Thermomagnetic writing into magnetophotonic microcavities controlling thermal diffusion for volumetric magnetic holography

Optics Express
Ryosuke IsogaiMitsuteru Inoue

Abstract

Holographic memory is expected to become a high-capacity data storage. Magnetic volumetric holograms are rewritable holograms that are recorded as magnetization directions through thermomagnetic recording. However, the effective depth of magnetic holograms is limited by thermal diffusion that causes merging of magnetic fringes. In this study, we propose the insertion of heat-sink layers (HSLs) for retaining well-defined magnetic fringes during volumetric writing. Magnetophotonic microcavity media were used for demonstrating the HSL effect, and the structural design principle was established in numerical calculations. The results indicate that deep and clear magnetic fringes and an improvement in the diffraction efficiency can be achieved by the insertion of HSLs.

References

May 11, 2005·Applied Optics·Hideyoshi HorimaiJun Li
Apr 28, 2006·Optics Letters·Tsutomu ShimuraHideyoshi Horimai
May 15, 1948·Nature·D GABOR
Jul 1, 1994·Optics Letters·K CurtisD Psaltis
Oct 1, 1970·Applied Optics·R S Mezrich
Jul 1, 2014·Optics Express·Yuichi NakamuraMitsuteru Inoue
Jun 16, 2015·Optics Express·Ryosuke IsogaiMitsuteru Inoue

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Citations

Nov 15, 2017·Scientific Reports·Ryohei MorimotoMitsuteru Inoue
Nov 10, 2016·Optics Express·Dusan SarenacDmitry A Pushin
Oct 11, 2017·Scientific Reports·Zen ShirakashiMitsuteru Inoue

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