Weyl points and line nodes in gyroid photonic crystals
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Fu_Weyl points.pdf
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1.22 MB
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Author(s)
Lu, Ling
Fu, Liang
Soljacic, Marin
Joannopoulos, John
Date Issued
March 2013
Journal
Nature Photonics
Publisher
Nature Publishing Group
Citation
Lu, Ling, Liang Fu, John D. Joannopoulos, and Marin Soljačić. "Weyl points and line nodes in gyroid photonic crystals." Nature Photonics 7 (2013), p.294-299.
Version
Original manuscript
Abstract
Weyl points and line nodes are three-dimensional linear point and line degeneracies between two bands. In contrast to two-dimensional Dirac points, which are their lower-dimensional analogues, Weyl points are stable in momentum space, and the associated surface states are predicted to be topologically non-trivial. However, Weyl points are yet to be discovered in nature. Here, we report photonic crystals based on double-gyroid structures, exhibiting frequency-isolated Weyl points with complete phase diagrams by breaking the parity and time-reversal symmetries. Gapless surface dispersions associated with non-zero Chern numbers are demonstrated. Line nodes are also found in similar geometries, the associated surface states forming flat dispersion bands. Our results are based on realistic ab initio calculations with true predictive power and should be readily realizable experimentally from microwave to optical frequencies.
MIT Department
Massachusetts Institute of Technology. Materials Processing Center
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/nphoton.2013.42
