Effects of dielectric substrate properties for optical phenomena in a nanoscale ridge aperture

Taeseob Kim, Won Sup Lee, Sung Mook Kang, No Cheol Park, Kyoung Su Park, Young Pil Park

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4 Citations (Scopus)

Abstract

In this paper, we show that the increase in power throughput is dependent on the thickness and the relative permittivity of the dielectric substrate in the aperture-on-dielectric-substrate configuration. We also show that, similar to a metal nanoparticle, an increase in the medium dielectric constant results in a red-shift in the plasmon resonance of a nanoscale ridge aperture. These results, which are verified by a numerical analysis, provide a new understanding of the phenomenon of surface-plasmon-enhanced transmission. We demonstrate that the red-shifted wavelength and dielectric properties can compensate for the optical loss due to plasmon red-shift. In addition, the dielectric substrate layer behaves like a FabryPérot optical resonator, resulting in coherent constructive interference. The simulation results show that the |E| 2 intensity of the triangular aperture is 200% greater when this dielectric effect and red-shift resonance are considered.

Original languageEnglish
Article number045001
JournalJournal of Optics
Volume14
Issue number4
DOIs
Publication statusPublished - 2012 Apr 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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