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Transmittance spectra of the bottom (continuous line) and the top (dashed line) DBR, and scheme of the microcavity structure.
Normalized emission spectra of the reference film (a) and of the microcavity (b) for low pump fluences [ in (a) and in (b)] (dashed lines) and for high pump fluences [ in (a) and in (b)] (continuous lines). Inset: Normalized laser emission spectra obtained by two cavities with different cavity lengths.
Reference film (empty circles) and microcavity (full circles) emission characteristics as a function of the pump fluence incident on the polymer: (a) FWHM mode width and (b) output intensity. The solid line in (a) is obtained by numerical simulation and the straight line in (b) is a linear fit to the input-output laser characteristic. Inset: Calculated time behavior of the laser pulses for different pump fluences ( solid line and dashed line).
Time evolution of the normalized transient trasmittance changes at a probe wavelength of (circles) and best fit (solid line). Inset: on a longer time scale.
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