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Time-varying orbital angular momentum generated by a metasurface

April 19, 2023 sarah JonasResearch Results

The orbital angular momentum (OAM) of electromagnetic waves — a kind of “structured light” — is associated with a helical or twisted wavefront. The helical modes are characterized by a topological charge. OAM beams with distinct topological charges are mutually orthogonal, which allows them to carry information and to be multiplexed.