Three-Dimensional Optical Storage Inside Transparent Materials

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Three-Dimensional Optical Storage Inside Transparent Materials

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Title: Three-Dimensional Optical Storage Inside Transparent Materials
Author: Glezer, E. N.; Milosavljevic, M.; Huang, L.; Finlay, R. J.; Her, T. -H.; Callan, J. P.; Mazur, Eric

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Citation: Glezer, E. N., M. Milosavljevic, L. Huang, R. J. Finlay, T.-H. Her, J. P. Callan, and Eric Mazur. 1996. Three-dimensional optical storage inside transparent materials. Optics Letters 21(24): 2023-2025.
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Abstract: 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/cm^3). Scanning electron microscopy and atomic force microscopy show structural changes confined to an area 200 nm in diameter.
Published Version: doi:10.1364/OL.21.002023
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