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Excited State Absorption in Cubane-Like Transition Metal Clusters

Published online by Cambridge University Press:  15 February 2011

W. Ji
Affiliation:
Department of Physics, National University of Singapore, Singapore 0511.
H. J. Du
Affiliation:
Department of Physics, National University of Singapore, Singapore 0511.
S. Shi
Affiliation:
Optical Crystal Laboratory and Department of Chemical Engineering, National University of Singapore, Singapore 0511.
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Abstract

We report an investigation of excited-state absorption in cubane-like transition metal clusters. The fluence-dependent transmittances of the clusters have been measured with using 8-ns laser pulses. Time-resolved transmission measurements show that the triplet-triplet absorption occurs within a few nanoseconds. We have also developed a five-level (two singlet states, two triplet states, and one ionized state) model to simulate the excited-state absorption in these cluster compounds. The comparison between the model and the experimental measurements indicates that the population of the triplet states is created mainly by an ionization-recombination process and the triplet-triplet transitions are responsible for the observed nonlinear absorption.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

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References

[1] Tuff, L. W. and Kost, A., Nature 356, 255 (1992).Google Scholar
[2] Henari, F., Callaghan, J., Stiel, H., Blau, W., and Cardin, D. J., Chem. Phys. Lett. 199, 144 (1992).Google Scholar
[3] McLean, D. G., Sutherland, R. L., Brant, M. C., Brandelik, D. M., Fleitz, P. A., and Pottenger, T., Opt. Lett. 18, 858 (1993).Google Scholar
[4] Wei, T. H., Hagan, D. J., Sence, M. J., Van Stryland, E. W., Perry, J. W., and Coulter, D. R., Appl. Phys. B 54, 46 (1992).Google Scholar
[5] Perry, J. W., Mansour, K., R.Marder, S., Perry, K. J., Alvarez, D. Jr., and Choong, I., Opt. Lett 19, 525 (1994).Google Scholar
[6] Shi, S., Ji, W., Lang, P., and Xin, X. Q., J. Phys. Chem. 98, 3570 (1994).Google Scholar
[7] Shi, S., Ji, W., Tang, S. H., Zeng, H. C. and Xin, X. Q., J. Am. Chem. Soc. 116, 3615 (1994).Google Scholar
[8] Abakumov, G. A., Koloxsky, V. B., Polyakov, B. I., and Simonov, A. P., Chem. Phys. Lett. 182, 321 (1992).Google Scholar
[9] Abakumov, G. A., Polyakov, B. I., Simonov, A. P., Skavinskaya, T. M., and Yaroslavtsev, V. T., Opt. Spectrosc. 74, 641 (1993).Google Scholar
[10] Birks, J.B., Photophyiscs in aromatic molecules, (Wiley-Interscience 1970), p.398.Google Scholar