Two-photon energy transfer enhanced three-dimensional optical memory in quantum-dot and azo-dye doped polymers

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Title: Two-photon energy transfer enhanced three-dimensional optical memory in quantum-dot and azo-dye doped polymers
Author(s): Li, Xiangping; Chon, James W. M.; Evans, Richard A.; Gu, Min
Abstract: A three-dimensional bit-by-bit optical memory system in quantum-dot and azo-dye doped polymers is demonstrated in this paper. It is shown that two-photon absorption can be used to excite resonance energy transfer from luminescent CdS quantum dots to azo-dye molecules. As a result, the isomerization of azo-dye molecules leads to a pronounced refractive index change. This two-photon-excited energy transfer process in the quantum-dot and azo-dye polymer not only allows for high efficient multilayer information recording into the volume of thick samples but also offers a refractive index window for readout.
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. 92, no. 6 (2008), Article no. 063309
Publication year: 2008
Keyword(s): Cadmium compounds; II-VI semiconductors; Isomerisation; Optical polymers; Optical storage; Refractive index; Semiconductor quantum dots; Two-photon spectra
Publisher: American Institute of Physics
ISSN: 0003-6951
Publisher URL: http://dx.doi.org/10.1063/1.2857497
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