Realization of A Novel Fibonacci Metasurface and K-space Imaging of Interference Pattern of Surface Plasmon Polariton

ORAL

Abstract

Metasurface is an artificial surface structure which are composed of, in general, period structure of metal or dielectric material to enable a spatially varying electromagnetic response, molding optical wavefronts or modulating surface plasmon polaritons (SPPs) [1, 2]. A Fibonacci sequence is defined mathematically as {Sn} where Sn+1 = Sn, Sn-1. If one creates a real space structure following the Fibonacci sequence, then the structure would not be periodic yet containing a long range order, in a manner similar to a quasicrystal whose structure is ordered but not periodic [3]. In this work, we fabricated Fibonacci sequence nanogrooves on epitaxial silver film via focus ion beam. Based on the angle-resolved reflectance mapping, we show multiple scattering of in-plane lattice-SPPs resulting from the hierarchial Fourier components of the Fibonacci sequence. It opens a way to understand coherent scattering in an ordered yet non-periodic structure.


References.
1. Kildishev, A. V., Boltasseva, A. and Shalaev, V. M.. Science 339, 1289 (2013)
2. Li, G., Zhang, S. and Zentgraf T.. Nature Rev. Mat. 2, 17010 (2017)
3. Shechtman, D. et al.. Phys. Rev. Lett. 53, 1951 (1984)

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Presenters

  • Chun Yuan Wang

    Department of Physics, The University of Texas at Austin, Austin, Texas, 78712, USA., Department of Physics, The University of Texas at Austin, Department of Physics, The University of Texas at Austin, USA

Authors

  • Chun Yuan Wang

    Department of Physics, The University of Texas at Austin, Austin, Texas, 78712, USA., Department of Physics, The University of Texas at Austin, Department of Physics, The University of Texas at Austin, USA

  • Shangjr Gwo

    Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan, National Tsing-Hua University

  • Chih-Kang Shih

    Department of Physics, The University of Texas at Austin, Austin, Texas, 78712, USA., University of Texas at Austin, Physics, University of Texas at Austin, Department of Physics, University of Texas at Austin, TX 78712, United States, Department of Physics, The University of Texas at Austin, Department of Physics, The University of Texas at Austin, USA