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20 September 2011 Analyzing symmetry in photonic band structure of gyro-magnetic photonic crystals
Ali Najafi, Sina Khorasani, Faezeh Gholami
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In the band structure analysis of photonic crystals it is normally assumed that the full photonic gaps could be found by scanning high-symmetry paths along the edges of Irreducible Brillouin Zones (IBZ). We have recently shown [1] that this assumption is wrong in general for sufficiently symmetry breaking geometries, so that the IBZ is exactly half of the complete BZ. That minimal required symmetry arises from the requirement on time-reversal symmetry. In this paper we show that even that requirement might be broken by using gyro-magnetic materials in the composition of photonic structures we can observe that the IBZ extends fully to the boundaries of the complete BZ, that is IBZ must be as the same as BZ.
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Ali Najafi, Sina Khorasani, and Faezeh Gholami "Analyzing symmetry in photonic band structure of gyro-magnetic photonic crystals", Proc. SPIE 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX, 80963R (20 September 2011);

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