title: Amplified spontaneous emission in polymer films doped with a perylenediimide derivative.
abstract: The presence of amplified spontaneous emission (ASE) by optical pump in polystyrene films doped with N,N'-di(10-nonadecyl)perylene-3,4:9,10-tetracarboxylic diimide (PDI-N) in a range of PDI-N concentrations between 0.25 and 5 wt. % is reported. Gain coefficients up to 10 cm(-1), at a pump intensity of 74 kW/cm2, were obtained. The lowest thresholds (approximately 15 kW/cm2) and largest photostabilities measured at 50% (approximately 50 min, i.e., 30,000 pump pulses) were obtained for concentrations up to 1 wt. %. The observation of an increase in the ASE threshold and a decrease in the photostability for larger concentrations is attributed to the presence of aggregated species.
authors.affiliation: Departmento de Física Aplicada and Instituto Universitario de Materiales de Alicante, Universidad de Alicante, 03080-Alicante, Spain.
authors.forename: Eva M
authors.initials: EM
authors.lastname: Calzado
authors.forename: José M
authors.initials: JM
authors.lastname: Villalvilla
authors.forename: Pedro G
authors.initials: PG
authors.lastname: Boj
authors.forename: José A
authors.initials: JA
authors.lastname: Quintana
authors.forename: Rafael
authors.initials: R
authors.lastname: Gómez
authors.forename: José L
authors.initials: JL
authors.lastname: Segura
authors.forename: María A
authors.initials: MA
authors.lastname: Díaz García
mesh_terms: D007094:Imides / Q000737:chemistry*; D008027:Light; D008956:Models, Chemical; D055095:Optics and Photonics; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry*; D044367:Phase Transition; D010777:Photochemistry / Q000379:methods; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry; D013997:Time Factors
chemical_list: D007094:Imides; C521272:N,N'-di(10-nonadecyl)perylene-3,4:9,10-tetracarboxylic acid diimide; D011108:Polymers; D011137:Polystyrenes; C517085:perylenetetracarboxylic diimide; D010569:Perylene