2016/05/19 by Godfrey Gumbs, Gumbs, Godfrey, Dipendra Dahal +3
Engineering · Materials Science · #FOS: Physical sciences #Graphene research and applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Plasmonic and Surface Plasmon Research #Thermal Radiation and Cooling Technologies
paper · pdf · doi:10.48550/arxiv.1605.06070
openalex publication_date 2016/05/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We perform a comprehensive analysis of the spectrum of graphene plasmons\nwhich arise when a pair of sheets are confined between conducting materials.\nThe associated enhanced local fields may be employed in the manipulation of\nlight on the nanoscale by adjusting the separation between the graphene layers,\nthe energy band gap as well as the concentration of charge carriers in the\nconducting media surrounding the two-dimensional (2D) layers. We present a\ntheoretical formalism, based on the calculation of the surface response\nfunction, for determining the plasmon spectrum of an encapsulated pair of 2D\nlayers and apply it to graphene. We solve the coupled equations involving the\ncontinuity of the electric potential and discontinuity of the electric field at\nthe interfaces separating the constituents of the hybrid structure. We have\ncompared the plasmon modes for encapsulated gapped and gapless graphene. The\nassociated nonlocal graphene plasmon spectrum coupled to the "sandwich" system\nshow a linear acoustic plasmon mode as well as a low-frequency mode\ncorresponding to in-phase oscillations of the adjacent 2D charge densities.\nThese calculations are relevant to the study of energy transfer via plasmon\nexcitations when graphene is confined by a pair of thick conducting materials.\n