.Photonic band gap of 2D complex lattice photonic crystal[J].Optoelectronics Letters,2009,5(2):120-123 Photonic band gap of 2D complex lattice photonic crystal 关春颖  苑立波 College of Science, Harbin Engineering University, Harbin 130001,China ? Abstract:       It is of great significance to present a photonic crystal lattice structure with a wide photonic bandgap. A two-dimension complex lattice photonic crystal is proposed. The photonic crystal is composed of complex lattices with triangular structure, and each single cell is surrounded by six scatterers in an hexagon. The photonic band gaps are calculated based on the plane wave expansion (PWE) method. The results indicate that the photonic crystal has tunable large TM polarization band gap, and a gap-midgap ratio of up to 45.6%. Hits: 3613 Download times: 218 View Full Text    Download reader