Nonlinear Chiral Plasmonics in Two-dimensional Dirac Materials*

The realm of plasmonic devices based on two-dimensional and layered materials promises us a way to bridge electronics and photonics, closing the THz gap. While giving rise to a wide range of new designs for nanodevices. Here we study the occurrence and behaviour of nonlinear plasma waves – viz. solitary and localized chiral waves in two-dimensional materials and discuss the foreseeable applications. In particular, we consider a graphene structure as a unidirectional waveguide; where solitary waves arise from the interplay of Coulomb long-range interaction and quantum Bohm potential in the bulk. Secondly, we study localized plasmonic modes propagating along a magnetic domain wall, showing that such modes are topologically protected chiral waves.