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Three-dimensional optical storage inside transparent materials
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DOI：10.1364/OL.21.002023.png)
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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-mu m in-plane bit spacing and 15-mu m interplane spacing (17 Gbits/cm(3)). Scanning electron microscopy and atomic force microscopy show structural changes confined to an area 200 nn in diameter. (C) 1996 Optical Society of America.
Keyword:
NANOSECOND
MEMORY
期刊
IF:
3.3
论文数:
4.0W
被引数:
7.6W
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