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9 June 2006 Spectroscopic characterisation of some dipyrromethene laser dyes bound to PMMA
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Analogues of the dipyrromethene-BF2 dye PM567 modified at the 8-position by methacryloyloxymethyl (P1MA), smethacryloyloxypentyl (P5MA), and p-methacryloyloxymethylphenyl (PAr1MA) groups have been copolymerized with methyl methacrylate (MMA), and these solid samples were studied by absorption, fluorescence, and photo-degradation spectroscopy. The absorption cross-section and stimulated emission cross-section spectra are determined. The fluorescence quantum distributions and fluorescence lifetimes are measured. High fluorescence quantum yields, ΦF ≈ 0.9, have been obtained. The photo-degradation of the dyes is studied under cw laser excitation conditions. A high photo-stability was observed.
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A. Penzkofer, T. Susdorf, M. Álvarez, W. Holzer, F. Amat-Guerri, M. Liras, A. Costela, I. García-Moreno, and R. Sastre "Spectroscopic characterisation of some dipyrromethene laser dyes bound to PMMA", Proc. SPIE 6258, ICONO 2005: Novel Photonics Materials: Physics and Optical Diagnostics of Nanostructures, 62580G (9 June 2006);

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