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Realization of a magneto-optical near-zero index medium by an unpaired Dirac point

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Title
Realization of a magneto-optical near-zero index medium by an unpaired Dirac point
Author(s)
Xin Zhou; Daniel Leykam; Udvas Chattopadhyay; A. B. Khanikaev; Y. D. Chong
Publication Date
2018-11
Journal
PHYSICAL REVIEW B, v.98, no.20, pp.205115
Publisher
AMER PHYSICAL SOC
Abstract
We realize an unpaired Dirac cone at the center of the Brillouin zone, using a gyromagnetic photonic crystal with broken square sublattice symmetry and broken time-reversal symmetry. The behavior of the Dirac modes can be described by a gyromagnetic effective medium model with near-zero refractive index, and Voigt parameter near unity. When two domains are subjected to opposite magnetic biases, there exist unidirectional edge states along the domain wall. This establishes a link between topological edge states and the surface waves of homogeneous magneto-optical media.
URI
https://pr.ibs.re.kr/handle/8788114/5085
DOI
10.1103/PhysRevB.98.205115
ISSN
2469-9950
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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