Optical limiting mechanisms of four hexagonal prism-shaped metal cluster compounds
RCSLPLT) and 2010 Academic Symposium Optoelectronics Technology（2010）
摘要
Optical limiting (OL) mechanisms of hexagonal prism-shaped metal cluster compounds W2Ag4S8 (dppy)4, Mo2Ag4S8(dppy)4, W2Ag4S8(pph3)4 and Mo2Ag4S8(pph3)4 were investigated by time-resolved pump-probe experiment with picosecond laser pulses at 532 nm. Experimental results indicate that dominant OL mechanism for W2Ag4S8 (dppy)4, Mo2Ag4S8(dppy)4 with ligands (dppy)4 is the cooperation of nonlinear absorption and nonlinear scattering. While dominant OL mechanism for W2Ag4S8(pph3)4 and Mo2Ag4S8(pph3)4 with ligands (pph3)4 is nonlinear scattering only. From the analyses of pump-probe experimental results, we can deduce that OL mechanisms for hexagonal prism-shaped metal cluster compounds are related to the ligands of hexagonal prism-shaped metal cluster compounds.
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关键词
nonlinear scatting,time-resolved pump-probe experiment,molybdenum compounds,light scattering,optical pumping,metal cluster,picosecond laser pulses,hexagonal prism-shaped metal cluster compounds,nonlinear scattering,organic compounds,tungsten compounds,w2ag4s8(pph3)4,optical limiters,wavelength 532 nm,nonlinear absorption,time resolved spectra,absorption coefficients,optical limiting,ligands,mo2ag4s8(pph3)4,w2ag4s8 (dppy)4,metal clusters,mo2ag4s8(dppy)4,silver compounds,metals,nonlinear optics
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