Optical limiting of C60, C60 charge-transfer complexes, and higher fullerenes from 532 to 750 nm

James Randy Heflin; S. Wang; Daniela Marciu; Charles Figura; R. Yordanov

doi:10.1117/12.228117

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8 December 1995 Optical limiting of C₆₀, C₆₀ charge-transfer complexes, and higher fullerenes from 532 to 750 nm

James Randy Heflin, S. Wang, Daniela Marciu, Charles Figura, R. Yordanov

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Proceedings Volume 2530, Fullerenes and Photonics II; (1995) https://doi.org/10.1117/12.228117
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The wavelength-dependence of optical limiting in the reverse saturable absorber C₆₀ has been studied in detail over a large spectral range and compared to that of two phthalocyanines. The reverse saturable absorption of C₆₀ is found to increase at wavelengths longer than the standardly measured 532 nm. The optical limiting data have been analyzed in terms of the dynamical population rate equations to obtain the excited state absorption cross-sections. The computational effort of the analysis is greatly reduced by a semi-analytic solution to the rate equations that we have developed. We have also demonstrated that the spectral window for optical limiting of fullerenes can be increased to include longer wavelengths at which C₆₀ is transparent. Both a C₆₀ charge-transfer complex and C₇₆ have been shown to exhibit strong reverse saturable absorption at long wavelengths.

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James Randy Heflin, S. Wang, Daniela Marciu, Charles Figura, and R. Yordanov "Optical limiting of C₆₀, C₆₀ charge-transfer complexes, and higher fullerenes from 532 to 750 nm", Proc. SPIE 2530, Fullerenes and Photonics II, (8 December 1995); https://doi.org/10.1117/12.228117

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