A novel proposal for OR/NOR logic gates based on dipole-induced transparency

This paper proposes a novel structure for realization of the OR/NOR logic gates. The structure, consists of a Λ-type 3-level quantum dot localized in a single mode photonic crystal cavity and coupled symmetrically to two different parallel waveguides. The probe field is guided by the two waveguide while the control field is applied vertically to the photonic crystal cavity. Absence of the control field results propagation of the probe field in waveguide and mutually, in the presence of the control field, probe field switches to the other waveguide. Two data stream are combined by a coupler and it constructs the control filed. The finite-difference time-domain algorithm are used for solving coupled Heisenberg equations. Simulations and results show that the proposed logic gates can operate at the range of up to 5 Gb/s.