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Topological polaritons from photonic Dirac cones coupled to excitons in a magnetic field

Yi, Kexin and Karzig, Torsten (2016) Topological polaritons from photonic Dirac cones coupled to excitons in a magnetic field. Physical Review B, 93 (10). Art. No. 104303. ISSN 1098-0121. doi:10.1103/PhysRevB.93.104303.

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We introduce an alternative scheme for creating topological polaritons (topolaritons) by exploiting the presence of photonic Dirac cones in photonic crystals with triangular lattice symmetry. As recently proposed, topolariton states can emerge from a coupling between photons and excitons combined with a periodic exciton potential and a magnetic field to open up a topological gap. We show that in photonic crystals the opening of the gap can be substantially simplified close to photonic Dirac points. Coupling to Zeeman-split excitons breaks time reversal symmetry and allows to gap out the Dirac cones in a nontrival way, leading to a topological gap similar to the strength of the periodic exciton potential. Compared to the original topolariton proposal [T. Karzig et al., Phys. Rev. X 5, 031001 (2015)], this scheme significantly increases the size of the topological gap over a wide range of parameters. Moreover, the gap opening mechanism highlights an interesting connection between topolaritons and the scheme of [F. D. M. Haldane and S. Raghu, Phys. Rev. Lett. 100, 013904 (2008)] to create topological photons in magneto-optically active materials.

Item Type:Article
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URLURL TypeDescription Paper
Karzig, Torsten0000-0003-0834-0547
Additional Information:© 2016 American Physical Society. Received 12 November 2015; revised manuscript received 9 February 2016; published 16 March 2016. We thank Gil Refael and Charles-Edouard Bardyn for valuable discussions. This work was funded by the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support from the Gordon and Betty Moore Foundation through Grant No. GBMF1250 and the NSF through Grant No. DMR-1410435.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationGBMF1250
Issue or Number:10
Record Number:CaltechAUTHORS:20160105-102953553
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Official Citation:Topological polaritons from photonic Dirac cones coupled to excitons in a magnetic field Kexin Yi and Torsten Karzig Phys. Rev. B 93, 104303 – Published 16 March 2016
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63375
Deposited By: Ruth Sustaita
Deposited On:05 Jan 2016 20:16
Last Modified:10 Nov 2021 23:15

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