Open AccessEnergy transfer in porous-silicon/laser-dye composite evidenced by polarization memory of photoluminescence
Author(s) -
A. Chouket,
Habib Elhouichet,
M. Oueslati,
H. Koyama,
Bernard Gelloz,
Nobuyoshi Koshida
Publication year - 2007
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.2814051
Subject(s) - photoluminescence , porous silicon , materials science , rhodamine b , nanocomposite , fourier transform infrared spectroscopy , porosity , photoluminescence excitation , polarization (electrochemistry) , spectroscopy , rhodamine , chemical engineering , silicon , porous medium , optoelectronics , nanotechnology , composite material , fluorescence , chemistry , optics , photocatalysis , organic chemistry , physics , quantum mechanics , engineering , catalysis
The optical properties of nanocomposites are studied for rhodamine B RhB dye molecules embedded in nanoscale porous silicon PS and porous silica P-silica. The samples are prepared by simple immersion of porous matrix substrates in RhB solutions. Fourier transform infrared spectroscopy suggests that RhB molecules fully penetrate into the porous matrix. Efficient photoluminescence has been observed in all experimental nanocomposites. The measurement of the polarization memory PM effect provides a clear evidence for the presence of an excitation energy transfer from PS to RhB molecules, in contrast to the PM behavior in RhB /P-silica composite. © 2007 American Institute of Physics. DOI: 10.1063/1.2814051
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