Engineering the optical response of plasmonic nanoantennas

被引：385

作者：

Fischer, Holger ^{[1
]}

Martin, Olivier J. F. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol Lausanne EPFL, Nanophoton & Metrol Lab, CH-1015 Lausanne, Switzerland

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 12期

关键词：

D O I：

10.1364/OE.16.009144

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The optical properties of plasmonic dipole and bowtie nanoantennas are investigated in detail using the Green's tensor technique. The influence of the geometrical parameters (antenna length, gap dimension and bow angle) on the antenna field enhancement and spectral response is discussed. Dipole and bowtie antennas confine the field in a volume well below the diffraction limit, defined by the gap dimensions. The dipole antenna produces a stronger field enhancement than the bowtie antenna for all investigated antenna geometries. This enhancement can reach three orders of magnitude for the smallest examined gap. Whereas the dipole antenna is monomode in the considered spectral range, the bowtie antenna exhibits multiple resonances. Furthermore, the sensitivity of the antennas to index changes of the environment and of the substrate is investigated in detail for biosensing applications; the bowtie antennas show slightly higher sensitivity than the dipole antenna. (C) 2008 Optical Society of America.

引用

页码：9144 / 9154

页数：11

共 50 条

[1] Optical properties of gold nanorings -: art. no. 057401 [J].

Aizpurua, J ;

Hanarp, P ;

Sutherland, DS ;

Käll, M ;

Bryant, GW ;

de Abajo, FJG .

PHYSICAL REVIEW LETTERS, 2003, 90 (05) :4

[2] Tuning the scattering response of optical nanoantennas with nanocircuit loads [J].

Alu, Andrea ;

Engheta, Nader .

NATURE PHOTONICS, 2008, 2 (05) :307-310

[3] Enhanced localized fluorescence in plasmonic nanoantennae [J].

Bakker, Reuben M. ;

Yuan, Hsiao-Kuan ;

Liu, Zhengtong ;

Drachev, Vladimir P. ;

Kildishev, Alexander V. ;

Shalaev, Vladimir M. ;

Pedersen, Rasmus H. ;

Gresillon, Samuel ;

Boltasseva, Alexandra .

APPLIED PHYSICS LETTERS, 2008, 92 (04)

[4] Near-field excitation of nanoantenna resonance [J].

Bakker, Reuben M. ;

Boltasseva, Alexandra ;

Liu, Zhengtong ;

Pedersen, Rasmus H. ;

Gresillon, Samuel ;

Kildishev, Alexander V. ;

Drachev, Vladimir P. ;

Shalaev, Vladimir M. .

OPTICS EXPRESS, 2007, 15 (21) :13682-13688

[5]

Balanis C.A., 2007, ANTENNA THEORY ANAL

[6] Spectral dependence of single molecule fluorescence enhancement [J].

Bharadwaj, Palash ;

Novotny, Lukas .

OPTICS EXPRESS, 2007, 15 (21) :14266-14274

[7] Plasmonics - Engineering optical nanoantennas [J].

Brongersma, Mark L. .

NATURE PHOTONICS, 2008, 2 (05) :270-272

[8] Plasmonic laser antenna [J].

Cubukcu, Ertugrul ;

Kort, Eric A. ;

Crozier, Kenneth B. ;

Capasso, Federico .

APPLIED PHYSICS LETTERS, 2006, 89 (09)

[9] Spectrally coded optical data storage by metal nanoparticles [J].

Ditlbacher, H ;

Krenn, JR ;

Lamprecht, B ;

Leitner, A ;

Aussenegg, FR .

OPTICS LETTERS, 2000, 25 (08) :563-565

[10] Single quantum dot coupled to a scanning optical antenna: A tunable superemitter [J].

Farahani, JN ;

Pohl, DW ;

Eisler, HJ ;

Hecht, B .

PHYSICAL REVIEW LETTERS, 2005, 95 (01)

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