Three-dimensional optical storage inside transparent materials

被引:907
|
作者
Glezer, EN [1 ]
Milosavljevic, M [1 ]
Huang, L [1 ]
Finlay, RJ [1 ]
Her, TH [1 ]
Callan, JP [1 ]
Mazur, E [1 ]
机构
[1] HARVARD UNIV,DEPT PHYS,CAMBRIDGE,MA 02138
关键词
D O I
10.1364/OL.21.002023
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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.
引用
收藏
页码:2023 / 2025
页数:3
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