Experimental Observation of Large Chern Numbers in Photonic Crystals
Name
PhysRevLett.115.253901.pdf
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3.06 MB
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Author(s)
Skirlo, Scott A.
Lu, Ling
Igarashi, Yuichi
Yan, Qinghui
Soljacic, Marin
Joannopoulos, John
Date Issued
December 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Skirlo, Scott A., Ling Lu, Yuichi Igarashi, Qinghui Yan, John Joannopoulos, and Marin Sojacic. "Experimental Observation of Large Chern Numbers in Photonic Crystals." Phys. Rev. Lett. 115, 253901 (December 2015). © 2015 American Physical Society
Version
Final published version
Abstract
Despite great interest in the quantum anomalous Hall phase and its analogs, all experimental studies in electronic and bosonic systems have been limited to a Chern number of one. Here, we perform microwave transmission measurements in the bulk and at the edge of ferrimagnetic photonic crystals. Band gaps with large Chern numbers of 2, 3, and 4 are present in the experimental results, which show excellent agreement with theory. We measure the mode profiles and Fourier transform them to produce dispersion relations of the edge modes, whose number and direction match our Chern number calculations.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.115.253901
