; a plurality of substantially spherical closed ellipsoids periodically arranged within the matrix material in two or more dimensions and physically separated by the matrix material;
the ellipsoids comprising;a volume filled with a second semiconductor material having a different index of refraction than the semiconductor matrix; an annealed surface surrounding the volume, the annealed surface comprising redistributed material that smoothes the annealed surface, changes a geometric shape of the annealed surface to reduce the surface energy of the annealed surface and removes light scattering optical defects from the annealed surface; and a coating of oxide material disposed over the annealed surface.
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Specification