METHOD FOR PRODUCTION OF OPTICAL WAVEGUIDES AND COUPLING AND DEVICES MADE FROM THE SAME
First Claim
1. A method for producing a high-refractive index contrast and low loss optical waveguide, the method comprising the steps of:
- depositing or growing a first low refractive index material layer as a cladding layer on top of a silicon base substrate;
depositing or transferring a first high refractive index material layer on top of the first low refractive index material layer to form a slab core region;
depositing a second high refractive index material layer on top of the slab core region;
forming an etch mask layer on the second high refractive index material layer;
selectively etching the second high refractive index material layer by utilizing a dry-etching tool with high selectivity to the etch mask layer; and
depositing a second low refractive index material layer as a top cladding layer to encapsulate the second high refractive index material layer on top of lower cladding layers.
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Abstract
Novel processing methods for production of high-refractive index contrast and low loss optical waveguides are disclosed. In one embodiment, a novel waveguide is produced by first depositing or growing a first low refractive index material layer as a cladding layer on top of a base substrate. Then, a first high refractive index material layer is deposited or transferred to the top of the cladding layer to form a slab core region. Subsequently, a second high refractive index material layer is deposited on top of the slab core region, and an etch mask layer is formed. Furthermore, the second high refractive index material layer is selectively etched by utilizing a dry-etching tool with high selectivity to the etch mask layer, and a second low refractive index material layer is deposited as a top cladding layer to encapsulate the second high refractive index material layer on top of lower cladding layers.
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7 Claims
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1. A method for producing a high-refractive index contrast and low loss optical waveguide, the method comprising the steps of:
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depositing or growing a first low refractive index material layer as a cladding layer on top of a silicon base substrate; depositing or transferring a first high refractive index material layer on top of the first low refractive index material layer to form a slab core region; depositing a second high refractive index material layer on top of the slab core region; forming an etch mask layer on the second high refractive index material layer; selectively etching the second high refractive index material layer by utilizing a dry-etching tool with high selectivity to the etch mask layer; and depositing a second low refractive index material layer as a top cladding layer to encapsulate the second high refractive index material layer on top of lower cladding layers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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