2017/02/08 by Dafei Jin, Thomas Christensen, Marin Soljačić +4 · 189 citations
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Graphene #Graphene research and applications #Infrared #Materials science #Metamaterials and Metasurfaces Applications #Optics #Physics #Plasmon #Plasmonic and Surface Plasmon Research #Quantum mechanics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.118.245301
published in Physical Review Letters 118(24), 245301 (American Physical Society) · 5 pages, 4 figures
arxiv created 2017/02/08 · openalex publication_date 2017/06/16 · arxiv updated 2017/06/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We propose a two-dimensional plasmonic platform-periodically patterned monolayer graphene-which hosts topological one-way edge states operable up to infrared frequencies. We classify the band topology of this plasmonic system under time-reversal-symmetry breaking induced by a static magnetic field. At finite doping, the system supports topologically nontrivial band gaps with mid-gap frequencies up to tens of terahertz. By the bulk-edge correspondence, these band gaps host topologically protected one-way edge plasmons, which are immune to backscattering from structural defects and subject only to intrinsic material and radiation loss. Our findings reveal a promising approach to engineer topologically robust chiral plasmonic devices and demonstrate a realistic example of high-frequency topological edge states.