Scattering indued optical limiting in Si/SiO2 nanostructure dispersions

被引：23

作者：

King, Sharon M. ^{[1
]}

Chaure, Shweta

Doyle, James

Colli, Alan

Ferrari, Andrea C.

Blau, Werner J.

机构：

[1] Univ Dublin Trinity Coll, Sch Phys, Dublin 2, Ireland

[2] Univ Cambridge, Ctr Adv Photon & Elect, Cambridge CB2 1TN, England

来源：

OPTICS COMMUNICATIONS | 2007年 / 276卷 / 02期

关键词：

D O I：

10.1016/j.optcom.2007.04.028

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present evidence for scattering induced optical limiting in a suspension of Si/SiO2 nanostructures in an isopropanol solution. The structures were studied by open and closed aperture z-scan with 6 ns Gaussian pulses at 532 nm from a frequency doubled, Q switched Nd:YAG laser. The linear absorption of the nanostructures displayed evidence of quantum confinement. An intensity dependent scattering study illustrated the contribution to optical limiting from scattering mechanisms. We propose that optical limiting is occurring at scattering centres, most likely plasmas, which are formed through ionisation of the SiO2 outer shells. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：305 / 309

页数：5

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