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Two-photon-induced polarization-multiplexed and multilevel storage in photoisomeric copolymer film

Source: Opt. Lett. 35, 46 (2010); doi:10.1364/OL.35.000046

Published 2009-12-04

KEYWORDS and PACS
Keywords
PACS
  • 42.79.Vb
    Optical storage systems, optical disks
  • 82.50.-m
    Photochemistry
  • 82.30.Qt
    Isomerization and rearrangement in chemical reactions
  • 42.65.Re
    Ultrafast processes; optical pulse generation and pulse compression
  • 42.70.Jk
    Optical polymers and other organic optical materials
  • 42.79.Wc
    Optical coatings
  • YEAR: 2010
PUBLICATION DATA
ISSN:
1553-9601 (online)
Publisher:
AIP is a member of CrossRef OSA
Yanlei Hu,1 Zhoushun Zhang,2 Yuhang Chen,1 Qijin Zhang,2 and Wenhao Huang1
1Department of Precision Machinery and Precision Instrument, University of Science and Technology of China, Hefei, Anhui 230026, China
2CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Key Laboratory of Optoelectronic Science and Technology, Anhui Province, Hefei, Anhui 230026, China
We present a two-photon-induced polarization-multiplexed and multilevel data storage method with a bisazobenzene copolymer film. A polarization-adjustable femtosecond pulsed laser is used as writing beam to induce anisotropy, and the recorded information is retrieved by a CCD sensor from the film with corresponding polarized illumination. It is found that the optical axis of bisazobenzene molecules can be reoriented under two-photon excitation by the polarized femtosecond laser via a photoisomerization process. Polarization-multiplexed and multilevel storage is demonstrated by using this method. The capability to combine both advantages of these distinct techniques makes it a novel approach to obtain higher optical data density. ©2009 Optical Society of America

(As supplied by publisher.)

History: Received 4 August 2009; revised 17 November 2009; accepted 22 November 2009; published 2009-12-04
Permalink: http://dx.doi.org/10.1364/OL.35.000046

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