Optical Reading of Nanoscale Magnetic Bits in an Integrated Photonic Platform
| Autor: | Hamed Pezeshki, Pingzhi Li, Reinoud Lavrijsen, Jos J. G. M. van der Tol, Bert Koopmans |
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| Přispěvatelé: | Physics of Nanostructures, Photonic Integration, EIRES, Eindhoven Hendrik Casimir institute, ICMS Affiliated, Center for Care & Cure Technology Eindhoven |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
spintronics
polar magneto-optical Kerr effect Condensed Matter - Mesoscale and Nanoscale Physics FOS: Physical sciences indium phosphide Applied Physics (physics.app-ph) Physics - Applied Physics Condensed Matter Physics Atomic and Molecular Physics and Optics Photonic integrated circuits Magneto-plasmonics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) cond-mat.mes-hall Plasmonics physics.optics Electrical and Electronic Engineering physics.app-ph Optics (physics.optics) Physics - Optics |
| Zdroj: | arXiv, 2022:2208.02560. Cornell University Library Pure TUe IEEE Journal of Quantum Electronics, 59(3):0600808. Institute of Electrical and Electronics Engineers IEEE Xplore |
| ISSN: | 0018-9197 |
| Popis: | 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 can detect the magnetization states in targeted bits in a magnetic racetrack medium down to ~100×100 nm2, regardless of the magnetization state of the rest of the racetrack with a relative intensity contrast of greater than 0.5% for a ~200×100 nm2magnetic bit. We believe our hybrid device can be an enabling technology that can connect integrated photonics with nanoscale spintronics, paving the way toward ultrafast and energy efficient advanced on-chip applications. |
| Databáze: | OpenAIRE |
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