研究目的
To analyze the plasmon dispersions of graphene multilayer structure where the relativistic electrons in different spatially separated layers are coupled via Coulomb interactions.
研究成果
The study found that the plasmon modes split in energy due to the interlayer coupling, and at long wave limit, the splitting increases with the number of layers, with the frequency proportional to the square root of N times the plasmon frequency of single layer graphene. A surface plasmon mode was found to rise outside the plasmon band after a certain number of layers at a fine value of the wavevector, localized at the interface with amplitude decaying exponentially away from the interfaces.
研究不足
The study is limited to the linear optical properties of graphene and isotropic dielectric constants. The exploration does not cover nonlinear optical properties or anisotropic dielectric constants.