Silicon Reconfigurable Electro-Optical Logic Circuit Enabled by a Single-Wavelength Light Input

Here, we demonstrate a silicon reconfigurable electro-optical directed-logic circuit enabled by a single-wavelength light input based on optical switches and photodetectors (PDs). Each switch consists of a silicon micro-ring resonator with an embedded p-n junction for logic input and a micro-heater for reconfiguration. The PDs have integrated p-i-n junctions for photocurrents generation which can eliminate the optical interference in the signal-wavelength calculation. This scalable circuit can be reconfigured to perform any combinational logic operation with a single wavelength light input. For a proof of concept demonstration, arbitrary two-input combinational logic functions with speeds up to ~270 Mb/s were implemented successfully.