High-fluence laser photoluminescence in C60 solutions

Daniel G. McLean; Donna M. Brandelik; Mark C. Brant; Richard L. Sutherland; Paul A. Fleitz

doi:10.1117/12.173831

15 May 1994 High-fluence laser photoluminescence in C60 solutions

Daniel G. McLean, Donna M. Brandelik, Mark C. Brant, Richard L. Sutherland, Paul A. Fleitz

Proceedings Volume 2143, Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications; (1994) https://doi.org/10.1117/12.173831
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

The nonlinear absorptive properties of C₆₀ are of significant interest. In this paper we describe spectral emission measurements on C₆₀/toluene solutions and neat toluene in the fluence regime of 3 to 1500 J/cm² excited by nanosecond and picosecond pulses. Ten emission lines between 547 nm and 635 nm are observed in both toluene and C₆₀ solutions. These lines are found to correlate well with published Raman spectra of toluene. In C₆₀ solutions an additional broad double feature is observed with peaks at 692 nm and 732 nm matching the published fluorescence spectra of C₆₀. At the highest fluences a broad new feature appears at 655 nm, grows nonlinearly, and saturates in the C₆₀ solution. In the blue spectral region, at wavelengths shorter than the pump wavelength, a plethora of lines are observed in neat toluene between 340 and 520 nm and found to correlate with molecular disassociation products. No evidence for breakdown, however, is apparent in the C₆₀ solutions. Both neat toluene and C₆₀ solutions show evidence of photochemical reaction.

Citation Download Citation

Daniel G. McLean, Donna M. Brandelik, Mark C. Brant, Richard L. Sutherland, and Paul A. Fleitz "High-fluence laser photoluminescence in C60 solutions", Proc. SPIE 2143, Organic, Metallo-Organic, and Polymeric Materials for Nonlinear Optical Applications, (15 May 1994); https://doi.org/10.1117/12.173831

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