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Multimode One-Way Waveguides of Large Chern Numbers

Author(s)
Skirlo, Scott A.; Lu, Ling; Soljacic, Marin
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Abstract
Current experimental realizations of the quantum anomalous Hall phase in both electronic and photonic systems have been limited to a Chern number of one. In photonics, this corresponds to a single-mode one-way edge waveguide. Here, we predict quantum anomalous Hall phases in photonic crystals with large Chern numbers of 2, 3, and 4. These new topological phases were found by simultaneously gapping multiple Dirac and quadratic points. We demonstrate a continuously tunable power splitter as a possible application of multimode one-way waveguides. All our findings are readily realizable at microwave frequencies.
Date issued
2014-09
URI
http://hdl.handle.net/1721.1/89534
Department
Massachusetts Institute of Technology. Materials Processing Center; Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Skirlo, Scott A., Ling Lu, and Marin Soljacic. “Multimode One-Way Waveguides of Large Chern Numbers.” Physical Review Letters 113, no. 11 (September 2014). © 2014 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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