Kz component dependence of photonic band gap in Two-Dimensional Photonic Crystal

Off-plane band structure for triangular and square lattice with non-zero kz component were calculated using Plane Wave Expansion Method. Both decreasing, finally breaking down of in-plane band gaps and emerging of new off-plane band gaps were observed with an increasing k
_z
. K
_z
component dependence of band gap was investigated in both triangular and square lattice, with varied air hole radius and dielectric constant.