Controlling terahertz surface plasmon polaritons in Dirac semimetal sheets

Infrared Surface Plasmon Polaritons on Semiconductor, Semimetal and Conducting Polymer

Terahertz wedge plasmon polaritons.

We propose a metamaterial approach to route terahertz waves that features subwavelength confinement in the transverse plane. The guiding mechanism is based on geometrically induced electromagnetic modes sustained by corrugated metallic wedges, whose characteristics resemble those of wedge plasmon polaritons at telecom and optical frequencies. Additionally, frequency selective focusing and slowi...

Terahertz surface plasmon polaritons on periodically corrugated metal surfaces.

Based on a modal expansion of electromagnetic fields, a rigorous method for analyzing surface plasmon polaritons (SPPs) on a periodically corrugated metal surface has been formulated in this paper. This method takes into account the finite conductivity of the metal as well as higher-order modes within the grooves of the surface structure, thus is able to accurately calculate the loss of these s...

Terahertz instability of surface optical-phonon polaritons that interact with surface plasmon polaritons in the presence of electron drift

with surface plasmon polaritons in the presence of electron drift O. Sydoruk, E. Shamonina, V. Kalinin, and L. Solymar Department of Electrical and Electronic Engineering, Optical and Semiconductor Devices Group, Imperial College, Exhibition Road, London SW7 2BT, United Kingdom Erlangen Graduate School in Advanced Optical Technologies, University of Erlangen-Nuremberg, Paul-Gordan Str. 6, D-910...

Terahertz-induced acceleration of massive Dirac electrons in semimetal bismuth

Dirac-like electrons in solid state have been of great interest since they exhibit many peculiar physical behaviors analogous to relativistic mechanics. Among them, carriers in graphene and surface states of topological insulators are known to behave as massless Dirac fermions with a conical band structure in the two-dimensional momentum space, whereas electrons in semimetal bismuth (Bi) are ex...