Nonvolatile programmable silicon photonics using an ultralow-loss Sb 2 Se 3 phase change material.

Autor: Delaney M; Zepler Institute, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK.; Physics and Astronomy, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK., Zeimpekis I; Zepler Institute, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK., Du H; Zepler Institute, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK., Yan X; Zepler Institute, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK., Banakar M; Zepler Institute, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK., Thomson DJ; Zepler Institute, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK., Hewak DW; Zepler Institute, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK., Muskens OL; Physics and Astronomy, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ Southampton, UK. o.muskens@soton.ac.uk.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2021 Jun 16; Vol. 7 (25). Date of Electronic Publication: 2021 Jun 16 (Print Publication: 2021).
DOI: 10.1126/sciadv.abg3500
Abstrakt: The next generation of silicon-based photonic processors and neural and quantum networks need to be adaptable, reconfigurable, and programmable. Phase change technology offers proven nonvolatile electronic programmability; however, the materials used to date have shown prohibitively high optical losses, which are incompatible with integrated photonic platforms. Here, we demonstrate the capability of the previously unexplored material Sb 2 Se 3 for ultralow-loss programmable silicon photonics. The favorable combination of large refractive index contrast and ultralow losses seen in Sb 2 Se 3 facilitates an unprecedented optical phase control exceeding 10π radians in a Mach-Zehnder interferometer. To demonstrate full control over the flow of light, we introduce nanophotonic digital patterning as a previously unexplored conceptual approach with a footprint orders of magnitude smaller than state-of-the-art interferometer meshes. Our approach enables a wealth of possibilities in high-density reconfiguration of optical functionalities on silicon chip.
(Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).)
Databáze: MEDLINE
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