All optical NOT and NOR gates using interference in the structures based on 2D linear photonic crystal ring resonator

Abstract

All optical NOT and NOR logic gates using structures based on linear photonic crystal ring resonator (LPhCRR) are proposed in this paper. The switching function of the proposed gates can be obtained at very small power levels as it relies on the interference effect. Moreover, their functioning is possible with wide range of input powers and tolerant to input power fluctuations (as those work in linear optics regime). Optical behavior of the purposed structures is demonstrated by using Two Dimensional Finite Difference Time Domain (2DFDTD) method and dispersion diagram is extracted by Plane Wave Expansion (PWE) method. Performance of the proposed structures is found to be very good in terms of response time and contrast ratio.