Abstract
An asymmetric one-dimensional periodic waveguide is proposed for slowing light down. The waveguide consists of a straight dielectric strip and a single-side Bragg grating and thus is simple and easy for fabricating and has ultraflat dispersion relations in large wave-vector range supporting simultaneous ultralow-group-velocity- and zero-group-velocity-dispersion modes. It is numerically demonstrated that the modes can be localized in the waveguide.
© 2010 Optical Society of America
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