Design and modelling of a novel integrated photonic device for nano-scale magnetic memory reading

Figen Ece Demirer (Corresponding author), Chris van den Bomen, Reinoud Lavrijsen, Jos J.G.M. van der Tol, Bert Koopmans

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Design and simulations of an integrated photonic device that can optically detect the magnetization direction of its ultra-thin (∼12 nm) metal cladding, thus ‘reading’ the stored magnetic memory, are presented. The device is an unbalanced Mach Zehnder Interferometer (MZI) based on InP Membrane on Silicon (IMOS) platform. The MZI consists of a ferromagnetic thin-film cladding and a delay line in one branch, and a polarization converter in the other. It quantitatively measures the non-reciprocal phase shift caused by the Magneto-Optic Kerr Effect in the guided mode which depends on the memory bit’s magnetization direction. The current design is an analytical tool for research exploration of all-optical magnetic memory reading. It has been shown that the device is able to read a nanoscale memory bit (400 × 50 × 12 nm) by using a Kerr rotation as small as 0.2, in the presence of a noise ∼10 dB in terms of signal-to-noise ratio. The device is shown to tolerate performance reductions that can arise during the fabrication.

Original languageEnglish
Article number8267
Number of pages9
JournalApplied Sciences (Switzerland)
Volume10
Issue number22
DOIs
Publication statusPublished - 2 Nov 2020

Keywords

  • Fourier transformation
  • InP
  • Integrated photonics
  • Magnetic memory
  • Magneto-optic
  • Mode conversion
  • MOKE
  • Multi-layered thin film
  • MZI
  • PMA

Fingerprint Dive into the research topics of 'Design and modelling of a novel integrated photonic device for nano-scale magnetic memory reading'. Together they form a unique fingerprint.

Cite this