Scalable non-volatile tuning of photonic computational memories by automated silicon ion implantation

Photonic integrated circuits (PICs) are revolutionising the realm of information technology, promising unprecedented speeds and efficiency in data processing and optical communication.  The nanoscale precision required to fabricate these circuits at scale, however, presents significant challenges due to the need to maintain consistency across wavelength-selective components which necessitate individualised adjustments after fabrication.

Harnessing spectral alignment by automated silicon ion implantation, in this work* scalable and non-volatile photonic computational memories were demonstrated in high-quality resonant devices.  Precise spectral trimming of large-scale photonic ensembles from a few picometers to several nanometers was achieved with long term stability and marginal loss penalty.

Based on the above approach, spectrally aligned photonic memory and computing systems for general matrix multiplication were demonstrated, enabling wavelength multiplexed integrated architectures at large scales.

*'Scalable non-volatile tuning of photonic computational memories by automated silicon ion implantation' as published in Advanced Materials.