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BROADBAND FLAT OPTICAL ELEMENTS AND METHODS OF MANUFACTURE

Flat optical elements including a multi-level metasurface stack having two or more metasurface levels. Each metasurface level includes an arrangement of nanostructures, or protrusions, of one or more optically transmissive materials. A metasurface level may further include another optically transmissive material between the nanostructures, achieving a desired index contrast. Another metasurface level including additional nanostructures may be over a planar surface of this additional transmissive material. Another optically transmissive material may be between the additional nanostructures. This architecture may be followed for any number of levels, (e.g., a bi-layer, tri-layer, etc.). Each metasurface within the multi-level metasurface structure may be tuned to a particular optical wavelength. Such a multi-level metasurface may have greater bandwidth and/or achieve higher optical efficiency for a given band than a single metasurface. Molding techniques may be employed in metasurface fabrication to reduce the starting material cost and fabrication cost.


» Number: US2019033683A1 (A1)

» Publication Date: 19//2/31/0

» Applicant: INTEL CORP?[US]

» Inventor: AHMED KHALED?[US]; HICKS RICHMOND?[US]

» More Information

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [310187].