Designing an All-optical Diode based on a Nonlinear Directional Coupler
الموضوعات : Journal of Optoelectronical NanostructuresReyhaneh Rigi 1 , Keivan Navi 2 , Hojjat Sharifi 3
1 - Department of Computer Engineering, Islamic Azad University, Kerman, Iran
2 - Computer Science Department, California Polytechnic State University at Pomona, Pomona, CA, USA
3 - Department of Computer Engineering, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
الکلمات المفتاحية: All-optical diode, Photonic crystal, Nonlinear directional coupler, Kerr effect,
ملخص المقالة :
In the structure of photonic crystals, preventing the return of light is one of the main challenges in photonics. The importance of this issue is related to the amazing effect of the non-return of light on the permeability and accuracy of the photonic crystal structure. In this paper, an all-optical diode is designed to prevent light from returning and propagating across the photon crystal lattice. The proposed structures include a nonlinear directional coupler which allows phase change for different amounts of input power. Here, finite difference time domain methods and Plane Wave Expansion (PWE) are used to evaluate the proposed structures. The performance of the proposed structure was investigated considering the changes in wavelength, refractive index, and radius of the rods, which indicated its proper performance in different conditions. The simulation results showed that the speed of the proposed structure is about 1 Tbits/s and the required input power is about 3 watts.
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