Optical tunneling effect of surface plasmon polaritons and localized surface plasmon resonance

Wei Chih Liu, Din Ping Tsai

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Abstract

Surface plasmon resonance of periodic narrow-grooved metallic thin films were studied with finite-difference time-domain simulations. Two distinguishable modes, surface plasmon polaritons and localized surface plasmons, are associated with different periods. The surface plasmon polaritons have widely extended near-field distributions and sharp resonance; however, the localized surface plasmon modes are highly concentrated in the grooves, and have broad resonance. Our results demonstrate that the surface plasmon polaritons and localized surface plasmons were coupled with electromagnetic waves to resonantly tunnel through the array of subwavelength holes. This optical tunneling effect exhibited large phase lag and time delay for the surface plasmon polariton. The broadness of localized surface plasmon resonance indicated that it could exist in randomly distributed, narrow-grooved structures as well.

Original languageEnglish
Article number155423
Pages (from-to)1554231-1554236
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number15
Publication statusPublished - 2002 Apr 15
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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