Plasmonic Ratchet Wheels: Switching Circular Dichroism by Arranging Chiral Nanostructures

[en] We demonstrate circular dichroism (CD) in the second harmonic generation (SHG) signal from chiral assemblies of G-shaped nanostructures made of gold. The arrangement of the G shapes is crucial since upon reordering them the SHG-CD effect disappears. Microscopy reveals SHG "hotspots" assemblies, which originate in enantiomerically sensitive plasmon modes, having the novel property of exhibiting a chiral geometry themselves in relation with the handedness of the material. These results open new frontiers in studying chirality.

Disciplines :

Physics

Author, co-author :

Valev, V. K.

Smisdom, N.

Silhanek, Alejandro ; Université de Liège - ULiège > ISLV : Enseignements facultaires des langues étrangères

De Clercq, B.

Gillijns, W.

Ameloot, M.

Moshchalkov, V. V.

Verbiest, T.

Language :

English

Title :

Plasmonic Ratchet Wheels: Switching Circular Dichroism by Arranging Chiral Nanostructures

Publication date :

2009

Journal title :

Nano Letters

ISSN :

1530-6984

eISSN :

1530-6992

Publisher :

American Chemical Society, Washington, United States - District of Columbia

Volume :

Issue :

Pages :

3945-3948

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 10 November 2011

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219

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190

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199

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