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

作者：Saito Hikaru^*; Yamamoto Naoki

来源：Optics Express, 2015, 23(3): 2524-2540.

DOI：10.1364/OE.23.002524

The optical properties of surface plasmon polaritons (SPPs) are investigated at the. 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. 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.

• 出版日期2015-2-9