Chinese Optics Letters, 2006, 4 (2): 02111, Published Online: Jun. 6, 2006   

Three-dimensional multilevel memory based on laser-polarization-dependence birefringence Download: 706次

Author Affiliations
1 State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068
2 Applied Physics Institute, Zhejiang Wanli College, Ningbo 315101
Abstract
The femtosecond laser-modified region in isotropic glass medium shows a big optical birefringence. Transmission of the birefringent regions between two crossed polarizers depends on phase retardation and the orientation angle of the birefringent optical axes. Based on this effect, three-dimensional (3D) multilevel memory was proposed and demonstrated for nonvolatile memory up to eight levels, in contrast to the standard two-level technology. Eight-level writing and reading are distinguishable in fused silica with a near-infrared femtosecond laser. The retention of this memory is characterized for nonvolatile applications.
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Guanghua Cheng, Qing Liu, Yishan Wang, Wei Zhao, Guofu Chen. Three-dimensional multilevel memory based on laser-polarization-dependence birefringence[J]. Chinese Optics Letters, 2006, 4(2): 02111.

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