Premium
Building Nanocrystalline Planar Defects within Self‐Assembled Photonic Crystals by Spin‐Coating
Author(s) -
Pozas R.,
Mihi A.,
Ocaña M.,
Míguez H.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200502263
Subject(s) - materials science , nanocrystalline material , dopant , photonic crystal , transmittance , coating , planar , colloidal crystal , nanocrystal , spin coating , optics , optoelectronics , colloid , doping , nanotechnology , chemical engineering , computer graphics (images) , physics , computer science , engineering
A new type of 2D defect within artificial opals is presented. Sequential deposition of a colloidal crystal by convective self‐assembly and a slab of oxide nanocrystals by spin‐coating gives rise to heterostructures (as shown in the figure). The nanocrystalline layer behaves as an optical dopant, opening transmission windows within the forbidden frequency interval of the lattice, as can be seen in the superimposed transmittance spectra.