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An optical diode consisting of cascaded silicon micro-resonators enables non-reciprocal transmission through direction dependent resonance shift. One-way 10Gbps data transmission is realized through the strong dispersion and attenuation associated with a resonant structure.
An add-drop filter with asymmetric coupling to bus waveguides, cascaded with a notch filter, achieves diode and transistor effects, and realizes NAND and NOR logic without physically altering the device, emulating the function of neurons.
We demonstrate an optical diode with up to 28dB transmission contrast at telecommunication wavelengths. It is based on strong optical nonlinearity in two resonance-matched silicon microrings. No external assistance other than input light is required.
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