Giant nonlinear optical response application for nanoporous titanium dioxide photocatalytic activity monitoring

被引：7

作者：

Gayvoronsky, V ^{[1
]}

Timoshenko, V ^{[1
]}

Brodyn, M ^{[1
]}

Galas, A ^{[1
]}

Nepijko, SA ^{[1
]}

Dittrich, T ^{[1
]}

Koch, F ^{[1
]}

Petrik, L ^{[1
]}

Smirnova, N ^{[1
]}

Eremenko, A ^{[1
]}

Klimenkov, M ^{[1
]}

机构：

[1] NASU, Inst Phys, UA-03028 Kiev, Ukraine

来源：

Physica Status Solidi C - Conferences and Critical Reviews, Vol 2, No 9 | 2005年 / 2卷 / 09期

关键词：

D O I：

10.1002/pssc.200461150

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Giant nonlinear optical response has been observed for nanoparticle Tio(2) (anatase modification) layers within sub-gap photon energy excitation in picosecond range. The obtained effective cubic optical nonlinearity value chi(3)(eff)(10-5) esu is six orders of magnitude higher than the bulk response in transparency range. The effect can be explained with resonant excitation of oxygen vacancies and related defect states, which also act as photocatalytic active centers at the nanoparticle surface. The magnitude of the nonlinear optical response correlates with the photocatalytic activity and depends on the samples preparation conditions. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：3303 / 3307

页数：5

共 12 条

[1] NONLINEAR REFRACTIVE-INDEX OF OPTICAL-CRYSTALS [J].