Fig. 2. Optical absorption spectra of (a) a free-standing biaxially deformed graphene structure with λw = 150 nm, where λw is the corrugated wavelength, for Einc‖λw (blue) and Einc⊥λw (red). The inset shows a schematic illustration of the biaxially deformed graphene structure. Absorption (b) and transmission (c) spectra of a biaxially deformed graphene structure on close-packed SiO2 nanosphere arrays with Ds = 150 nm. The insets show the schematic illustration for the biaxially deformed graphene structure on closely packed SiO2 nanospheres. (d) Near-field intensity distributions of the first and second graphene plasmon modes at resonance wavelengths of 7.25 and 4.9 µm, respectively.
