An ultrafast spectroscopy study of stimulated emission in poly(9,9-dioctylfluorene) films and microcavities

T. Virgili, D. G. Lidzey, D. D.C. Bradley, G. Cerullo, S. Stagira, S. De Silvestri

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Abstract

We report measurements of stimulated emission in poly(9,9-dioctylfluorene). We find a gain coefficient of 1.2×104 cm-1 for 100 nm-thick films at an excitation energy density of 9.9 mJ/cm2. Using ultrafast pump-probe measurements, we have studied the effect of cavity optical confinement. A strong shift of the cavity resonance due to nonlinear refraction is observed. © 1999 American Institute of Physics.
Original languageEnglish (US)
JournalApplied Physics Letters
Volume74
Issue number19
DOIs
StatePublished - May 10 1999
Externally publishedYes

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