Four-photon absorption cross section in potassium bromide at 532 nm
1987; American Physical Society; Volume: 36; Issue: 5 Linguagem: Inglês
10.1103/physrevb.36.2831
ISSN1095-3795
AutoresX. A. Shen, Scott C. Jones, P. Bräunlich, Paul J. Kelly,
Tópico(s)Spectroscopy and Quantum Chemical Studies
ResumoWe exploit recombination luminescence of self-trapped excitons for the measurement of the four-photon absorption cross section in KBr at 532 nm. The value is found to be ${\ensuremath{\sigma}}^{(4)}$=(2\ifmmode\pm\else\textpm\fi{}1)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}112}$ ${\mathrm{cm}}^{8}$ ${\mathrm{sec}}^{3}$. The validity of this method is verified by comparison with a four-photon absorption model describing the interaction process.
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