Creating large bandwidth line defects by embedding dielectric waveguides into photonic crystal slabs
- 18 November 2002
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 81 (21) , 3915-3917
- https://doi.org/10.1063/1.1523637
Abstract
We introduce a general designing procedure that allows us, for any given photonic crystal slab, to create an appropriate line defect structure that possesses single-mode bands with large bandwidth and low dispersion within the photonic band-gap region below the light line. This procedure involves designing a high index dielectric waveguide that is phase matched with the gap of the photonic crystal slab, and embedding the dielectric waveguide as a line defect into a crystal in a specific configuration that is free of edge states within the guiding bandwidth. As an example, we show a single mode line defect waveguide with a bandwidth approaching 13% of the center-band frequency, and with a linear dispersion relation throughout most of the bandwidth.Keywords
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