Concentration dependence of amplified spontaneous emission in two oligo-(p-phenylenevinylene) derivatives

Francesco Giacalone, Pedro G. Boj, Francesco Giacalone, Joś M. Villalvilla, María A. Díaz-García, Joś A. Quintana, Joś L. Segura, Nazario Martín, Eva M. Calzado

Risultato della ricerca: Articlepeer review

21 Citazioni (Scopus)

Abstract

Amplified spontaneous emission sASEd in optically pumped polystyrene sPSd films doped with twodifferent oligo-sp-phenylenevinylened derivatives sOPVsd, with three s3-OPVd and five s5-OPVdmonomer units is reported. It is observed that there is a maximum content of oligomer s25 wt. % for3-OPV and 20 wt. % for 5-OPVd that can be introduced in the films, due to degradation sin 3-OPVdand ASE quenching sin 5-OPVd. Optimal concentrations swith minimum pump-intensity thresholdsfor the observation of ASEd of 15 wt. % and 9 wt. % are measured for the trimer and the pentamer,respectively. The concentration dependence of the ASE threshold is discussed in terms of the opticalabsorption spectra. Gain coefficients are obtained by analyzing the dependence of the ASE with thelength of the pump stripe. The results show that films based on 5-OPV appear to be more efficientand stable than those based on 3-OPV
Lingua originaleEnglish
pagine (da-a)063522-1-063522-6
Numero di pagine6
RivistaJournal of Applied Physics
Volume97
Stato di pubblicazionePublished - 2005

All Science Journal Classification (ASJC) codes

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