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Title: Two-photon-excited fluorescence resonance energy transfer in an aqueous system of CdTe quantum dots and Rhodamine B

Two-photon excited fluorescence resonance energy transfer (FRET) between CdTe quantum dots with different emission peaks and Rhodamine B in aqueous solution are investigated both experimentally and theoretically. The photoluminescence and lifetime are measured using a time-resolved fluorescence test system. The two-photon excited FRET efficiency is found to increase as the degree of spectral overlap of the emission spectrum of CdTe and the absorption spectrum of Rhodamine B increases, which is due to the increase of Forster radius of the sample. Moreover, FRET efficiency increases when the ratio of acceptor/donor concentration increases. The two-photon excited FRET efficiency was found to reach 40%.
Authors:
;  [1] ;  [2] ; ;  [1] ; ;  [3]
  1. Laboratory of Optical Information and Technology, School of Science, Wuhan Institute of Technology, Wuhan 430073 (China)
  2. (China)
  3. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 (China)
Publication Date:
OSTI Identifier:
22402798
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTRA; ABUNDANCE; AQUEOUS SOLUTIONS; CADMIUM TELLURIDES; EFFICIENCY; EMISSION SPECTRA; ENERGY TRANSFER; FLUORESCENCE; LIFETIME; PEAKS; PHOTOLUMINESCENCE; PHOTONS; QUANTUM DOTS; RESONANCE; TIME RESOLUTION