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Flat Band Slow Light in Symmetric Line Defect Photonic Crystal Waveguides

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5 Author(s)
Jin Hou ; F212 Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China ; Dingshan Gao ; Huaming Wu ; Ran Hao
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Flat band slow light in symmetric line defect photonic crystal waveguides formed by adding dielectric pillars in the air holes nearest to the waveguide core is investigated. By adjusting the radii of the new dielectric pillars, a linear band in the photonic band structure appears which denotes low group velocity dispersion. High average group index of 74.4 with 2.3-nm bandwidth is demonstrated in an optimized waveguide by finite-difference time-domain simulation.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 20 )