- Letter
Tunable generation and propagation of vortex beams in a photonic chip
Phys. Rev. A 104, L061501 – Published 20 December, 2021
DOI: https://doi.org/10.1103/PhysRevA.104.L061501
Abstract
We used a direct laser writing technique to build annular waveguides inside a glassy blade. These waveguides have shown the capability of generating orbital angular momentum beams with different topological charges in the same structure. Here we demonstrate that, after choosing suitable waveguide parameters, one may tune the topological charge of a beam just by tilting the input wavefront. This work opens opportunities for optical communications using spatial degrees of freedom multiplexed beams and for generation of tunable angular momentum at the microscale for integrability of lab on chips.
