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Wavefront shaping through emulated curved space in waveguide settings

Author

Listed:
  • Chong Sheng

    (National Laboratory of Solid State Microstructures & School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Rivka Bekenstein

    (Department of Physics and Solid State Institute)

  • Hui Liu

    (National Laboratory of Solid State Microstructures & School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Shining Zhu

    (National Laboratory of Solid State Microstructures & School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Mordechai Segev

    (Department of Physics and Solid State Institute)

Abstract

The past decade has witnessed remarkable progress in wavefront shaping, including shaping of beams in free space, of plasmonic wavepackets and of electronic wavefunctions. In all of these, the wavefront shaping was achieved by external means such as masks, gratings and reflection from metasurfaces. Here, we propose wavefront shaping by exploiting general relativity (GR) effects in waveguide settings. We demonstrate beam shaping within dielectric slab samples with predesigned refractive index varying so as to create curved space environment for light. We use this technique to construct very narrow non-diffracting beams and shape-invariant beams accelerating on arbitrary trajectories. Importantly, the beam transformations occur within a mere distance of 40 wavelengths, suggesting that GR can inspire any wavefront shaping in highly tight waveguide settings. In such settings, we demonstrate Einstein’s Rings: a phenomenon dating back to 1936.

Suggested Citation

  • Chong Sheng & Rivka Bekenstein & Hui Liu & Shining Zhu & Mordechai Segev, 2016. "Wavefront shaping through emulated curved space in waveguide settings," Nature Communications, Nature, vol. 7(1), pages 1-8, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10747
    DOI: 10.1038/ncomms10747
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