Abstract
In this research, our study aims at optimizing a new design of all-optical logic gates with higher performances by simulation. This new structure is essentially based on the interference effect using a T-shaped and cross-shaped waveguide which is realized by three nano-resonators with PhCs. The physical parameters of NOT/XOR(LG 1 ) and OR/XOR(LG 2 ) are optimized to operate the telecommunication wavelength equal to 1550nm. For practical use, it must have a fast response time and its characteristics are improved: high transmission power, maximally contrast ratio of the two logic gates equal to 62.38 dB. In addition, this design presented an ultra-compact size of 72.7 $\mu m^{2}$ to facilitate its integration into all-optical integrated telecommunication circuits.
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