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Point singularity array with metasurfaces

Author

Listed:
  • Soon Wei Daniel Lim

    (Harvard John A. Paulson School of Engineering and Applied Sciences)

  • Joon-Suh Park

    (Harvard John A. Paulson School of Engineering and Applied Sciences
    Nanophotonics Research Center, Korea Institute of Science and Technology)

  • Dmitry Kazakov

    (Harvard John A. Paulson School of Engineering and Applied Sciences)

  • Christina M. Spägele

    (Harvard John A. Paulson School of Engineering and Applied Sciences)

  • Ahmed H. Dorrah

    (Harvard John A. Paulson School of Engineering and Applied Sciences)

  • Maryna L. Meretska

    (Harvard John A. Paulson School of Engineering and Applied Sciences)

  • Federico Capasso

    (Harvard John A. Paulson School of Engineering and Applied Sciences)

Abstract

Phase singularities are loci of darkness surrounded by monochromatic light in a scalar field, with applications in optical trapping, super-resolution imaging, and structured light-matter interactions. Although 1D singular structures, like optical vortices, are common due to their robust topological properties, uncommon 0D (point) and 2D (sheet) singularities can be generated by wavefront-shaping devices like metasurfaces. With the design flexibility of metasurfaces, we deterministically position ten identical point singularities using a single illumination source. The phasefront is inverse-designed using phase-gradient maximization with an automatically-differentiable propagator and produces tight longitudinal intensity confinement. The array is experimentally realized with a TiO2 metasurface. One possible application is blue-detuned neutral atom trap arrays, for which this field would enforce 3D confinement and a potential depth around 0.22 mK per watt of incident laser power. We show that metasurface-enabled point singularity engineering may significantly simplify and miniaturize the optical architecture for super-resolution microscopes and dark traps.

Suggested Citation

  • Soon Wei Daniel Lim & Joon-Suh Park & Dmitry Kazakov & Christina M. Spägele & Ahmed H. Dorrah & Maryna L. Meretska & Federico Capasso, 2023. "Point singularity array with metasurfaces," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39072-6
    DOI: 10.1038/s41467-023-39072-6
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    References listed on IDEAS

    as
    1. Waseem S. Bakr & Jonathon I. Gillen & Amy Peng & Simon Fölling & Markus Greiner, 2009. "A quantum gas microscope for detecting single atoms in a Hubbard-regime optical lattice," Nature, Nature, vol. 462(7269), pages 74-77, November.
    2. Soon Wei Daniel Lim & Joon-Suh Park & Maryna L. Meretska & Ahmed H. Dorrah & Federico Capasso, 2021. "Engineering phase and polarization singularity sheets," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    3. Peng Zhang & Tongcang Li & Jie Zhu & Xuefeng Zhu & Sui Yang & Yuan Wang & Xiaobo Yin & Xiang Zhang, 2014. "Generation of acoustic self-bending and bottle beams by phase engineering," Nature Communications, Nature, vol. 5(1), pages 1-9, September.
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