Induced transparency in double-ring photonic switches for optical Networks-on-Chip

We studied the properties of 2×2 photonic switching elements made of two intersecting waveguides coupled with two micro-rings and showed 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.