Gain Narrowing in Conjugated Polymer Thin Films

3 Gain Narrowing in Conjugated Polymer Thin Films 

Major advances into geometries that are potential candidates for an electrically driven lasing device with a highly directional emission were then reported independently by three different groups [37-39]. It is worthwhile to note that the submission dates of the first three papers on 

F re 10-10. (a) Semilogarithmic plot of the stimulated emission transients for various excitation pulse energies measured for LPPP on glass. The excitation pulses have a duration of 150 fs and are centered at 400 nm. The probe pulse were spectrally filtered (Ao=5OOnm, zV=10nm). (b) Emission spectra recorded for the same excitation conditions. The spectra are normalized at the purely electronic emission band (according to Ref. [18]). 

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A. Haugcneder, M. Hilmer, C. Kallinger, M. Pemer, W. Spirkl, U. Lemmcr, J. Feldmann, 1). Scherf, Mechanism of gain narrowing in conjugated polymer thin films, Appl. Phys. B 1998, 66, 389. 

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