Electrically-activated spin-controlled orbital angular momentum multiplexer
Abstract
We present and test the integration of a static orbital angular momentum mode multiplexer with a dynamical geometric-phase optical element enabling on-demand spin-controlled angular momentum multiplexing. A diffractive optics multiplexer fabricated with 3D high-resolution electron beam lithography performs a conformal mapping for the conversion from linear to azimuthal phase gradients. The latter is functionalized by a dynamic spin-orbit add-on that consists of a self-engineered electrically-activated liquid crystal optical vortex generator having large clear-aperture and high-resolution. By combining several functionalities based on the optical angular momentum of light in a compact manner, the proposed hybrid device could find applications in next-generation high-dimensional mode switchers and routers based on orbital angular momentum.
Cite
@article{arxiv.1803.09917,
title = {Electrically-activated spin-controlled orbital angular momentum multiplexer},
author = {Gianluca Ruffato and Etienne Brasselet and Michele Massari and Filippo Romanato},
journal= {arXiv preprint arXiv:1803.09917},
year = {2018}
}