Phys.org February 13, 2023
An international team of researchers (China, Greece) employed silicon-on-silica waveguides for the all-optical realization of a complete family of logic gates, including NOT, XOR, AND, OR, NOR, NAND and XNOR operated at 1.55 μm. The waveguide consists of three identical slots and six microring resonators, all made of silicon patterned on silica. The principle of operation of these logic gates was based on the constructive and destructive interference induced by the phase difference between the input signals. The gates’ performance is evaluated against the contrast ratio (CR) metric. According to the researchers, compared to existing waveguides, the proposed waveguides achieve higher CRs with a speed as high as 120 Gb/s… read more.Accepted TECHNICAL Manuscript
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