Author/Authors :
Stagira، نويسنده , , S. and Nisoli، نويسنده , , Michele M. and Cerullo، نويسنده , , G. and Zavelani–Rossi، نويسنده , , M. and De Silvestri، نويسنده , , S. and Lanzani، نويسنده , , G. and Graupner، نويسنده , , W. and Leising، نويسنده , , G.، نويسنده ,
Abstract :
We show that gain relaxation dynamics in thin films of methyl-substituted poly-(para-phenylene)-type ladder polymer, investigated by femtosecond pump–probe spectroscopy under high excitation fluence, is affected by amplified spontaneous emission (ASE), which provides for an efficient excited state population depletion mechanism. The ASE influence on the photoluminescence spectral narrowing is also investigated. A general model which accounts for both excited state population dynamics and photoluminescence spectral evolution is presented.
