Ren J, Lin H, Liao Y, Yin H, Li Z, Chen Z, Fu S. Controllable orbital-angular-momentum Hall effect by engineering intrinsic orbit-orbit interaction.
OPTICS LETTERS 2024;
49:646-649. [PMID:
38300080 DOI:
10.1364/ol.511460]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 12/25/2023] [Indexed: 02/02/2024]
Abstract
We report both theoretically and experimentally a process of optical intrinsic orbit-orbit interaction with a vortex-antivortex structure nested in a freely propagating light field. The orbit-orbit interaction is originating from the coupling between different vortices and antivortices. Based on this process, we reveal the resultant controllable orbital-angular-momentum Hall effect by considering a typical structure, which comprises a vortex-antivortex pair and another vortex (or antivortex) as a controllable knob. The intrinsic Hall effect can be spatially manipulated by appropriately engineering the orbit-orbit interaction, namely arranging the initial distribution of these elements. This work can find interesting potential applications. For example, it provides an effective technique for controllable paired photon generation.
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