[CMP16A] Metamaterial Devices

[CMP16A-05] Metasurface measuring twisted light in turbulence

Thomas Dinter¹, Lucca Kühner², Chenhao Li², Thomas Weber², Andreas Tittl², Stefan A. Maier^2,3, Judith M. Dawes¹, *Haoran Ren¹ (1. Macquarie University (Australia), 2. Ludwig-Maximilians-University Munich, Munich (Germany), 3. Imperial College London (UK))

[Presentation Style] Online

Practical free-space communication systems suffer from turbulence-induced phase distortions to propagating beams, destroying the orthogonality of orbital angular momentum (OAM) modes used for space-division multiplexing and introducing modal crosstalk. Here we present the design and use of an ultrathin OAM mode-sorting metasurface for investigating the deterioration of OAM orthogonality under different turbulence conditions, offering a compact, fast and efficient way to measure the OAM spectrum.