Anisotropy in the nonlinear absorption of elongated silver nanoparticles in silica, probed by femtosecond pulses

作者：Range Rojo R^*; McCarthy J; Bookey H T; Kar A K; Rodriguez Fernandez L; Cheang Wong J C; Crespo Sosa A; Lopez Suarez A; Oliver A; Rodriguez Iglesias V; Silva Pereyra H G

来源：Optics Communications, 2009, 282(9): 1909-1912.

DOI：10.1016/j.optcom.2009.01.048

• Nonlinear absorption
• Nanoparticles
• Surface-plasmon resonance

We present measurements of the anisotropy of the nonlinear absorption of a silica matrix doped with aligned spheroidal silver nanoparticles, produced by a double ion-implantation process of silver nanoparticles followed by an irradiation with Si ions. The nonlinear response was studied using the z-scan technique with fs pulses at 530 nm, which lies very close to the surface-plasmon absorption peak of the sample. The observed saturable absorption is studied for different angles of the input linear polarization of the pulses, showing a strong anisotropy, which is consistent with the fact that the nanorods are aligned.

• 出版日期2009-5-1