期刊
CHEMPHYSCHEM
卷 10, 期 12, 页码 2058-2065出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200900015
关键词
conjugated polymers; gold; nanoparticles; nonlinear optics; Z-scan technique
资金
- National Nature Science Foundation of China [20531060, 10874787, 20873155]
- National Basic Research 973 Program of China
Gold nanoparticles protected by a novel pi-conjugated polymer [poly(p-phenylene ethynylene) containing pendent disulfide and bipyridine groups] are synthesized and characterized. The polymer can stabilize the gold nanoparticles effectively. The nonlinear optical properties of the gold nanoparticle colloid solutions in toluene are investigated by using the Z-scan technique at a wavelength of 532 nm and pulse width of 4 ns. The gold-nanoparticle colloid solutions show an exceptional nonlinear absorption effect, which simultaneously contains the saturated absorption resulting from third-order nonlinearity and a large reverse-saturated absorption resulting from fifth-order nonlinearity. In addition, asymmetric self-focusing refractive effects are investigated in the colloid solutions.
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