期刊
OPTICS LETTERS
卷 37, 期 19, 页码 4110-4112出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.37.004110
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资金
- National Natural Science Foundation of China [60971062, 61178062]
We demonstrate that one-way electromagnetic modes could be sustained by the edge of a gyromagnetic photonic crystal slab of triangular lattice under an external dc magnetic field. The applied magnetic field breaks the time-reversal symmetry of the three-dimensional system, and thus the original degeneracy point in k space, at which two dispersion surfaces intersect, is lifted, resulting in a photonic band gap below the light cone. At this band gap, the one-way mode is localized horizontally to the slab edge, while confined by the index contrast in the vertical direction. (C) 2012 Optical Society of America
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