Integral Equation Analysis of Plane Wave Scattering by Coplanar Graphene-Strip Gratings in the THz Range

Scattering and absorption performance of a microsize graphene-based parabolic reflector in the THz range illuminated by a complex line source

“…The forward directivity is getting higher with the higher chemical potential values. As mentioned above, if the frequency is getting higher then a graphene reflector becomes more and more transparent because its surface impedance Z increases almost linearly, with the dominant imaginary part, and finally it exceeds the free-space impedance value (see [3,[14][15][16]). Therefore, the linear increase in the forward directivity is restricted to lower THz range and is replaced with reduction if the frequency gets above 2 THz for realistic values of the chemical potential.…”

“…The role of the SP resonances is also a matter of study. Here, we can keep in mind the scattering and absorption of THz waves by flat graphene strips and finite graphene-strip gratings has already shown the presence of SP resonances, especially strong in the lower part of THz range [14][15][16][17][18][19].…”

Directive Surface Plasmons on Tunable Two-Dimensional Hyperbolic Metasurfaces and Black Phosphorus: Green’s Function and Complex Plane Analysis

“…12-a. This densely packed strip surface can act as a physical implementation of a metasurface at terahertz and near infrared frequencies [3], [46]. The dispersion topology of the proposed structure may range from elliptical to hyperbolic as a function of its geometrical and electrical parameters.…”

Focusing of THz waves with a microsize parabolic reflector made of graphene in the free space

“…Note that the scattering and absorption of THz waves by a single flat graphene strip and finite graphene-strip gratings was reduced to SIE and its Nystrom type solution was built in [13,14]. Infinite graphene-strip grating in the free space was also studied by the MAR-RHP technique in [10].…”