Slow-light dispersion in coupled periodic waveguides

Andrey A. Sukhorukov, Andrei V. Lavrinenko, Dmitry N. Chigrin, Dmitry E. Pelinovsky, Yuri S. Kivshar
2008 Journal of the Optical Society of America. B, Optical physics  
Periodic waveguides bring a new twist onto the typical waveguiding problems been intermediate case between photonic crystal waveguides and photonic wires or ridge waveguides. We develop an asymptotic theory applicable for a broad class of coupled periodic waveguide structures, and use the analytical expressions to identify the generic types of dispersion in the vicinity of a photonic band-edge, where the group velocity of light is reduced. We show that the dispersion can be controlled by the
more » ... ontrolled by the longitudinal shift between the waveguides. We also demonstrate through finite-difference time-domain simulations examples of spatial and temporal pulse dynamics in association with different types of slow-light dispersion.
doi:10.1364/josab.25.000c65 fatcat:igqoum7izzdorazihlqtar2t24