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

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

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 i...

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Bibliographic Details
Main Authors: Zhou, Xin, Leykam, Daniel, Chattopadhyay, Udvas, Khanikaev, A. B., Chong, Yi Dong
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
Subjects:
Magneto-optical
Dirac Point
DRNTU::Science::Physics
Online Access:https://hdl.handle.net/10356/90178
http://hdl.handle.net/10220/47197
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Institution: Nanyang Technological University
Language: English
Description
Summary: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.

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