Abstract: The properties of 2x2 photonic switching elements made of two intersecting waveguides coupled with two micro-rings were studied and it was shown that they can exhibit the effect of coupled-resonator induced transparency (CRIT). Employing the CRIT effect promises reduction of power consumption compared to standard switching techniques, and thus, the potential of utilizing a fast (but weak) electro-optic effect for switching control. Even though non-ideal waveguide crossings add noteworthy complexity, we demonstrated its practical value for designing ultra-low-power optical networks-on-chip.

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