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

X. Li, Craig Bullen, J.W.M. Chon, R.A. Evans, M. Gu

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

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. (c) 2007 American Institute of Physics.
Original languageEnglish
Pages (from-to)online - approx 5-20pp
JournalApplied Physics Letters
Volume90
Issue number16
DOIs
Publication statusPublished - 2007

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