Simultaneous Operation of Photonic Crystal ORXOR- NOT Gates with Minimum Size and High Bit Rate Ring Resonator-Interference Based Structure

Abstract

The OR-XOR-NOT gates are considered in this paper. They can be constructed in different topologies such as ring resonator, self-collimation, waveguide, and cavity-based structures. Linear and nonlinear materials are used to implement these gates in literature. In this paper, the proposed design is formed in a linear photonic crystal square lattice floor with ring resonator topology and interference based operation. By applying sensitivity analysis and by organizing the location of some rods; the OR-XOR NOT gates are verified. Simultaneous operation, minimum area structure and high bit rate are the remarkable figures of merits for this design. The minimum size of $56.16\mathrm{\mu m}^{2}$ is obtained. The bit rates of $5.02\mathrm{~Tb}/\mathrm{s}$, and 3.1Tpbs are calculated for OR, and XOR respectively. As the NOT-gate operation is a part of the XOR; so, it can be verified in this paper. The phase shift between the input powers and their effect are examined carefully. The threshold power level is considered as 0.3. Comparative tables are organized for both gates based on ring resonator topology. The fabrication methods are discussed and evaluated. These structures are designed, simulated and optimized at $1.55\mu\mathrm{m}$ wavelength to verify OR-XOR-NOT gates.