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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 1 — Jan. 1, 2010
  • pp: 46–48

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

Yanlei Hu, Zhoushun Zhang, Yuhang Chen, Qijin Zhang, and Wenhao Huang  »View Author Affiliations

Optics Letters, Vol. 35, Issue 1, pp. 46-48 (2010)

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We present a two-photon-induced polarization-multiplexed and multilevel data storage method with a bis azobenzene 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

OCIS Codes
(190.4180) Nonlinear optics : Multiphoton processes
(210.0210) Optical data storage : Optical data storage
(210.4680) Optical data storage : Optical memories
(210.4770) Optical data storage : Optical recording

ToC Category:
Optical Data Storage

Original Manuscript: August 4, 2009
Revised Manuscript: November 17, 2009
Manuscript Accepted: November 22, 2009
Published: December 24, 2009

Yanlei Hu, Zhoushun Zhang, Yuhang Chen, Qijin Zhang, and Wenhao Huang, "Two-photon-induced polarization-multiplexed and multilevel storage in photoisomeric copolymer film," Opt. Lett. 35, 46-48 (2010)

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