Device including transparent layer with profiled surface for improved extraction
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United States of America Patent
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Mar 6, 2018
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app pub date -
May 9, 2016
filing date -
Jun 15, 2011
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Abstract
A profiled surface for improving the propagation of radiation through an interface is provided. The profiled surface includes a set of large roughness components providing a first variation of the profiled surface having a characteristic scale approximately an order of magnitude larger than a target wavelength of the radiation. The set of large roughness components can include a series of truncated shapes. The profiled surface also includes a set of small roughness components superimposed on the set of large roughness components and providing a second variation of the profiled surface having a characteristic scale on the order of the target wavelength of the radiation.
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