title: Engineering a light-emitting planar defect within three-dimensional photonic crystals.
abstract: Sandwich structures, constructed from a planar defect of rhodamine-B (RhB)-doped titania (TiO2) and two photonic crystals, were synthesized via the self-assembly method combined with spin-coating. The modification of the spontaneous emission of RhB molecules in such structures was investigated experimentally. The spontaneous emission of RhB-doped TiO2film with photonic crystals was reduced by a factor of 5.5 over a large bandwidth of 13% of the first-order Bragg diffraction frequency when compared with that of RhB-doped TiO2film without photonic crystals. The angular dependence of the modification and the photoluminescence lifetime of RhB molecules demonstrate that the strong and wide suppression of the spontaneous emission of the RhB molecules is due to the presence of the photonic band gap.
authors.affiliation: College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, People's Republic of China; Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, People's Republic of China.
authors.forename: Guiqiang
authors.initials: G
authors.lastname: Liu
authors.affiliation: College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, People's Republic of China; Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Chen
authors.affiliation: College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, People's Republic of China; Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, People's Republic of China.
authors.forename: Zhiqing
authors.initials: Z
authors.lastname: Ye
keywords: photoluminescence; photonic crystals; planar defect; self-assembly