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13 April 2005 Enhanced confinement due to ultra-flat bands in photonic crystal waveguides
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Abstract
We present examples of two-dimensional photonic crystal band structures which defy the conventional wisdom that a photonic crystal provides optimal confinement for frequencies at the middle of the photonic band gap. This is due to the presence of an ultra-flat photonic band that leads to enhanced confinement in an adjacent band gap at frequencies near the band gap edge and far from midgap.
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Mihai Ibanescu, Evan J. Reed, and John D. Joannopoulos "Enhanced confinement due to ultra-flat bands in photonic crystal waveguides", Proc. SPIE 5733, Photonic Crystal Materials and Devices III, (13 April 2005); https://doi.org/10.1117/12.591372
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