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Strong localization of surface plasmon polaritons with engineered disorder.

Authors
  • Shi, Wen-Bo
  • Liu, Lian-Zi
  • Peng, Ruwen
  • Xu, Di-Hu
  • Zhang, Kun
  • Jing, Hao
  • Fan, Ren-Hao
  • Huang, Xian-Rong
  • Wang, Qian-Jin
  • Wang, Mu
Type
Published Article
Journal
Nano Letters
Publisher
American Chemical Society
Publication Date
Feb 12, 2018
Identifiers
DOI: 10.1021/acs.nanolett.7b05191
PMID: 29432022
Source
Medline
License
Unknown

Abstract

In this work, we experimentally demonstrate for the first time strong localization of surface plasmon polaritons (SPPs) at visible regime in metallic nanogratings with short-range correlated disorder. By increasing the degree of disorder, the confinement of SPPs is significantly enhanced, and the effective SPP propagation length dramatically shrinks. Strong localization of SPPs eventually emerges at visible regime, which is verified by the exponentially-decayed fields and the vanishing auto-correlation function of the SPPs. Physically the short-range correlated disorder induces strong interference among multiple scattered SPPs and provides adequate fluctuation to effective permittivity, which leads to the localization effect. Our study demonstrates a unique opportunity for disorder engineering to manipulate light on nanoscale, and may achieve various applications in random nanolasing, solar energy, and strong light-matter interactions.

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