Second-harmonic generation from nanoscopic metal tips: Symmetry selection rules for single asymmetric nanostructures

被引：86

作者：

Neacsu, CC ^{[1
]}

Reider, GA

Raschke, MB

机构：

[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

[2] Vienna Univ Technol, Inst Photon, A-1040 Vienna, Austria

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.71.201402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Second-harmonic generation (SHG) from individual nanoscopic metal tips has been investigated. Compared to both planar interfaces, as well as spherical or ellipsoidal nanoparticles, very different polarization selection rules and SH-emission directions result. As a partially asymmetric nanostructure the tip allows for the distinction of otherwise inseparable local surface and nonlocal bulk second-harmonic polarizations. This provides opportunities for second-harmonic investigations of nanoparticles and in scattering-type near field microscopy.

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