Fig. 4. (a) Optical absorption spectra for the biaxially corrugated graphene structure on closely packed SiO2 nanospheres with varying Ds from 10 to 150 nm. (b) Scaling of the fundamental-mode resonant wavelength with respect to Ds. (c) Near-field distributions normalized by the incident field (E0) in the biaxially corrugated graphene structures at the resonance wavelength of the fundamental plasmonic mode λres for different Ds ranging from 10 to 150 nm.
