Design of optically controlled read and write memory unit with reversible logic gates using GaAs–AlGaAs-based micro-ring resonators

In this communication, the author has proposed a technique for developing an optical 1-bit read and write memory unit or optical random access memory (ORAM) using GaAs–AlGaAs-based micro-ring-resonators (MRR). The MRR shows resonance characteristics and acts as an optically controlled switch under the appropriate condition. Here, the author at first has explained the switching mechanism of MRR and then has designed wavelength-encoded reversible Controlled–controlled NOT gate using MRRs, and finally has explained a technique of designing the optical one-bit read and write memory unit or ORAM using Controlled–controlled NOT gates. The proposed memory unit can be used for both storing 1-bit information and reading the stored information. The theoretical models of the proposed schemes are testified with simulation results. MRR shows high integration potential, ultra-fast switching (near about 2.5 ps), good extinction ratio (near about 17 dB in the presence of pump beam), high data rate, etc. Therefore, it is expected that the proposed wavelength-encoded schemes will assist in building an ultra-high-speed communication network.