Quantum remote control of vortex beams using a metasurface

We propose and experimentally demonstrate a scheme to remotely and continuously control the vortex beam structure using polarization-entangled photon pairs together with a metasurface. With a heralding technique adopted, the spin-orbit coupling provided by the metasurface translates to a tailor-made entanglement of the orbital angular momentum and the polarization of the signal photon. Then, the polarization of the heralding photon is used to remotely control the vortex structure of the signal photon, directly manifested as a continuous orbital rotation. © 2023, META Conference. All rights reserved.