Abstract:
We theoretically study the interaction between dual cavity modes in a planar photonic microcavity
structure in the optical communication wavelength range. The merging and splitting of cavity mode
is analysed with realistic microcavity structures. The merging of dual cavity resonance into a single
cavity resonance is achieved by changing the number of layers between the two cavities. The splitting
of single cavity resonance into dual cavity resonance is obtained with an increase in the reflectivity
of mirrors in the front and rear side of the microcavity structure. The threshold condition for the
merging and splitting of cavity mode is established in terms of structural parameters. The physical
origin of the merging of dual cavity modes into a single cavity resonance is discussed in terms of
the electric field intensity distribution in the microcavity structure. The microcavity structure with
dual cavity modes is useful for the generation of entangled photon pairs, for achieving the strongcoupling regime between exciton and photon and for high-resolution multi-wavelength filters in
optical communication.
