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      Investigation of femtosecond laser assisted nano and microscale modifications in lithium niobate

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          Writing waveguides in glass with a femtosecond laser

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            Femtosecond laser ablation of silicon–modification thresholds and morphology

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              Three-dimensional optical storage inside transparent materials.

              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-microm in-plane bit spacing and 15-microm interplane spacing (17 Gbits/cm(3)). Scanning electron microscopy and atomic force microscopy show structural changes confined to an area 200 nm in diameter.
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                Author and article information

                Journal
                Journal of Applied Physics
                Journal of Applied Physics
                AIP Publishing
                0021-8979
                1089-7550
                April 2005
                April 2005
                : 97
                : 7
                : 074316
                Article
                10.1063/1.1882763
                51db3c12-7f79-47e8-96ca-0050102a67fb
                © 2005
                History

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