Title :
Optical limiting mechanisms of four hexagonal prism-shaped metal cluster compounds
Author :
Chang, Cun ; Chu, Zhensheng ; Zhang, Lixin ; Yang, Liu
Author_Institution :
Coll. of Electron. Eng., Heilongjiang Univ., Harbin, China
fDate :
July 28 2010-Aug. 1 2010
Abstract :
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.
Keywords :
absorption coefficients; light scattering; metal clusters; molybdenum compounds; optical limiters; optical pumping; organic compounds; silver compounds; time resolved spectra; tungsten compounds; Mo2Ag4S8(dppy)4; Mo2Ag4S8(pph3)4; W2Ag4S8 (dppy)4; W2Ag4S8(pph3)4; hexagonal prism-shaped metal cluster compounds; ligands; nonlinear absorption; nonlinear scattering; optical limiting; picosecond laser pulses; time-resolved pump-probe experiment; wavelength 532 nm; Compounds; Delay effects; Laser beams; Laser excitation; Metals; Nonlinear optics; Probes; metal cluster; nonlinear absorption; nonlinear scatting; optical limiting;
Conference_Titel :
Laser Physics and Laser Technologies (RCSLPLT) and 2010 Academic Symposium on Optoelectronics Technology (ASOT), 2010 10th Russian-Chinese Symposium on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-5511-9
DOI :
10.1109/RCSLPLT.2010.5615377
