Two-photon-induced three-dimensional optical data storage in CdS quantum-dot doped photopolymer

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Title: Two-photon-induced three-dimensional optical data storage in CdS quantum-dot doped photopolymer
Author(s): Li, Xiangping; Bullen, Craig R.; Chon, James W. M.; Evans, Richard A.; Gu, Min
Abstract: The authors demonstrate three-dimensional erasable bit optical data storage in a quantum-dot doped photopolymer under two-photon excitation by a near-infrared femtosecond pulsed laser beam. It is shown that the photorefractive polymer consisting of poly(vinyl carbazole), ethyl carbazole, 4-(diethylaminobenzylidene)-malononitrile, and CdS quantum dots exhibits the changes not only in refractive index but also in fluorescence. Such a photosensitivity provides a multimode readout mechanism. In particular, the use of S rich surface quantum dots not only allows the two-photon-induced bit optical data storage with greater contrast but also expands the margin between permanent and erasable recording thresholds.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
Source: Applied Physics Letters, Vol. 90, no. 16 (2007)
Publication year: 2007
Publisher: American Institute of Physics
ISSN: 0003-6951
Publisher URL: http://dx.doi.org/10.1063/1.2724902
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