Theta-Shaped Plasmonic Nanostructures: Bringing "Dark" Multipole Plasmon Resonances into Action via Conductive Coupling

被引：91

作者：

Habteyes, Terefe G. ^{[1
,2
,3
]}

Dhuey, Scott ^{[4
]}

Cabrini, Stefano ^{[4
]}

Schuck, P. James ^{[4
]}

Leone, Stephen R. ^{[1
,2
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 04期

关键词：

Nanostructures; plasmon; multipole; quadrupole; octupole; Fano; OPTICAL-PROPERTIES; SYMMETRY-BREAKING; NANOPARTICLES; GROWTH; ARRAYS; SIZE;

D O I：

10.1021/nl200585b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Quadrupole plasmon and (octupolar) Fano resonances are induced in lithographically fabricated theta-shaped ring rod gold nanostructures. The optical response is characterized by measuring the light scattered by individual nanostructures. When the nanorod is brought within 3 nm of the ring wall, a weak quadrupolar resonance is observed due to capacitive coupling, and when a necklike conductive bridge links the nanorod to the nanoring the optical response changes dramatically bringing the quadrupolar resonance into prominence and creating an octupolar Fano resonance. The Fano resonance is observed due to the destructive interference of the octupolar resonance with the overlapping and broadened dipolar resonance. The quadrupolar and Fano resonances are further enhanced by capacitive coupling (near-field interaction) that is favored by the theta-shaped arrangement. The interpretation of the data is supported by FDTD simulation.

引用

页码：1819 / 1825

页数：7

共 40 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] Strongly interacting plasmon nanoparticle pairs: From dipole-dipole interaction to conductively coupled regime [J].

Atay, T ;

Song, JH ;

Nurmikko, AV .

NANO LETTERS, 2004, 4 (09) :1627-1631

[3]

Bohren C F, 2004, ABSORPTION SCATTERIN

[4] Controlling the Fano interference in a plasmonic lattice [J].

Christ, A. ;

Ekinci, Y. ;

Solak, H. H. ;

Gippius, N. A. ;

Tikhodeev, S. G. ;

Martin, O. J. F. .

PHYSICAL REVIEW B, 2007, 76 (20)

[5] Optical frequency mixing at coupled gold nanoparticles [J].

Danckwerts, Matthias ;

Novotny, Lukas .

PHYSICAL REVIEW LETTERS, 2007, 98 (02)

[6] Selective colorimetric detection of polynucleotides based on the distance-dependent optical properties of gold nanoparticles [J].

Elghanian, R ;

Storhoff, JJ ;

Mucic, RC ;

Letsinger, RL ;

Mirkin, CA .

SCIENCE, 1997, 277 (5329) :1078-1081

[7] Circuit elements at optical frequencies:: Nanoinductors, nanocapacitors, and nanoresistors -: art. no. 095504 [J].

Engheta, N ;

Salandrino, A ;

Alù, A .

PHYSICAL REVIEW LETTERS, 2005, 95 (09)

[8] Direct Near-Field Optical Imaging of Higher Order Plasmonic Resonances [J].

Esteban, R. ;

Vogelgesang, R. ;

Dorfmueller, J. ;

Dmitriev, A. ;

Rockstuhl, C. ;

Etrich, C. ;

Kern, K. .

NANO LETTERS, 2008, 8 (10) :3155-3159

[9] Self-Assembled Plasmonic Nanoparticle Clusters [J].

Fan, Jonathan A. ;

Wu, Chihhui ;

Bao, Kui ;

Bao, Jiming ;

Bardhan, Rizia ;

Halas, Naomi J. ;

Manoharan, Vinothan N. ;

Nordlander, Peter ;

Shvets, Gennady ;

Capasso, Federico .

SCIENCE, 2010, 328 (5982) :1135-1138

[10] Optical properties of short range ordered arrays of nanometer gold disks prepared by colloidal lithography [J].

Hanarp, P ;

Käll, M ;

Sutherland, DS .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (24) :5768-5772

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