Multimode One-Way Waveguides of Large Chern Numbers
Top Cited Papers
Open Access
- 12 September 2014
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 113 (11), 113904
- https://doi.org/10.1103/physrevlett.113.113904
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.Keywords
Funding Information
- Massachusetts Institute of Technology (MIT)
- National Science Foundation (NSF) (DMR-0819762)
- U.S. Department of Energy (DOE) (DE-SC0001299)
- Army Research Office (ARO) (W911NF-13-D-0001)
This publication has 30 references indexed in Scilit:
- Large-Chern-Number Quantum Anomalous Hall Effect in Thin-Film Topological Crystalline InsulatorsPhysical Review Letters, 2014
- Quantum Anomalous Hall Effect with Higher PlateausPhysical Review Letters, 2013
- Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological InsulatorScience, 2013
- Photonic topological insulatorsNature Materials, 2012
- Realizing effective magnetic field for photons by controlling the phase of dynamic modulationNature Photonics, 2012
- Topological States and Adiabatic Pumping in QuasicrystalsPhysical Review Letters, 2012
- Robust optical delay lines with topological protectionNature Physics, 2011
- Observation of unidirectional backscattering-immune topological electromagnetic statesNature, 2009
- Possible Realization of Directional Optical Waveguides in Photonic Crystals with Broken Time-Reversal SymmetryPhysical Review Letters, 2008
- Model for a Quantum Hall Effect without Landau Levels: Condensed-Matter Realization of the "Parity Anomaly"Physical Review Letters, 1988