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Molecular structure of CN-PPV.
Absorption, spontaneous fluorescence (dotted line), and ASE (solid line) spectra of CN-PPV film ( thick). The fluorescence and ASE are taken at and , respectively. The pump energy for ASE is .
Optically pumped PL spectra of CN-PPV film ( thick) taken at varied . The pump energy is averagely .
Changes in peak intensity (closed, dashed line) and FWHM (open, solid line) of the SRRS (circle) and ASE (triangle) as a function of .
Dependence of SRRS peak intensities on excitation length for CN-PPV films with different thicknesses. The pump energy is .
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