Abstract
We propose a novel type of photonic crystal cavity with a flattened and elongated
central hole. The confinement capability of the cavity for the TE mode is studied using
the 2D-FDTD method. The holes immediately around the cavity are shifted in a space
modulation scheme in order to optimize the confinement capability of the proposed
cavity. The change in the spatial confinement as well as quality factor of the cavity
with respect to modulation depth are studied and reported. The ferroelectric Barium
Titanate BaTiO3, which has a large electrooptic coefficient, is used as
the base material of the proposed cavity. The effect of applied bias on the properties
of the cavity is also studied. To make the calculations as realistic as possible, the
dispersive and absorptive nature of the material has been taken into account. Despite
the absorptive nature of BaTiO3 as well as the finite extent of the photonic
crystal, the calculated quality factor compares favorably with previously reported
values in literature.
© 2012 IEEE
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