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Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces

Author

Listed:
  • Andrew E. Cardin

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory
    Duke University)

  • Sinhara R. Silva

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

  • Shai R. Vardeny

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

  • Willie J. Padilla

    (Duke University)

  • Avadh Saxena

    (Theoretical Division, Los Alamos National Laboratory)

  • Antoinette J. Taylor

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

  • Wilton J. M. Kort-Kamp

    (Theoretical Division, Los Alamos National Laboratory)

  • Hou-Tong Chen

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

  • Diego A. R. Dalvit

    (Theoretical Division, Los Alamos National Laboratory)

  • Abul K. Azad

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

Abstract

Emerging photonic functionalities are mostly governed by the fundamental principle of Lorentz reciprocity. Lifting the constraints imposed by this principle could circumvent deleterious effects that limit the performance of photonic systems. Most efforts to date have been limited to waveguide platforms. Here, we propose and experimentally demonstrate a spatio-temporally modulated metasurface capable of complete violation of Lorentz reciprocity by reflecting an incident beam into far-field radiation in forward scattering, but into near-field surface waves in reverse scattering. These observations are shown both in nonreciprocal beam steering and nonreciprocal focusing. We also demonstrate nonreciprocal behavior of propagative-only waves in the frequency- and momentum-domains, and simultaneously in both. We develop a generalized Bloch-Floquet theory which offers physical insights into Lorentz nonreciprocity for arbitrary spatial phase gradients, and its predictions are in excellent agreement with experiments. Our work opens exciting opportunities in applications where free-space nonreciprocal wave propagation is desired.

Suggested Citation

  • Andrew E. Cardin & Sinhara R. Silva & Shai R. Vardeny & Willie J. Padilla & Avadh Saxena & Antoinette J. Taylor & Wilton J. M. Kort-Kamp & Hou-Tong Chen & Diego A. R. Dalvit & Abul K. Azad, 2020. "Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15273-1
    DOI: 10.1038/s41467-020-15273-1
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    Cited by:

    1. Geng-Bo Wu & Jun Yan Dai & Kam Man Shum & Ka Fai Chan & Qiang Cheng & Tie Jun Cui & Chi Hou Chan, 2023. "A universal metasurface antenna to manipulate all fundamental characteristics of electromagnetic waves," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    2. Geng-Bo Wu & Jun Yan Dai & Kam Man Shum & Ka Fai Chan & Qiang Cheng & Tie Jun Cui & Chi Hou Chan, 2024. "A synthetic moving-envelope metasurface antenna for independent control of arbitrary harmonic orders," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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