title: Amplified spontaneous emission from opal photonic crystals engineered with structural defects.
abstract: In this work, we report on the optical properties and amplified spontaneous emissions (ASE) of polystyrene opals engineered with planar structural defects containing a conjugated polymer emitter. Defects in opals give rise to allowed states inside the photonic stop band, which are probed by transmittance and reflectance spectroscopy. The emission spectrum of the polymer embedded in the defect layer is strongly modified and fingerprints of defect states located inside the stop band are recognized. Amplified spontaneous emission for these engineered photonic crystals is clearly observed.
authors.affiliation: Università degli Studi di Genova, Dipartimento di Chimica e Chimica Industriale, Via Dodecaneso 31, 16146 Genova, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Di Stasio
authors.forename: Luca
authors.initials: L
authors.lastname: Berti
authors.forename: Martin
authors.initials: M
authors.lastname: Burger
authors.forename: Franco
authors.initials: F
authors.lastname: Marabelli
authors.forename: Samuele
authors.initials: S
authors.lastname: Gardin
authors.forename: Tiziano
authors.initials: T
authors.lastname: Dainese
authors.forename: Raffaella
authors.initials: R
authors.lastname: Signorini
authors.forename: Renato
authors.initials: R
authors.lastname: Bozio
authors.forename: Davide
authors.initials: D
authors.lastname: Comoretto