PbS nanoparticles modified by a polymer (P-PbS) was prepared,and the transient nonlinear optical properties studied by femtosecond optical Kerr effect(OKE) spectroscopy for the first time.A very large nonlinear optica...PbS nanoparticles modified by a polymer (P-PbS) was prepared,and the transient nonlinear optical properties studied by femtosecond optical Kerr effect(OKE) spectroscopy for the first time.A very large nonlinear optical effect(X^(3)-5.6×10^-12esu) with response time comparable to the laser pulse(-165fs) was observed.Comparing with PbS nonoparticles stabilized with PVA and coated with sodium dodecyle benzene sulphonate(DBS).the optical nonlinearity of the PbS nanoparticles modified by the polymer is much larger than those of them.Thereafter.the corresponding nonlinearity mechanism was interpreted.展开更多
文摘PbS nanoparticles modified by a polymer (P-PbS) was prepared,and the transient nonlinear optical properties studied by femtosecond optical Kerr effect(OKE) spectroscopy for the first time.A very large nonlinear optical effect(X^(3)-5.6×10^-12esu) with response time comparable to the laser pulse(-165fs) was observed.Comparing with PbS nonoparticles stabilized with PVA and coated with sodium dodecyle benzene sulphonate(DBS).the optical nonlinearity of the PbS nanoparticles modified by the polymer is much larger than those of them.Thereafter.the corresponding nonlinearity mechanism was interpreted.
