Optical Vortex Lattice

Tight-focus mode reconstruction

Elucidates modal evolution under propagation and tight focusing for various topological charge arrangements, providing a theoretical basis for high-dimensional light control and multi-channel communication.

Xuanquan, Wang · Yawei, Tan · Qiang, Zhou · Sheng, Lijuan · Wang, Zhiteng · Ling, Xiaohui

Physics Letters, Section A: General, Atomic and Solid State Physics 2026

Advantages

Predictable mode reconstruction

Under tight focusing, significant mode reconstruction arises due to spin-orbit interactions, and the topological charge distribution evolves in a manner closely tied to the initial OAM configuration, enabling prediction.

Stable modes in propagation

During free-space propagation, the OAM mode composition remains unchanged, and the field evolution is governed mainly by phase changes, suitable for long-distance transmission.

Applications

• Structured Light：Exploit tight-focusing mode reconstruction for high-dimensional light field control.
• Quantum Information：Lattices of multiple OAM modes can encode high-dimensional quantum states.
• Optical Communications：Lattice fields can carry multiple OAM channels for communication.