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Integrated phase-change photonic devices and systems

Published online by Cambridge University Press:  05 September 2019

C. David Wright ,
Harish Bhaskaran  and
Wolfram H.P. Pernice
C. David Wright
Affiliation:
Department of Engineering, University of Exeter, UK; david.wright@exeter.ac.uk
Harish Bhaskaran
Affiliation:
Department of Materials, University of Oxford, UK; harish.bhaskaran@materials.ox.ac.uk
Wolfram H.P. Pernice
Affiliation:
Department of Physics, University of Münster, Germany; wolfram.pernice@uni-muenster.de
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Abstract

Driven by the rapid rise of silicon photonics, optical signaling is moving from the realm of long-distance communications to chip-to-chip, and even on-chip domains. If on-chip signaling becomes optical, we should consider what more we might do with light than just communicate. We might, for example, set goals for the storing and processing of information directly in the optical domain. Doing this might enable us to supplement, or even surpass, the performance of electronic processors, by exploiting the ultrahigh bandwidth and wavelength division multiplexing capabilities offered by optics. In this article, we show how, by using an integrated photonics platform that embeds chalcogenide phase-change materials into standard silicon photonics circuits, we can achieve some of these goals. Specifically, we show that a phase-change integrated photonics platform can deliver binary and multilevel memory, arithmetic and logic processing, as well as synaptic and neuronal mimics for use in neuromorphic, or brain-like, computing—all working directly in the optical domain.

Keywords

memoryphase transformationnucleation and growth
Type
Phase-Change Materials in Electronics and Photonics
Information
MRS Bulletin , Volume 44 , Issue 9: Phase-Change Materials in Electronics and Photonics , September 2019 , pp. 721 - 727
Copyright
Copyright © Materials Research Society 2019 

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