Transmission properties of one dimensional Photonic Crystals with defects

The transmission properties of one dimensional Photonic Crystals (PCs) with two defects having structures (HL) n (D1LD2L) m (HL) n, where m is the stack number of the Photonic Quantum Well (PQW) have been theoretically investigated by the transfer matrix method. The thickness and temperature dependence of the defect modes have been studied by considering Si and air as the high and low refractive index materials with GaAs and InSb as the two defects. This paper is to analyze the defect modes in two different regions of PBG such as PBG1 (393 nm – 701 nm) and PBG2(1055 nm2016 nm) by varying the thickness of the defect layers and the temperature of each layer. It was found that the number of defect modes are increased by changing the thickness of the defect layers. Also the shift in the transmittance peak gets decreased. Due to temperature variation of each layer, the two defect peaks in the transmittance spectrum when m=1, shift by 0.14 nm/ K and 0.15 nm/K in PBG1. In PBG2 the defect peaks shift by 0.44 nm/K and 0.50 nm/K . The above shifts for other cases (m ≠ 1) have also been studied.