Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures

被引：0

作者：

Valev, Ventsislav K. ^{[1
]}

Osley, Edward J. ^{[2
,3
]}

De Clercq, Ben ^{[4
,5
]}

Silhanek, Alejandro V. ^{[6
]}

Warburton, Paul A. ^{[2
,3
]}

Aktsipetrov, Oleg A. ^{[8
]}

Ameloot, Marcel ^{[4
,5
]}

Moshchalkov, Victor V. ^{[7
]}

Verbiest, Thierry ^{[1
]}

机构：

[1] Katholieke Univ Leuven, INPAC, B-3001 Louvain, Belgium

[2] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

[3] UCL, Dept Elect & Elect Engn, London WC1E 7JE, England

[4] Univ Hasselt, B-3590 Diepenbeek, Belgium

[5] Transnat Univ Limburg, BIOMED, B-3590 Diepenbeek, Belgium

[6] Univ Liege, Dept Phys, B-4000 Sart Tilman Par Liege, Belgium

[7] Katholieke Univ Leuven, INPAC, Pulsed Fields Grp, B-3001 Louvain, Belgium

[8] Lomonosov Moscow State Univ, Moscow, Russia

来源：

METAMATERIALS VII | 2012年 / 8423卷

关键词：

Second Harmonic Generation; SHG; metamaterials; nanostructures; chirality; nanoscience; nonlinear optics; plasmonics; HYPER-RAYLEIGH-SCATTERING; METALLIC PARTICLES; GENERATION; SURFACE; SILVER; NANOPARTICLES; ENHANCEMENT; DEFECTS; PATTERN; ORIGIN;

D O I：

10.1117/12.921523

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report our latest results on second harmonic generation (SHG) microscopy from arrays of G-shaped chiral gold nanostructures. The nanostructures are arranged in unit cells composed of four Gs, each rotated at 90 degrees with respect to its neighbors. As it has already been demonstrated, for linearly polarized light, these unit cells yield a pattern of four SHG hotspots. However, upon increasing the pitch of the nanostructured arrays, extra hotspots can be observed at the edges of the unit cells. While the origin of these extra hotspots remains to be elucidated, their position indicates a relationship to coupling behavior between the unit cells.

引用

页数：8

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