Enhanced omni-directional reflection frequency range in Si-based one dimensional photonic crystal with defect

In the present communication, we study omni-directional reflection in one-dimensional photonic crystal (PC) based on Si/SiO2 multilayered structure. It has been shown numerically that it is possible to enhance the range of omni-directional reflection in one-dimensional photonic crystal appreciably by introducing a defect in the multilayered structure.