Integrated Hybrid Plasmonic-Photonic Device for All-Optical Switching and Reading of Spintronic Memory

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Samenvatting

We introduce a hybrid plasmonic-photonic device for on-chip all-optical switching and reading of ferrimagnet bits with perpendicular magnetic anisotropy in a racetrack spintronic memory, coupled onto an indium phosphide waveguide. The device comprises V-shaped gold plasmonic nanoantennas coupled with a photonic crystal cavity, which enables switching and reading of the magnetic state of nanoscale bits by enhancing the absorbed energy density and polar magneto-optical Kerr effect locally. Using a finite-difference time-domain method, we show that our device can switch and read targeted bits down to 100 nm in the presence of oppositely magnetized background regions in the racetrack with widths up to 120 nm, clearly outperforming a bare photonic waveguide. Our hybrid device provides the missing link between integrated photonics and nanoscale spintronics by tackling the challenges of nonlinear absorption in the waveguide, weak magneto-optics, and size mismatch, leading to the development of ultrafast and energy-efficient advanced on-chip applications.

Originele taal-2Engels
Artikelnummer054036
Aantal pagina's14
TijdschriftPhysical Review Applied
Volume19
Nummer van het tijdschrift5
DOI's
StatusGepubliceerd - mei 2023

Bibliografische nota

Funding Information:
This work is part of the Gravitation program “Research Centre for Integrated Nanophotonics,” which is financed by the Netherlands Organisation for Scientific Research (NWO). This project has also received funding from the European Union’s Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant Agreement No. 860060.

Publisher Copyright:
© 2023 American Physical Society.

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