Dispersion of coupled mode-gap cavities

Abstract

The dispersion of a CROW made of photonic crystal mode-gap cavities is pronouncedly asymmetric. This asymmetry cannot be explained by the standard tight binding model. We show that the fundamental cause of the asymmetric dispersion is the fact that the cavity mode profile itself is dispersive, i.e., the mode wave function depends on the driving frequency, not the eigenfrequency. This occurs because the photonic crystal cavity resonances do not form a complete set. By taking into account the dispersive mode profile, we formulate a mode coupling model that accurately describes the asymmetric dispersion without introducing any new free parameters.

4 pages, 4 figures

References in corpus (4)

• Imaging topological edge states in silicon photonics
• Quantum Many-Body Phenomena in Coupled Cavity Arrays
• Stopping and Time Reversal of Light in Dynamic Photonic Structures via Bloch Oscillations
• Dispersion and light transport characteristics of large-scale photonic-crystal coupled nanocavity arrays

Cited by in corpus (2)

• Fano lines in the reflection spectrum of directly coupled systems of waveguides and cavities: measurements, modeling and manipulation of the Fano asymmetry
• Thermo-optical dynamics of a nonlinear GaInP photonic crystal nanocavity depend on the optical mode profile