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Proceedings Paper

Photoinduced birefringence and cooperative molecular reorientation in azo copolymer: optical characterization for rewritable memory application
Author(s): Takashi Fukuda; Jun Young Kim; Daisuke Barada; Kiyoshi Yase
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Paper Abstract

In this paper, new azobenzene copolymers (PCDY and PPDY) with large photoinduced birefringence and good long-term stability of a recorded data have been introduced. The largest photoinduced value of 0.289 was obtained on the PCDY50 at 458 nm light irradiation. This value was brought about a result of molecular cooperative reorientation of cyanoazo and bisazobenzene moieties. It should be noted that the PCDY50 exhibited quite stable characteristics on the archival viewpoint. Furthermore, if we can optimize experimental conditions, more than 105 cycles of reversible data storage could be achieved. Making use of these superior characteristics of the PCDY50, an application for rewritable holographic memory and/or other optical addressable devices is anticipated.

Paper Details

Date Published: 27 February 2006
PDF: 10 pages
Proc. SPIE 6136, Practical Holography XX: Materials and Applications, 61360Y (27 February 2006); doi: 10.1117/12.639855
Show Author Affiliations
Takashi Fukuda, National Institute of Advanced Industrial Science and Technology (Japan)
Jun Young Kim, National Institute of Advanced Industrial Science and Technology (Japan)
Daisuke Barada, National Institute of Advanced Industrial Science and Technology (Japan)
Kiyoshi Yase, National Institute of Advanced Industrial Science and Technology (Japan)


Published in SPIE Proceedings Vol. 6136:
Practical Holography XX: Materials and Applications
Hans I. Bjelkhagen; Roger A. Lessard, Editor(s)

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