Selective Excitation of Individual Plasmonic Hotspots at the Tips of Single Gold Nanostars

被引：168

作者：

Hrelescu, Calin ^{[1
,2
]}

Sau, Tapan K. ^{[1
,2
]}

Rogach, Andrey L. ^{[1
,2
]}

Jaeckel, Frank ^{[1
,2
]}

Laurent, Guillaume ^{[3
]}

Douillard, Ludovic ^{[3
]}

Charra, Fabrice ^{[3
]}

机构：

[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany

[2] Univ Munich, CeNS, D-80799 Munich, Germany

[3] CEA, IRAMIS, Serv Phys & Chim Surfaces & Interfaces, F-91191 Gif Sur Yvette, France

来源：

NANO LETTERS | 2011年 / 11卷 / 02期

关键词：

Nanoplasmonics; photoelectron emission microscopy; dark-field white light Rayleigh scattering; gold nanostars; ENHANCED RAMAN-SCATTERING; PHOTOEMISSION ELECTRON-MICROSCOPY; SURFACE-PLASMONS; NANOPARTICLES; RESONANCE; FIELDS; SPECTROSCOPY; NANOANTENNA; ABSORPTION; MOLECULE;

D O I：

10.1021/nl103007m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Plasmonic hotspots in single gold nanostars are located at the tips and can be excited selectively by laser light as evidenced by photo-electron emission microscopy. Selectivity is achieved through wavelength and polarization of the excitation light. Comparing photoelectron emission intensity and dark field scattering spectra of the same individual nanostars reveals differences in terms of observable plasmon resonance wavelengths and field enhancements. Differences are explained with the underlying near-and far-field processes of the two techniques.

引用

页码：402 / 407

页数：6

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