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A mixed finite-element method with an impedance transmission boundary condition (ITBC) is proposed to solve the graphene plasmonic modes. The new variational formulation combines the Gauss’ law with the transverse components of vectorial Helmholtz equation and models the field penetration through a thin graphene sheet by ITBC. The second-order edge-based vector LT/QN basis functions are applied to...
Graphene is a real 2D material with one atomic thickness. It has drawn increasing interests in many research subjects. Active plasmonics in graphene is an emerging field that allows manipulation and external control of light confined in a graphene-based structure. Broad tunability, fast modulation speed, extremely high field confinement, and low optical loss are advantages when comparing to traditional...
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