Surface plasmon enhanced absorption and suppressed transmission in periodic arrays of graphene ribbons

Details Surface plasmon enhanced absorption and suppressed transmission in periodic arrays of graphene ribbons Surface plasmon enhanced absorption and suppressed transmission in periodic arrays of graphene ribbons

2011-12-30

arxiv.org/abs/1201.0191v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

Resonance diffraction in the periodic array of graphene micro-ribbons is theoretically studied following a recent experiment [L. Ju et al, Nature Nanotech. 6, 630 (2011)]. Systematic studies over a wide range of parameters are presented. It is shown that a much richer resonant picture would be observable for higher relaxation times of charge carriers: more resonances appear and transmission can be totally suppressed. The comparison with the absorption cross-section of a single ribbon shows that the resonant features of the periodic array are associated with leaky plasmonic modes. The longest-wavelength resonance provides the highest visibility of the transmission dip and has the strongest spectral shift and broadening with respect to the single-ribbon resonance, due to collective effects.

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