Spatially multiplexed concentric discrete optical vortices: Complex topological structures and unconventional rotational dynamics

Precise control over the rotational dynamics of structured lights has become a defining objective in contemporary photonics.

It plays a central role in governing the functional distribution of optical energy.

Particularly, orbital angular momentum driven intensity rotation and azimuthal energy flow in vortex beams have emerged as crucial degrees of freedom in light-matter interactions.

Leveraging this foundation, we establish a discrete optical vortex (DOV) platform comprising concentric rings of phase-locked lasers that enable precise control over vortex-beam rotation.

By engineering the spatial distribution of topological charges (TCs) across the concentric rings of DOVs, we realize shape-invariant asymmetric vortex beams with controllable reversal of intensity rotation, without altering the sign of constituent TCs.

This result establishes a new framework for controlling energy flow in vortex beams, beyond the conventional paradigm that links vortex rotation solely to the sign of the TC.

Such controllable rotational dynamics opens new avenues for programmable beam steering, advanced optical micromanipulation, information multiplexing, and adaptive structured-light systems.