Abstract

Manipulating light with subwavelength confinement is a critical challenge for nanoscale optical applications. One of the most promising solutions is nanophotonics based on surface plasmon-polartons (SPPs). Metal surfaces with periodic structures called plasmonic crystals (PlCs) enable us to engineer the band structure of SPP, leading to the control of emission and waveguide. Especially, the properties of the band gaps and the band edge states are important for the plasmonic devices, such as chemical sensors, solar cells and lasers. We report systematic experimental studies of the band gaps and the band edge states in two-dimensional (2D) PlCs with hexagonal lattice by using cathodoluminescence (CL) [1].

© 2014 Japan Society of Applied Physics, Optical Society of America