This paper tries to design and simulate a majority gate with three inputs based on the resonance ring of 2D photonic crystals. In the design of this gate, a resonator gate and 4 waveguides in a square lattice have been used. This structure is simple and small with dielectric rods of silicon on an air substrate. Low and high logics are de ned based on the optical sources being on or off. The large interval between 0 and 1 at the output demonstrates high accuracy of this optical gate. The operating wavelength of this optical majority gate is 1.55µm, which is in the photonic band-gap calculated for the gate structure. Calculations are carried out in the TM mode using the FDTD numerical method.

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This paper tries to design and simulate a majority gate with three inputs based on the resonance ring of 2D photonic crystals. In the design of this gate, a resonator gate and 4 waveguides in a square lattice have been used. This structure is simple and small with dielectric rods of silicon on an air substrate. Low and high logics are defined based on the optical sources being on or off. The large interval between 0 and 1 at the output demonstrates high accuracy of this optical gate. The operating wavelength of this optical majority gate is 1.55µm, which is in the photonic band-gap calculated for the gate structure. Calculations are carried out in the TM mode using the FDTD numerical method.