Premium
Dimer‐Based Three‐Dimensional Photonic Crystals
Author(s) -
Hosein Ian D.,
Lee Stephanie H.,
Liddell Chekesha M.
Publication year - 2010
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.201000134
Subject(s) - materials science , monoclinic crystal system , scanning electron microscope , colloidal crystal , dimer , photonic crystal , crystallography , optics , colloid , crystal structure , optoelectronics , nuclear magnetic resonance , composite material , chemical engineering , chemistry , physics , engineering
The self‐assembly of polystyrene dimer‐ and spherocylinder‐shaped colloids is achieved via controlled drying on glass and silicon substrates. 3D monoclinic colloidal crystal structures are determined from scanning electron microscopy images of sections prepared using focused ion‐beam (FIB) milling. Full photonic bandgaps between the eighth and ninth bands are found for a systematic range of colloidal dimer shapes explored with respect to the degree of constituent lobe fusion and radius ratio. The pseudogap between bands 2 and 3 for spherocylinder‐based monoclinic crystals is also probed using normal incidence reflection spectroscopy.