Process for fabrication of high reflectors by reversal of layer sequence and application thereof
First Claim
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1. An optical reflector comprising:
- an optical reflective element that includes alternating layers of high and low index layers are formed on a first semiconductor substrate; and
a new substrate that is bonded on said optical reflective element, whereinthe sequence of layers in the reflective element is reversed in order such that the layers grown first with lowest surface roughness are exposed to the highest electric field strength, and the layer grown last, of highest roughness, is buried deep in the multilayer stack, and said first semiconductor substrate that is adjacent to the first layer of lowest surface roughness is removed.
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Abstract
An optical reflector includes an optical reflective element that comprises alternating layers of high and low index layers. A new substrate is bonded on the optical reflective element. The sequence of layers in the reflective element is reversed in order such that the layers grown first with lowest surface roughness are exposed to the highest electric field strength, and the layer grown last, of highest roughness, are buried deep in the multilayer stack.
34 Citations
11 Claims
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1. An optical reflector comprising:
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an optical reflective element that includes alternating layers of high and low index layers are formed on a first semiconductor substrate; and a new substrate that is bonded on said optical reflective element, wherein the sequence of layers in the reflective element is reversed in order such that the layers grown first with lowest surface roughness are exposed to the highest electric field strength, and the layer grown last, of highest roughness, is buried deep in the multilayer stack, and said first semiconductor substrate that is adjacent to the first layer of lowest surface roughness is removed. - View Dependent Claims (2, 3, 4, 5)
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6. An optical device comprising:
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an optical reflective element that includes alternating layers of high and low index layers formed on a first semiconductor substrate; and a new substrate that is bonded on said optical reflective element, wherein the sequence of layers in the reflective element is reversed in order such that the layers grown first with lowest surface roughness are exposed to the highest electric field strength, and the layer grown last, of highest roughness, is buried deep in the multilayer stack, and said first semiconductor substrate that is adjacent to the first layer of lowest surface roughness is removed. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification