97 citations · 644 across the 52 of their papers we have counts for
7 papers · 1 filter
Non-local Plasma Spectrum of Graphene Interacting with a Thick Conductor
Godfrey Gumbs, Andrii Iurov, N. J. M. Horing
Self-consistent field theory is used to obtain the non-local plasmon dispersion relation of monolayer graphene which is Coulomb-coupled to a thick conductor. We calculate numerical…
Surface Plasmon Instability Leading to Emission of Radiation
Godfrey Gumbs, Andrii Iurov, Danhong Huang +1
We propose a new energy conversion approach from a dc electric field to a terahertz wave based on hybrid semiconductors by combining two-dimensional (2D) crystalline layers and a t…
Engineering semiconductor hybrids for sensing
Godfrey Gumbs, Andrii Iurov, Danhong Huang
The effect of screening of the coulomb interaction between two layers of two-dimensional electrons, such as in graphene, by a highly doped semiconducting substrate is investigated.…
Role Played by Surface Plasmons on Plasma Instability in Composite Layered Structures
Godfrey Gumbs, Andrii Iurov, Danhong Huang
We demonstrate the engineering of a source of radiation from growing surface plasmons (charge density oscillations) in a composite nano-system. The considered hybrid nano-structure…
Novel properties of graphene in the presence of energy gap: optics, transport and mobility studies
Godfrey Gumbs, Danhong Huang, Andrii Iurov +1
We review the transmission of Dirac electrons through a potential barrier in the presence of circularly polarized light. A different type of transmission is demonstrated and explai…
Revealing Hofstadter Spectrum for Graphene in a Periodic Potential
Godfrey Gumbs, Andrii Iurov, Danhong Huang +1
We calculate the energy bands for graphene monolayers when electrons move through a periodic electrostatic potential in the presence of a uniform perpendicular magnetic field. We c…
Modeling Anisotropic Plasmon Excitations in Self-Assembled Fullerenes
Andrii Iurov, Godfrey Gumbs, Bo Gao +1
The plasmon excitations in Coulomb-coupled spherical two-dimensional electron gases (S2DEGs) reveal an interesting dependence on the displacement vector between the centers of the…