Tunable and absolute electromagnetic vacuum in two-dimensional photonic-band-gap Based on multiferroic materials
Date
2011-09-28
Authors
Chen, Kai
Jia, Wei
Chen, Yanbin
Lu, Minghui
Zhang, Xirui
Yang, Wei
Wu, Yong
Huang, Chenxi
Li, Xiangyin
Su, Jie
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American Institute of Physics (AIP)
Abstract
When multiferroic terbium manganite (TbMnO₃) crystal cylinders are periodically arranged in a square lattice, the resulting two-dimensional (2D) system exhibits photonic band gaps (PBGs). The absolute PBG originating from the Mie resonance is modulated from closed to open by applying an external static magnetic field, which is attributed to the electromagnon depression of the dielectric constant by the rearrangement of antiferromagnetic order. Tunable electromagnetic band structure may be realized by controlling the magnetic transition of manganese spins in TbMnO₃.
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Keywords: Antiferromagnetic orders; Electromagnetic vacuum; External static magnetic; Magnetic transitions; Mie resonance; Multiferroic materials; Multiferroics; Square lattices; Two-dimensional (2D) systems; Antiferromagnetism; Dielectric materials; Electromagneti
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Applied Physics Letters
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Journal article
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