Open AccessRecording and reconstruction of volumetric magnetic hologram using multilayer medium with heat dissipation layers
Author(s) -
Yūichi Nakamura,
Pang Boey Lim,
Taichi Goto,
Hironaga Uchida,
M. Inoue
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.027573
Subject(s) - holography , materials science , heat assisted magnetic recording , optics , dissipation , optical recording , optical storage , diffraction efficiency , diffraction , optoelectronics , acoustics , physics , transducer , thermodynamics
Hologram memory is a strong candidate for optical storage due to its high recording density and high data transfer rate. We have studied and engineered a magnetic hologram memory medium using a stable magnetic garnet as recording material. To record a deep and clear magnetic hologram, it is important to control the heat diffusion generated during recording. Numerical simulation suggested that a multilayer structure with transparent heat-dissipation layers would be effective to address this. We fabricated a multilayer magnetic medium for a collinear magnetic hologram. This medium exhibited a diffraction efficiency as high as that of the single layered one, and errorless recording and reconstruction was achieved with the magnetic assist technique.