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Recently, interest in programmable photonics integrated circuits has grown asa potential hardware framework for deep neural networks, quantum computing, andfield programmable arrays (FPGAs). However, these circuits are constrained bythe limited tuning speed and large power consumption of the phase shiftersused. In this paper, introduced for the first time are memresonators, ormemristors heterogeneously integrated with silicon photonic microringresonators, as phase shifters with non-volatile memory. These devices arecapable of retention times of 12 hours, switching voltages lower than 5 V, anendurance of 1,000 switching cycles. Also, these memresonators have beenswitched using voltage pulses as short as 300 ps with a record low switchingenergy of 0.15 pJ. Furthermore, these memresonators are fabricated on aheterogeneous III-V/Si platform capable of integrating a rich family of active,passive, and non-linear optoelectronic devices, such as lasers and detectors,directly on-chip to enable in-memory photonic computing and further advance thescalability of integrated photonic processor circuits.

High-Speed and Energy-Efficient Non-Volatile Silicon Photonic Memory Based on Heterogeneously Integrated Memresonator