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Optics Letters

Optics Letters


  • Vol. 21, Iss. 24 — Dec. 15, 1996
  • pp: 2023–2025

Three-dimensional optical storage inside transparent materials

E. N. Glezer, M. Milosavljevic, L. Huang, R. J. Finlay, T.-H. Her, J. P. Callan, and E. Mazur  »View Author Affiliations

Optics Letters, Vol. 21, Issue 24, pp. 2023-2025 (1996)

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We present a novel method for three-dimensional optical data storage that has submicrometer size resolution, provides a large contrast in index of refraction, and is applicable to a wide range of transparent materials. Bits are recorded by use of a 0.65-N.A. objective to focus 100-fs laser pulses inside the material. The laser pulse produces a submicrometer-diameter structurally altered region with high contrast in index of refraction. We record binary information by writing such bits in multiple planes and read it out with a microscope objective with a short depth of field. We demonstrate data storage and retrieval with 2-μm in-plane bit spacing and 15-μm interplane spacing (17 Gbits/cm3). Scanning electron microscopy and atomic force microscopy show structural changes confined to an area 200 nm in diameter.

© 1996 Optical Society of America

Original Manuscript: July 26, 1996
Published: December 15, 1996

E. N. Glezer, M. Milosavljevic, L. Huang, R. J. Finlay, T.-H. Her, J. P. Callan, and E. Mazur, "Three-dimensional optical storage inside transparent materials," Opt. Lett. 21, 2023-2025 (1996)

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