Angular and Voltage dependence of tunable Mode in ferroelectric photonic crystals
Subject Areas : journal of Artificial Intelligence in Electrical Engineering
1 - Department of Physics, Ahar Branch, Islamic Azad University, Ahar, Iran
Keywords: Photonic crystal, tunable defect mode, electro-optical effect,
Abstract :
The influence of the variation in the incident angle and applied voltage on tunability of defect modes in a one-dimensional photonic crystal made of ferroelectric as a defect layer is theoretically studied for TE and TM polarizations. The amplitude of the TE-polarized defect mode decreases with increasing incident angle, whereas the amplitude of the TM-polarized defect mode increases. In the angle-dependent defect mode, its peak wavelength is shown to be blue-shifted as the angle of incidence increases for both TE and TM waves. In the voltage tuning, for two TE and TM polarized the defect modes are blue-shifted as the positive bias is applied, whereas they are red-shifted when the bias voltage is negative. With change incident angle, a tuning bandwidth up to 56nm is obtained by suitable change of applied voltage from -90to 90V. The analysis of defect mode provides useful information for the design of tunable transmission filter in optoelectronics.
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