IEEE Photonics Journal (Jan 2018)

Unidirectional Optical Transmission in a Single-Layer Metallic Grating Consisting of Cambered Resonators

  • Pengwei Xu,
  • Mingsi Zhang,
  • Zongqiang Chen,
  • Jiwei Qi,
  • Jing Chen,
  • Jun Qian,
  • Yudong Li,
  • Qian Sun,
  • Jingjun Xu

DOI
https://doi.org/10.1109/JPHOT.2018.2850321
Journal volume & issue
Vol. 10, no. 4
pp. 1 – 8

Abstract

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In order to realize unidirectional optical transmission (UOT), a single-layer metallic grating (SMG) consisting of cambered resonators (CRs) is proposed. Numerical simulation results show that the transmittance contrast ratio of the SMG can reach about 5000 with a high unidirectional transmittance of 39%. UOT results from diffraction enhancement or suppression in transmission direction. Diffraction is manipulated by the interference of electromagnetic radiation from local surface plasmons on CRs. Our single-layer structure has sub-100 nm thickness and can be used in ultracompact optical devices to manipulate light transmission.

Keywords