Size dependence of bandgaps in a two-dimensional plasmonic crystal with a hexagonal lattice

Hikaru Saito, Naoki Yamamoto

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The optical properties of surface plasmon polaritons (SPPs) are investigated at the Γ point in a two-dimensional plasmonic crystal with a hexagonal lattice (Hex-PlC). The cathodoluminescence (CL) technique combined with a scanning transmission electron microscope (STEM) are used to produce spectral images of the SPP standing waves at the Γ point and identify the four types of band-edge modes predicted by group theory. The systematic measurement of the band-edge energies employed here is used to determine the characteristic dependence of each band-edge mode on the structure parameters, which provides some criteria for the design of plasmonic devices with Hex-PlCs.

Original languageEnglish
Pages (from-to)2524-2540
Number of pages17
JournalOptics Express
Volume23
Issue number3
DOIs
Publication statusPublished - Feb 9 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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