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A tri-layer metamaterial perfect absorber of light, consisting of (Al/ZnS/Al)films with the top aluminium layer patterned as an array of circular disknanoantennas, is investigated for resonantly enhancing Raman scattering fromC-60 fullerene molecules deposited on the metamaterial. The metamaterial isdesigned to have resonant bands due to plasmonic and electromagnetic resonancesat the Raman pump frequency (725 nm) as well as Stokes emission bands. TheRaman scattering from C60 on the metamaterial with resonantly matched bands ismeasured to be enhanced by an order of magnitude more than from C60 onmetamaterials with off-resonant absorption bands peaked at 1090 nm. The Ramanpump is significantly enhanced due to the resonance with a propagating surfaceplasmon band, while the highly impedance matched electromagnetic resonance isexpected to couple out the Raman emission efficiently. The nature andhybridization of the plasmonic and electromagnetic resonances to form compoundresonances are investigated by numerical simulations.

Resonant enhancement of Raman scattering in metamaterials with hybrid electromagnetic and plasmonic resonances