Loading [a11y]/accessibility-menu.js
Optical Reading of Nanoscale Magnetic Bits in an Integrated Photonic Platform | IEEE Journals & Magazine | IEEE Xplore

Optical Reading of Nanoscale Magnetic Bits in an Integrated Photonic Platform


Impact Statement:We showed a hybrid plasmonic-photonic device for on-chip optical reading of nanoscale ferromagnet bits with perpendicular magnetic anisotropy in a magnetic racetrack coup...Show More

Abstract:

In this paper, we propose a compact integrated hybrid plasmonic-photonic device for optical reading of nanoscale magnetic bits with perpendicular magnetic anisotropy in a...Show More
Impact Statement:
We showed a hybrid plasmonic-photonic device for on-chip optical reading of nanoscale ferromagnet bits with perpendicular magnetic anisotropy in a magnetic racetrack coupled on top of a photonic waveguide on the indium phosphide membrane on silicon platform. This device enhances the polar magneto-optical Kerr effect (PMOKE) at nanoscale and enables detection of the magnetization state in nanoscale magnetic bits. By combining our device with a plasmonic polarization rotator, we present a read-out method by converting the PMOKE-induced polarization change into an intensity variation of the waveguide mode, detectable using a photodetector. The simulations result shows the device can detect the magnetization state in targeted bits down to ~100 2 nm 2 regardless of the background magnetization state. We believe this device can have a potential impact on direct optical read-out and can encode information in the optical state.

Abstract:

In this paper, we propose a compact integrated hybrid plasmonic-photonic device for optical reading of nanoscale magnetic bits with perpendicular magnetic anisotropy in a magnetic racetrack on top of a photonic waveguide on the indium phosphide membrane on silicon platform. The hybrid device is constructed by coupling a doublet of V-shaped gold plasmonic nanoantennas on top of the indium phosphide waveguide. By taking advantage of the localized surface plasmons, our hybrid device can enable detection of the magnetization state in magnetic bits beyond the diffraction limit of light and enhance the polar magneto-optical Kerr effect (PMOKE). We further illustrate how combining the hybrid device with a plasmonic polarization rotator provides magneto-optical read-out by transforming the PMOKE-induced polarization change into an intensity variation of the waveguide mode. According to the simulation results based on a three-dimensional finite-difference time-domain method, the hybrid device c...
Published in: IEEE Journal of Quantum Electronics ( Volume: 59, Issue: 3, June 2023)
Article Sequence Number: 0600808
Date of Publication: 24 November 2022

ISSN Information:

Funding Agency:


References

References is not available for this document.