Reverse saturable absorption and anti-Stokes fluorescence in mesoionic compounds pumped at 532 nm.
作者： Nikifor Rakov , Cid B. de Araújo , Gerd B. Rocha , Alfredo M. Simas , Petrônio A. F. Athayde-Filho
DOI: 10.1364/AO.40.001389
关键词:
摘要: Reverse saturable absorption and fluorescence in liquid solutions of mesoionic compounds are reported. Intensity-dependent transmittance anti-Stokes were observed when the samples excited with radiation at 532 nm. The results attributed to excited-state absorption, process is understood based on quantum-chemistry calculations that allow energy levels correspond relevant transitions be located. A phenomenological description nonlinear beam propagation inside presented, coefficient as well saturation intensity determined.
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