Journal
OPTICAL MATERIALS EXPRESS
Volume 5, Issue 1, Pages 169-175Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.5.000169
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Funding
- Russian Foundation for Basic Research [14-02-00851, 13-03-01111, 13-03-00422]
- Earth Sciences Section-5
- Government of Russian Federation [074-U01]
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Optical limiting properties of natural carbon nanoparticles (Shungite carbon) and fullerene aggregates in aqueous dispersions were for the first time studied and juxtaposed. For the picosecond laser pulses both dispersions exhibited comparable optical limiting property, apparently due to nonlinear absorption (mainly TPA). In the domain of the nanosecond laser pulses, nonlinear scattering NLS is thought to be main optical limiting mechanism in the dispersions under study. Shungite carbon dispersion showed stronger optical limiting (being similar to CBS) in visible and IR, which we ascribe to its structure more favorable to the thermal relaxation processes responsible for the NLS mechanism. (C) 2014 Optical Society of America.
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