Nonlinear optical properties of Au-Ag nanoplanets made by ion beam processing of bimetallic nanoclusters in silica

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:268

Article; Proceedings Paper

Cesca, T.¹  Pellegrini, G.¹  Bello, V.¹  Scian, C.¹  Mazzoldi, P.¹  Calvelli, P.²  Battaglin, G.²  Mattei, G.¹ 

[1] Univ Padua, Dept Phys, I-35131 Padua, Italy

[2] Ca Foscari Univ Venice, Dept Phys Chem, I-30123 Venice, Italy

关键词: Glass composites;    Nanoclusters;    Ion irradiation;    Nonlinear optics;   

DOI  :  10.1016/j.nimb.2010.05.095

来源: Elsevier

【 摘 要 】

The nonlinear absorption of Au-Ag nanoplanets made by Ar irradiation of bimetallic nanoclusters in silica has been experimentally investigated by means of the single beam z-scan technique. The measurements have been performed in the picoseconds regime in order to isolate the fast electronic contribution to the third-order nonlinearity. The results reveal large nonlinear absorption properties of these systems, characterized by the concomitance of saturable and reverse saturable absorption. A phenomenological expression has been developed to fit the z-scan curves and to quantitatively determine the nonlinear optical parameters. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

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