Paired modes of heterostructure cavities in photonic crystal waveguides with split band edges

摘要: We investigate the modes of double heterostructure cavities where underlying photonic crystal waveguide has been dispersion engineered to have two band-edges inside Brillouin zone. By deriving and using a perturbative method, we show that these structures possess modes. For unapodized cavities, relative detuning can be controlled by changing cavity length, for particular lengths, resonant-like effect makes degenerate. apodized no such resonances exist are always non-degenerate.