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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 22, Iss. 4 — Apr. 1, 2005
  • pp: 852–861

Higher-order triplet interaction in energy-level modeling of excited-state absorption for an expanded porphyrin cadmium complex

Michael M. McKerns, Wenfang Sun, Chris M. Lawson, and Gary M. Gray  »View Author Affiliations


JOSA B, Vol. 22, Issue 4, pp. 852-861 (2005)
http://dx.doi.org/10.1364/JOSAB.22.000852


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Abstract

Recent measurements of transmission versus fluence for a methanol-solvated asymmetric pentaazadentate porphyrin-like (APPC) cadmium complex, [(C6H4-APPC)Cd]Cl, showed the limitations of current energy-level models in predicting the transmission behavior of organic reverse saturable absorbers at fluences greater than 1 J/cm². A new model has been developed that incorporates higher-order triplet processes and accurately fits both nanosecond and picosecond transmission-versus-fluence data. This model has provided the first known determination of a higher triplet excited-state absorption cross section and lifetime for an APPC complex and also described a previously unreported feature in the transmission-versus-fluence data. The intersystem crossing rate and the previously neglected higher triplet excited-state absorption cross section are shown to govern the excited-state population dynamics of methanol-solvated [(C6H4-APPC)Cd]Cl most strongly at more-practical device energies.

© 2005 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(160.4890) Materials : Organic materials
(160.6990) Materials : Transition-metal-doped materials
(190.0190) Nonlinear optics : Nonlinear optics
(190.4400) Nonlinear optics : Nonlinear optics, materials

Citation
Michael M. McKerns, Wenfang Sun, Chris M. Lawson, and Gary M. Gray, "Higher-order triplet interaction in energy-level modeling of excited-state absorption for an expanded porphyrin cadmium complex," J. Opt. Soc. Am. B 22, 852-861 (2005)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-22-4-852

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