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High‐Quality Photonic Crystals Infiltrated with Quantum Dots
Author(s) -
Paquet C.,
Yoshino F.,
Levina L.,
Gourevich I.,
Sargent E. H.,
Kumacheva E.
Publication year - 2006
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200500845
Subject(s) - materials science , quantum dot , colloidal crystal , colloid , scanning electron microscope , photonic crystal , stopband , infiltration (hvac) , capillary action , spectroscopy , fluorescence , nanotechnology , composite number , microscopy , composite material , optoelectronics , optics , chemical engineering , physics , resonator , quantum mechanics , engineering
We report a method for producing colloidal crystals heavily loaded with PbS quantum dots (QDs). The approach employed uses capillary forces to load the QDs in the interstitial voids of the colloid crystals and yields highly ordered structures with a high loading of QDs. The infiltration process is qualitatively monitored using confocal fluorescence microscopy and scanning electron microscopy. The optical properties of the resulting composite structure are examined using optical spectroscopy. The shift in the stopband resulting from the infiltration of the colloid crystal shows that the PbS QDs occupy nearly 100 % of the volume of the interstitial space.