Objective:
Compare the UV plasmonic response of Al and Mg nanostructures. Light
transmission through sub-wavelength aperture arrays shows significant
differences between the two metals that cannot be explained using simple
simulations.
Approach: Detailed
S/TEM cross-section analysis of samples was performed to determine
nanostructure geometry and elemental composition. Because of significant
alloying at the interfaces and Ga implantation near the surfaces
from FIB milling, simulation models were updated with
geometric and composition information.
Results
and
Significance:
Updated simulation models accurately predict light transmission through
aperture arrays of both materials. This methodology provides a path for
predicting near-field and far-field optical properties of complex plasmonic
nanostructures.
