Affiliation:
1. Universidad Politécnica de Madrid
2. Instituto de Engenharia de Sistemas e Computadores – Microsistemas e Nanotecnologia (INESC MN)
3. University of Granada
Abstract
A transmissive adaptable optical setup to generate a range of perfect vortex beams (PVBs) carrying different topological charges (TC) without using moving parts is presented. The setup is composed of an ad hoc transparent reconfigurable liquid crystal (LC) spiral phase plate (SPP), a refractive axicon and a convergent refractive lens. The LC SPP electrodes are manufactured ablating indium-tin oxide (ITO) glass substrates using direct laser writing (DLW) resulting in a very high fill factor device. In-house tailored electronics drive the 72 LC SPP electrodes giving rise to 72 different configurations with orbital angular momentum. In this work, the generation of PVBs with 36 positive or 36 negative TCs using this optical setup is accomplished.
Funder
European Union’s Horizon 2020 research and innovation programme
European Space Agency
Gobierno de España
Comunidad de Madrid
Subject
Atomic and Molecular Physics, and Optics