Strong influence of surface structures on enhanced transmission through subwavelength hole arrays

Kunihiko Ishihara, Keishi Ohashi

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Abstract

We analyzed the influence of the surface structure on enhanced transmission through subwavelength hole arrays. The hole arrays show extremely large enhanced transmission, but the transmission rapidly decreases as the hole diameter decreases. To clarify the cause of the transmission decrease, we calculated the dimple arrays and found that the diameter of the dimple strongly influences the efficiency of surface plasmon polaritons (SPPs) excitation. We show that the addition of the optimized surface structure to conventional hole arrays for the efficient SPP excitation leads to strongly enhanced transmission in much smaller diameter holes than the incident light wavelength.

Original languageEnglish
Pages (from-to)L973-L975
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume44
Issue number28-32
DOIs
Publication statusPublished - 2005 Dec 1

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Keywords

  • Enhanced transmission
  • FDTD
  • Finite-difference time-domain method
  • Hole arrays
  • Periodic structure
  • Subwavelength hole
  • Surface plasmon polariton

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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