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Comparison of experimental and theoretical excited-state spectra for rhodamine 6G

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1 Author(s)
P. Hammond ; Lawrence Livemore Lab., Livemore, CA, USA

The stimulated emission cross section (σe) and the excited-state absorption cross section ( \sigma * ) for this dye are resolved across the fluorescence and the lowest energy ground-state absorption bands. The absorption is weak ( \sim0.4 \times 10^{16} cm2), particularly at the longer wavelengths [Fig. 3(c)]. Lasing properties are predicted from Fig. 4(b), which shows a plot of the (σe) curve displaced with respect to the S1state as the zero-energy level of reference, on top of the long-axis polarized ground-state absorption band. Spectral assignments are proposed in terms of symmetry arguments based on this observation.

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IEEE Journal of Quantum Electronics  (Volume:16 ,  Issue: 11 )