4.6 Article

Sorting full angular momentum states with Pancharatnam-Berry metasurfaces based on spiral transformation

Journal

OPTICS EXPRESS
Volume 28, Issue 11, Pages 16342-16351

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.393859

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Funding

  1. National Key R&D Program of China [2019YFA0706302, 2018YFB1801800]
  2. National Natural Science Foundation of China (NSFC) [U1701661, 11774437]
  3. Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01X121]
  4. Science and Technology Program of Guangzhou [201804010302]

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Full angular momentum states constitute a complete and higher state space of a photon, which are significant not only for fundamental study of light but also for practical applications utilizing cylindrical optics such as optical fibers. Here we propose and demonstrate a simple yet effective scheme of combining the spiral transformation with Pancharatnam-Berry (PB) metasurfaces for high-resolution sorting of full angular momentum states. The scheme is verified by successfully sorting full angular momentum states with 7 orbital angular momentum states and 2 spin angular momentum states via numerical simulations and experiments. We expect that our work paves the way for simple high-resolution sorting of full angular momentum states, which could be highly useful in both classical and quantum information systems. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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