In-memory computing on a photonic platform
By Carlos Ríos, N. Youngblood, Zengguang Cheng, M. L. Gallo, Wolfram H. P. Pernice, David Wright, Abu Sebastian, Harish Bhaskaran. Science Advances, 2018
339 citations recorded by the source corpus.
Nonvolatile multilevel phase-change memories on integrated photonic devices enable all-optical direct in-memory multiplications. Collocated data processing and storage are the norm in biological computing systems such as the mammalian brain. As our ability to create better hardware improves, new computational paradigms are being explored beyond von Neumann architectures. Integrated photonic circuits are an attractive solution for on-chip computing which can leverage the increased speed and bandwidth potential of the optical domain, and importantly, remove the need for electro-optical conversions. Here we show that we can combine integrated optics with collocated data storage and processing to enable all-photonic in-memory computations. By employing nonvolatile photonic elements based on the phase-change material, Ge2Sb2Te5, we achieve direct scalar and matrix-vector multiplication, featuring a novel single-shot Write/Erase and a drift-free process. The output pulse, carrying the information of the light-matter interaction, is the result of the computation. Our all-optical approach is novel, easy to fabricate and operate, and sets the stage for development of entirely photonic computers.
Subfields: Artificial Intelligence, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/c1e6f414a7bc78e196a7a3ecc427cc9fc0446d0d
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In Electrical and Electronic Engineering
Citations in the corpus
- Miniature Multilevel Optical Memristive Switch Using Phase Change Material (2019, background): “Such features have led to the development of on-chip non-volatile photonic applications, such as nanopixel display [16, 17], photonic synapse [18, 19], optical computing [20], and optical switching [21-24].”
- Ultra-compact nonvolatile phase shifter based on electrically reprogrammable transparent phase change materials (2021, background): “Other alternatives for transparent microheaters, already demonstrated to switch PCMs, might be considered to avoid doping losses overall and extend the transparency window to shorter wavelengths, such as graphene, [38, 40] fluorine-doped tin oxide, [41] and indium-tin-oxide; [39, 42] however, their ”