Asymmetric Propagation of Optical Signals in Graded Plasmonic Chains

Ming Jie Zheng, Dangyuan Lei, Kousuke Yakubo, Kin Wah Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)


The propagation of optical signals has been studied theoretically and computationally in fully retarded graded plasmonic chains. Asymmetric optical response due to retardation has been observed in various plasmonic chains with gradients in host permittivities, particle sizes, and/or interparticle distances. The range of wavelength-dependent optical response is broadened by the graded effects of host permittivity. Asymmetric propagation ratio is found in the presence of any kind of gradients, and the physical mechanism is analyzed through the gradon modes. These results have potential applications in designing nanostructured plasmonic devices.
Original languageEnglish
Pages (from-to)19-27
Number of pages9
Issue number1
Publication statusPublished - 1 Mar 2011
Externally publishedYes


  • Asymmetric optical response
  • Asymmetric propagation ratio
  • Graded plasmonic chains

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biochemistry


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