Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.113904
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Funding
- MIT Tom Frank Fellowship
- MRSEC Program of the NSF [DMR-0819762]
- MIT S3TEC EFRC of the U.S. DOE [DE-SC0001299]
- U.S. Army Research Office [W911NF-13-D-0001]
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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.
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