Theoretical study on modulating group velocity of light in photonic crystal coupled cavity optical waveguide

Abstract

We present a novel mechanism,which is formed by periodically changing the radii of dielectric rods in the middle row of a photonic crystal, to control and stop light. Using the Bloch theory and coupled-mode theory, the dispersion characteristic of such a photonic crystal coupled cavity optical waveguide is obtained. We also theoretically demonstrate that the group velocity of a light pulse in this system can be modulated by dynamically changing the refractive index or radii of the selected dielectric rods, and the light stopping can be achieved.

Keywords

Resonant Frequency / Photonic Crystal / Group Velocity / Light Pulse / Couple Mode Theory

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This work has been supported by the National Natural Science Foundation of China (No.10874128).