Photonic band gaps of two-dimensional ZnO nanorod photionic crystals

We have calculated the photonic band structures of two-dimensional periodic arrays of well aligned ZnO nanorods with a frequency dependent dielectric constant. The ZnO nanorod photonic crystal can exhibit a photonic band gap in the visible range. The dependence of the band gap on the period and radii of the nanorods was shown. From the finite difference time domain simulations, we also showed that the luminescence of a ZnO nanorod could be altered by the photonic band gap effect. Controlling the luminescence of ZnO nanorods can be useful in the implementation of efficient light emitting devices.