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
|Numero di pagine||6|
|Rivista||Journal of Applied Physics|
|Stato di pubblicazione||Published - 2005|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Giacalone, F., Boj, P. G., Giacalone, F., Villalvilla, J. M., Díaz-García, M. A., Quintana, J. A., Segura, J. L., Martín, N., & Calzado, E. M. (2005). Concentration dependence of amplified spontaneous emission in two oligo-(p-phenylenevinylene) derivatives. Journal of Applied Physics, 97, 063522-1-063522-6.