Optical limiting properties of a zinc porphyrin polymer and its dimer and monomer model compounds

F. M. Qureshi, S. J. Martin, X. Long, D. D C Bradley, F. Z. Henari, W. J. Blau, E. C. Smith, C. H. Wang, A. K. Kar, H. L. Anderson

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Abstract

We report on the strong decrease in laser light transmission with increasing excitation intensity observed in thin films of a zinc porphyrin polymer and its dimer and monomer model compounds. Nonlinear transmission measurements performed at 532 nm using 500 ps laser pulses show decreases of 40%, 60% and 65% at input fluences of 0.01 J/cm2 for the monomer, dimer and polymer thin films, respectively. Its application as an optical limiting device for the protection of the eyes and optical sensors from high-fluence laser pulses is assessed. Additional pump-probe measurements performed at 595 nm using 0.8 ps excitation allow us to discuss the strong response in terms of a six-level model of the electronic structure.

Original languageEnglish
Pages (from-to)87-94
Number of pages8
JournalChemical Physics
Volume231
Issue number1
Publication statusPublished - 15 May 1998

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    Qureshi, F. M., Martin, S. J., Long, X., Bradley, D. D. C., Henari, F. Z., Blau, W. J., Smith, E. C., Wang, C. H., Kar, A. K., & Anderson, H. L. (1998). Optical limiting properties of a zinc porphyrin polymer and its dimer and monomer model compounds. Chemical Physics, 231(1), 87-94.