Vanadium-compensated 4H and 6H single crystals of optical grade, and silicon carbide crystals and methods for producing same

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United States of America

PATENT NO 12060650
SERIAL NO

17249395

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Abstract

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An optical device includes a vanadium compensated, high resistivity, SiC single crystal of 6H or 4H polytype, for transmitting light having a wavelength in a range of from 420 nm to 4.5 μm. The device may include a window, lens, prism, or waveguide. A system includes a source for generating light having a wavelength in a range of from 420 nm to 4.5 μm, and a device for receiving and transmitting the light, where the device includes a vanadium compensated, high resistivity, SiC single crystal of 6H or 4H polytype. The disclosure also relates to crystals and methods for optical applications, including an aluminum doped SiC crystal having residual nitrogen and boron impurities, where the aluminum concentration is greater than the combined concentrations of nitrogen and boron, and where an optical absorption coefficient is less than about 0.4 cm−1 at a wavelength between about 400 nm to about 800 nm.

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Patent OwnerAddress
II-VI ADVANCED MATERIALS LLC20 CHAPIN ROAD SUITE 1007 P O BOX 840 PINE BROOK NJ 07058

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rengarajan, Varatharajan Flanders, US 19 90
Ruland, Gary Morris Plains, US 3 9
Souzis, Andrew E Ramsey, US 11 106
Zwieback, Ilya Twp. of Washington, US 38 308

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