Topological magnetoplasmon

• Main Authors: Wang, Zhong (Author), Jin, Dafei (Contributor), Fang, Xuanlai (Contributor), Lu, Ling (Contributor), Fang, Chen (Contributor), Joannopoulos, John (Contributor), Soljacic, Marin (Contributor), Fu, Liang (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Mechanical Engineering (Contributor), Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: Nature Publishing Group, 2017-05-05T14:59:04Z.
• Subjects: Article
• Online Access: Get fulltext

 Classical wave fields are real-valued, ensuring the wave states at opposite frequencies and momenta to be inherently identical. Such a particle-hole symmetry can open up new possibilities for topological phenomena in classical systems. Here we show that the historically studied two-dimensional (2D) magnetoplasmon, which bears gapped bulk states and gapless one-way edge states near-zero frequency, is topologically analogous to the 2D topological p+ip superconductor with chiral Majorana edge states and zero modes. We further predict a new type of one-way edge magnetoplasmon at the interface of opposite magnetic domains, and demonstrate the existence of zero-frequency modes bounded at the peripheries of a hollow disk. These findings can be readily verified in experiment, and can greatly enrich the topological phases in bosonic and classical systems.