Tunability of defective one-dimensional photonic crystals based on Faraday effect

The effect of an external magnetic field on the transmittance characteristics of one-dimensional defective photonic crystal in UV radiations has been investigated. Our theoretical treatment is based on the fundamentals of the characteristic matrix method. The numerical results show that the external magnetic field has a significant effect on the permittivity of the defect layer. Therefore, the position and the intensity of the defect mode are strongly affected and the ability of tunability is expected. Moreover, the role played with the thickness of the defect mode on the defect peak is investigated. Wherefore, our structure may be suitable for many applications such as narrow band filter in UV radiations.