	US 12,422,590 B2
	Metasurface for far-field beam characteristic control of micro light emitting diodes
Zhaocheng Liu, Redmond, WA (US); and Zhaoyu Nie, Kenmore, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Dec. 2, 2022, as Appl. No. 18/073,849.
Claims priority of provisional application 63/388,200, filed on Jul. 11, 2022.
Prior Publication US 2024/0012176 A1, Jan. 11, 2024
Int. Cl. G02B 1/00 (2006.01)

CPC G02B 1/002 (2013.01) [G02B 2207/101 (2013.01)]

20 Claims

1. A system, comprising:

a processor; and

a memory storing processor-executable instructions that, when executed by the processor, cause the processor to:

define a far-field objective function for light emitted by a micro light emitting diode (μLED),

select a shape for a metasurface unit cell;

determine one or more of a number or a location of metasurface unit cells with the selected shape employing an adjoint simulation technique; and

select values of shape parameters for the metasurface unit cells employing a shape optimization technique.