Abstract
The potential of rubrene as a laser dye was investigated in deaerated solutions with a XeCl excimer laser as pump source. Laser tuning range, quantum efficiency and photostability as well as excited singlet state absorption (ESA) spectra were measured. The (S1-S2) absorption band strongly overlaps with the fluorescence spectrum and thus ESA constitutes an important loss factor in the lasing process while triplet absorption can be neglected in the wavelength region of interest. Laser performance of rubrene is superior compared to other polycyclic aromatic hydrocarbons which can be considered as model compounds of the lasing process in organic dyes.
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