Figure 3
From: Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence
Comparison of the measured and calculated CL spectra, and the normalized CL map. (a) Measured (black) and calculated (red) CL spectra for r = 80 nm nanoring excited by 15 keV electrons at the position of r = 120 nm. (b) The CL intensity as a function of excitation position for the same nanoring at λ = 604 nm, integrated over a 20 nm bandwidth. The black dashed circle indicates the edge of the nanoring.
