Study of transmission property of periodic layer consisting of SiO2 and TiO2 layers with anisotropic liquid crystal (LC) and LiNbO3 as defect layers for optical switching

oleh: Pawan Singh, Khem B. Thapa, Narinder Kumar, Devendra Singh, Devesh Kumar

Format: Article
Diterbitkan: Elsevier 2019-06-01

Deskripsi

This paper reports the theoretical investigation of transmission properties of a one-dimensional periodic layer consisting of SiO2 and TiO2 layers with anisotropic liquid crystal (LC) and LiNbO3as defect layers with the variation of incident angle, temperature and applied a voltage across the crystal. The optical transmission properties of the considered structure have been calculated by using a 4 × 4 transfer matrix method (TMM). The transmittance of the considered structure with LC and LiNbO3as defects gives rise to defect mode wavelength peak inside the bandgap region. The transmittance peak of the defect mode shows the blue shift in the transmission of periodic structure for TE and TM polarizations with incident angle, applied voltage, and temperature. Further, the transmission behavior of defect modes and terminal wavelengths are analyzed with the variation of incident angle and temperature. The transmission of the considered structure has found the tunable characteristics due to the presence of anisotropic defect layer LC and LiNbO3. The one-dimensional periodic layer consisting of SiO2 and TiO2 layers with the defect layers of anisotropic materials, liquid crystal (LC) and LiNbO3, as may be used to design optical switching devices. Keywords: Anisotropic liquid crystal (LC), LiNbO3, 4 × 4 transfer matrix method (TMM), Blue shift