TY - JOUR T1 - Defect Structures in a layer-by-layer Photonic band gap crystal A1 - Ozbay, E. A1 - Tuttle, G. A1 - Sigalas, M. A1 - Soukoulis, C.M. A1 - Ho, K.M. JA - Physical Review B Y1 - 1995 VL - 51 SP - 13961 EP - 13965 ER -