Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 26, Issue 11, Pages 1154-1156Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2014.2317792
Keywords
Femtosecond laser; data storage; azobenzene; holographic recording; multi-dimensional storage
Funding
- National Natural Science Foundation of China [51275502]
- China Post-Doctoral Science Foundation [2012M521245, 2012M511416]
- Fundamental Research Funds for the Central Universities [KB2090090001]
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High storage capacity and recording-access rate are two critical factors that the current optical storage technology pursues. Efforts on shortening the laser wavelength, increasing the numerical aperture of objective, and increasing the optical drive speed have been made to reach this end. However, these methods have run their full course because of many existing difficulties on the physical and manufacturing aspect. People have to explore innovative ways to satisfy the requirement of both mass data and high rate. Multidimensional optical storage and holographic recording are two promising technologies to increase the capacity of memory and recording rate by orders of magnitude. We report on the fast bits recording in bisazobenzene functional polymer film by femtosecond laser holographic recording. The mechanism of the photo-induced anisotropy of the material is reviewed and discussed. The demonstration of multidimensional holographic recording is presented. Some influence factors in the holographic processing are discussed.
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