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Proceedings Paper

Optical limiting over an extended spectral region by derivatization of C60
Author(s): James Randy Heflin; Daniela Marciu; Charles Figura; S. Wang; R. Yordanov; James C. Withers
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Paper Abstract

The optical limiting performance of C60 is shown to be extended to longer wavelengths by derivatization of the fullerene. While the reverse saturable absorption behavior of C60 generally improves at wavelengths longer than 532 nm due to decreased ground state absorption and increased excited state absorption, the peak of the triplet-triplet excited state absorption at 750 nm is inaccessible as a result of the near complete transparency of C60 beyond 650 nm. Partial breaking of the spherical it-conjugation by attached substituents leads to increased ground state absorption cross-sections in the appropriate wavelength range. The peak of the triplet-triplet absorption is shifted to 700 nm in the C60 derivatives, resulting in exceptionally strong optical limiting in this spectral region.

Paper Details

Date Published: 10 October 1997
PDF: 10 pages
Proc. SPIE 3146, Nonlinear Optical Liquids and Power Limiters, (10 October 1997); doi: 10.1117/12.284160
Show Author Affiliations
James Randy Heflin, Virginia Polytechnic Institute and State Univ. (United States)
Daniela Marciu, Virginia Polytechnic Institute and State Univ. (United States)
Charles Figura, Virginia Polytechnic Institute and State Univ. (United States)
S. Wang, Virginia Polytechnic Institute and State Univ. (United States)
R. Yordanov, Virginia Polytechnic Institute and State Univ. (United States)
James C. Withers, Materials and Electrochemical Research Corp. (United States)


Published in SPIE Proceedings Vol. 3146:
Nonlinear Optical Liquids and Power Limiters
Christopher M. Lawson, Editor(s)

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