Abstract

Hologram memory is expected to be the next-generation of optical data storage technology. Bismuth-substituted yttrium iron garnet is typically used for rewritable magnetic hologram media. The diffraction efficiency of magnetic holography depends on the Faraday rotation angle, but the experimental diffraction efficiency is not as high as that expected from calculations. This difference could be caused by incomplete magnetization reversal at the recorded region. In this study, we investigated the effects of magnetic assist (MA) recording through numerical simulation and experiment to improve the diffraction efficiency and the resulting reconstructed images. The improvement of diffraction efficiency was more effective in garnet films thinner than the width of a fringe, and a suitable value of the assist magnetic field was identified for the improvement. In addition, MA recording improved the intensity of reconstructed images and broadened the non-error recording conditions to the low energy region. This technique shows promise in improving the reconstructed quality of magnetic hologram data.

Details

Title
Reconstruction of non-error magnetic hologram data by magnetic assist recording
Author
Shirakashi, Zen 1 ; Goto, Taichi 2   VIAFID ORCID Logo  ; Takagi, Hiroyuki 1 ; Nakamura, Yuichi 1 ; Pang Boey Lim 1 ; Uchida, Hironaga 1 ; Inoue, Mitsuteru 1 

 Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, Japan 
 Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, Japan; JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, Japan 
Pages
1-8
Publication year
2017
Publication date
Oct 2017
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
1957851753
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.