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US 12,659,069 B2Granted
Orbital angular momentum splitting with volumetric meta-optics
AssigneeCalifornia Institute of Technology
InventorsGregory D. Roberts, Andrei Faraon
Life of this patent
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Abstract
Methods and devices to split electromagnetic waves across broad bandwidths in correspondence with orbital angular momentum states combined with orthogonal polarization states are disclosed. The described methods can be used in fiber communication and imaging systems. The devices include three-dimensional (3D) scattering structures that can be using existing CMOS processes and direct write lithography techniques. Performance metrics based on the intensity and contrast of the split electromagnetic waves are also disclosed.
Claims15
An optical arrangement comprising:
- a focal plane;
- a three-dimensional (3D) angular momentum splitter configured to:
- split an incident electromagnetic wave along optical states, the optical states including a plurality of angular momentum states,
- focus the split electromagnetic wave onto target areas corresponding to the plurality of angular momentum states, the target areas being on the focal plane, and
- wherein the 3D angular momentum splitter is made by patterning a 3D volume in accordance with a set pattern calculated by an optimization algorithm used to optimize one or more figures of merit, and wherein the one or more figures of merit are defined based on the plurality of angular momentum states.
2 more elements
Dependencies are inferred from the claim text.