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Experimental Observation of Large Chern Numbers in Photonic Crystals

Author(s)
Skirlo, Scott A.; Lu, Ling; Igarashi, Yuichi; Yan, Qinghui; Soljacic, Marin; Joannopoulos, John; ... Show more Show less
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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.
Date issued
2015-12
URI
http://hdl.handle.net/1721.1/100284
Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies; Massachusetts Institute of Technology. Department of Physics
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
ISSN
0031-9007
1079-7114

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