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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 12 — Jun. 13, 2005
  • pp: 4560–4567

Three-dimensional optical memory using a human fingernail

Akihiro Takita, Hirotsugu Yamamoto, Yoshio Hayasaki, Nobuo Nishida, and Hiroaki Misawa  »View Author Affiliations

Optics Express, Vol. 13, Issue 12, pp. 4560-4567 (2005)

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We realized optical data storage in a human fingernail. A structural change is recorded by irradiating a focused femtosecond laser pulse and is read out with fluorescent observation by making use of an increased fluorescence intensity. The shape of the structural changes drastically depends on the irradiated pulse energy. The fluorescence spectrum of the structure coincided with the auto-fluorescence spectra of a fingernail and a heated fingernail. It is suggested that the increased fluorescence is most likely caused by a local denaturation of the keratin protein by the femtosecond laser pulse irradiation. We demonstrate that the increased fluorescence effect is useful for reading out three-dimensionally recorded data.

© 2005 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(210.4680) Optical data storage : Optical memories
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Research Papers

Original Manuscript: February 28, 2005
Revised Manuscript: May 30, 2005
Published: June 13, 2005

Akihiro Takita, Hirotsugu Yamamoto, Yoshio Hayasaki, Nobuo Nishida, and Hiroaki Misawa, "Three-dimensional optical memory using a human fingernail," Opt. Express 13, 4560-4567 (2005)

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