Spatial control of coherent anti-stokes emission with height-modulated gold zig-zag nanowires

被引：35

作者：

Kim, Hyunmin ^{[1
]}

Taggart, David K. ^{[1
]}

Xiang, Chengxiang ^{[1
]}

Penner, Reginald M. ^{[1
]}

Potma, Eric Olaf ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 08期

关键词：

D O I：

10.1021/nl801207a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Intrinsic coherent anti-Stokes emission is observed in lithographically patterned gold nanowires. Polarization dependent measurements reveal that the nanostructure's anti-Stokes response is polarized in the direction of the transverse surface plasmon resonance of the wire. We have used specially fabricated gold nanozigzag wires that are modulated in height between 20 and 80 nm to demonstrate tuning of the plasmon polarizability through control of wire height. Stronger anti-Stokes emission is shown to correlate with structures that support higher plasmon polarizabilily, underlining the primary role of the transverse plasmon resonance in the generation of anti-Stokes radiation from gold nanostructures. Our results also point out that a potential surf ace-enhanced coherent anti-Stokes Raman scattering (CARS) assay for detecting the vibrational response of surface-tethered molecules needs to include a mechanism for separating the molecular response from the strong intrinsic antiStokes emission of the metallic nanosubstrate.

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收藏

页码：2373 / 2377

页数：5

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