Document Type : Research
Authors
1 Azarbaijan Shahid Madani University
2 Department of Physics,T Ahar Branch، Islamic Azad University، Ahar، Iran
Abstract
In this work, the effect of optical axis orientation on the transmission intensity of a terahertz filter in a magneto photonic crystal is studied. The transmission spectrum of the proposed structure with symmetric arrangement of (AB)7 InAs (BA)7 for both s and p polarizations is calculated using the 4×4 transfer matrix method where A, B layers are the common dielectric materials and InAs defect layer is an anisotropic semiconductor. The presence of defect layer will be cause to appear a defect mode (filter) inside the photonic band gap of the structure. The results show that band gap width and frequency location of the filter are independent of the changes of the optical axis angle but the dependence of transmission intensity on the optical axis direction it is possible to realization of Malus law of the proposed structure in the terahertz frequency range for both s and p polarizations. The trend of transmission intensity changes of the THz filter with the optical axis angle in the s (p) polarization has the opposite behavior to the p (s) polarization and the coupling of modes occurs at 450 optical axis angle. Also, The simultaneous effects of temperature and magnetic field intensity on the frequency localization and the filter transmission intensity in the range of changes in the optical axis angle have been investigated. The proposed structure can be used as a new polarizer in the terahertz frequency range.
Keywords
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