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, […]
Tag Archives: Logic gates
Laser bursts drive fastest-ever logic gates
Phys.org May 11, 2022 Recently it was experimentally demonstrated that strong non-resonant few-cycle laser pulses can be used to induce phase-controllable currents along gold–silica–gold nanojunctions in the absence of a bias voltage. Since the effect depends on a highly non-equilibrium state of matter, its microscopic origin is unclear and the subject of recent controversy. An international team of researchers (Germany, USA – SLAC National Accelerator Laboratory, University of Rochester, Georgia State University, Los Alamos National Laboratory, Canada) has presented atomistically detailed electronic transport simulations that recover the main experimental observations and offered a simple intuitive picture of the effect. The […]