McKerns, Michael M. and Sun, Wenfang and Lawson, Chris M. and Gray, Gary M. (2005) Higher-order triplet interaction in energy-level modeling of excited-state absorption for an expanded porphyrin cadmium complex. Journal of the Optical Society of America B, 22 (4). pp. 852-861. ISSN 0740-3224. http://resolver.caltech.edu/CaltechAUTHORS:MCKjosab05
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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.
|Additional Information:||© 2005 Optical Society of America. Received February 20, 2004; revised manuscript received August 11, 2004; accepted October 25, 2004. The authors acknowledge support under U.S. Army Research Office grant DAAD19-99-1-0119 and National Science Foundation MultiUser Instrumentation grant DBI-0070220. The authors also acknowledge the contributions that Amy Van Engen Spivey has made to the content and editing of this manuscript.|
|Official Citation:||M. M. McKerns, W. Sun, C. M. Lawson, and G. 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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|Deposited On:||12 Dec 2008 19:46|
|Last Modified:||29 Aug 2014 17:08|
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