Infrared Topological Plasmons in Graphene
Name
PhysRevLett.118.245301.pdf
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2.02 MB
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Author(s)
Jin, Dafei
Christensen, Thomas
Soljacic, Marin
Fang, Xuanlai
Lu, Ling
Zhang, Xiang
Date Issued
June 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Jin, Dafei, Thomas Christensen, Marin Soljačić, Nicholas X. Fang, Ling Lu, and Xiang Zhang. “Infrared Topological Plasmons in Graphene.” Physical Review Letters 118, no. 24 (June 16, 2017).
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Materials Processing Center
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.118.245301
