Abstract

We investigate numerically the optical forces between noble metal nanoparticles sustaining localized surface plasmon resonances. Our results first point out enhanced binding optical forces compared with dielectric nanoparticles and nonresonant metallic nanoparticles. We also show that under suitable illumination conditions, short-range forces tend to make the nanoparticles cluster, leading to intense and localized hot spots in the interstices. This effect corroborates recent experimental observations of an enhanced Raman signal in trapped metal sphere ensembles.

© 2007 Optical Society of America

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2006 (7)

K. Imura, H. Okamoto, M. K. Hossain, and M. Kitajima, Nano Lett. 6, 2176 (2006).
[CrossRef]

F. Svedberg and M. Käll, Faraday Discuss. 132, 35 (2006).
[CrossRef] [PubMed]

Y. Zhang, C. Gu, A. Schwartzberg, S. Chen, and J. Zhang, Phys. Rev. B 73, 165405 (2006).
[CrossRef]

S. Sburlan, L. A. Blanco, and M. Nieto-Vesperinas, Phys. Rev. B 73, 035403 (2006).
[CrossRef]

C. Girard, E. Dujardin, M. Li, and S. Mann, Phys. Rev. Lett. 97, 100801 (2006).
[CrossRef] [PubMed]

A. S. Zelenina, R. Quidant, G. Badenes, and M. Nieto-Vesperinas, Opt. Lett. 31, 2054 (2006).
[CrossRef] [PubMed]

I. Romero, J. Aizpurua, G. W. Bryant, and F. J. Garcia de Abajo, Opt. Express 14, 9988 (2006).
[CrossRef] [PubMed]

2005 (1)

P. M. Hansen, V. K. Bhatia, N. Harrit, and L. Oddershede, Nano Lett. 5, 1937 (2005).
[CrossRef] [PubMed]

2004 (2)

2002 (1)

H. Xu and M. Käll, Phys. Rev. Lett. 89, 246802 (2002).
[CrossRef] [PubMed]

2001 (1)

P. C. Chaumet and M. Nieto-Vesperinas, Phys. Rev. B 64, 035422 (2001).
[CrossRef]

2000 (1)

C. Chaumet, P. Nieto-Vesperinas, and M. Nieto-Vesperinas, Phys. Rev. B 61, 14119 (2000).
[CrossRef]

1994 (1)

Aizpurua, J.

Andrews, J.

Badenes, G.

Bhatia, V. K.

P. M. Hansen, V. K. Bhatia, N. Harrit, and L. Oddershede, Nano Lett. 5, 1937 (2005).
[CrossRef] [PubMed]

Blanco, L. A.

S. Sburlan, L. A. Blanco, and M. Nieto-Vesperinas, Phys. Rev. B 73, 035403 (2006).
[CrossRef]

Block, M.

Bryant, G. W.

Chaumet, C.

C. Chaumet, P. Nieto-Vesperinas, and M. Nieto-Vesperinas, Phys. Rev. B 61, 14119 (2000).
[CrossRef]

Chaumet, P. C.

P. C. Chaumet and M. Nieto-Vesperinas, Phys. Rev. B 64, 035422 (2001).
[CrossRef]

Chen, S.

Y. Zhang, C. Gu, A. Schwartzberg, S. Chen, and J. Zhang, Phys. Rev. B 73, 165405 (2006).
[CrossRef]

Dujardin, E.

C. Girard, E. Dujardin, M. Li, and S. Mann, Phys. Rev. Lett. 97, 100801 (2006).
[CrossRef] [PubMed]

Enoch, S.

Garcia de Abajo, F. J.

Girard, C.

C. Girard, E. Dujardin, M. Li, and S. Mann, Phys. Rev. Lett. 97, 100801 (2006).
[CrossRef] [PubMed]

Gu, C.

Y. Zhang, C. Gu, A. Schwartzberg, S. Chen, and J. Zhang, Phys. Rev. B 73, 165405 (2006).
[CrossRef]

Gupta, P.

Hansen, P. M.

P. M. Hansen, V. K. Bhatia, N. Harrit, and L. Oddershede, Nano Lett. 5, 1937 (2005).
[CrossRef] [PubMed]

Harrit, N.

P. M. Hansen, V. K. Bhatia, N. Harrit, and L. Oddershede, Nano Lett. 5, 1937 (2005).
[CrossRef] [PubMed]

Hossain, M. K.

K. Imura, H. Okamoto, M. K. Hossain, and M. Kitajima, Nano Lett. 6, 2176 (2006).
[CrossRef]

Imura, K.

K. Imura, H. Okamoto, M. K. Hossain, and M. Kitajima, Nano Lett. 6, 2176 (2006).
[CrossRef]

Käll, M.

F. Svedberg and M. Käll, Faraday Discuss. 132, 35 (2006).
[CrossRef] [PubMed]

H. Xu and M. Käll, Phys. Rev. Lett. 89, 246802 (2002).
[CrossRef] [PubMed]

F. Svedberg, L. Zhipeng, X. Li, H. Xu, and M. Käll, Nano Lett. 6, 2639 (2006).

Kitajima, M.

K. Imura, H. Okamoto, M. K. Hossain, and M. Kitajima, Nano Lett. 6, 2176 (2006).
[CrossRef]

Li, M.

C. Girard, E. Dujardin, M. Li, and S. Mann, Phys. Rev. Lett. 97, 100801 (2006).
[CrossRef] [PubMed]

Li, X.

F. Svedberg, L. Zhipeng, X. Li, H. Xu, and M. Käll, Nano Lett. 6, 2639 (2006).

Mann, S.

C. Girard, E. Dujardin, M. Li, and S. Mann, Phys. Rev. Lett. 97, 100801 (2006).
[CrossRef] [PubMed]

Mohanty, S.

Nieto-Vesperinas, M.

S. Sburlan, L. A. Blanco, and M. Nieto-Vesperinas, Phys. Rev. B 73, 035403 (2006).
[CrossRef]

A. S. Zelenina, R. Quidant, G. Badenes, and M. Nieto-Vesperinas, Opt. Lett. 31, 2054 (2006).
[CrossRef] [PubMed]

P. C. Chaumet and M. Nieto-Vesperinas, Phys. Rev. B 64, 035422 (2001).
[CrossRef]

C. Chaumet, P. Nieto-Vesperinas, and M. Nieto-Vesperinas, Phys. Rev. B 61, 14119 (2000).
[CrossRef]

Nieto-Vesperinas, P.

C. Chaumet, P. Nieto-Vesperinas, and M. Nieto-Vesperinas, Phys. Rev. B 61, 14119 (2000).
[CrossRef]

Oddershede, L.

P. M. Hansen, V. K. Bhatia, N. Harrit, and L. Oddershede, Nano Lett. 5, 1937 (2005).
[CrossRef] [PubMed]

Okamoto, H.

K. Imura, H. Okamoto, M. K. Hossain, and M. Kitajima, Nano Lett. 6, 2176 (2006).
[CrossRef]

Quidant, R.

Romero, I.

Sburlan, S.

S. Sburlan, L. A. Blanco, and M. Nieto-Vesperinas, Phys. Rev. B 73, 035403 (2006).
[CrossRef]

Schwartzberg, A.

Y. Zhang, C. Gu, A. Schwartzberg, S. Chen, and J. Zhang, Phys. Rev. B 73, 165405 (2006).
[CrossRef]

Svedberg, F.

F. Svedberg and M. Käll, Faraday Discuss. 132, 35 (2006).
[CrossRef] [PubMed]

F. Svedberg, L. Zhipeng, X. Li, H. Xu, and M. Käll, Nano Lett. 6, 2639 (2006).

Svoboda, K.

Xu, H.

H. Xu and M. Käll, Phys. Rev. Lett. 89, 246802 (2002).
[CrossRef] [PubMed]

F. Svedberg, L. Zhipeng, X. Li, H. Xu, and M. Käll, Nano Lett. 6, 2639 (2006).

Zelenina, A. S.

Zhang, J.

Y. Zhang, C. Gu, A. Schwartzberg, S. Chen, and J. Zhang, Phys. Rev. B 73, 165405 (2006).
[CrossRef]

Zhang, Y.

Y. Zhang, C. Gu, A. Schwartzberg, S. Chen, and J. Zhang, Phys. Rev. B 73, 165405 (2006).
[CrossRef]

Zhipeng, L.

F. Svedberg, L. Zhipeng, X. Li, H. Xu, and M. Käll, Nano Lett. 6, 2639 (2006).

Faraday Discuss. (1)

F. Svedberg and M. Käll, Faraday Discuss. 132, 35 (2006).
[CrossRef] [PubMed]

Nano Lett. (2)

P. M. Hansen, V. K. Bhatia, N. Harrit, and L. Oddershede, Nano Lett. 5, 1937 (2005).
[CrossRef] [PubMed]

K. Imura, H. Okamoto, M. K. Hossain, and M. Kitajima, Nano Lett. 6, 2176 (2006).
[CrossRef]

Opt. Express (3)

Opt. Lett. (2)

Phys. Rev. B (4)

Y. Zhang, C. Gu, A. Schwartzberg, S. Chen, and J. Zhang, Phys. Rev. B 73, 165405 (2006).
[CrossRef]

C. Chaumet, P. Nieto-Vesperinas, and M. Nieto-Vesperinas, Phys. Rev. B 61, 14119 (2000).
[CrossRef]

S. Sburlan, L. A. Blanco, and M. Nieto-Vesperinas, Phys. Rev. B 73, 035403 (2006).
[CrossRef]

P. C. Chaumet and M. Nieto-Vesperinas, Phys. Rev. B 64, 035422 (2001).
[CrossRef]

Phys. Rev. Lett. (2)

C. Girard, E. Dujardin, M. Li, and S. Mann, Phys. Rev. Lett. 97, 100801 (2006).
[CrossRef] [PubMed]

H. Xu and M. Käll, Phys. Rev. Lett. 89, 246802 (2002).
[CrossRef] [PubMed]

Other (1)

F. Svedberg, L. Zhipeng, X. Li, H. Xu, and M. Käll, Nano Lett. 6, 2639 (2006).

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Figures (4)

Fig. 1
Fig. 1

(A) Optical configuration. (B) Evolution of the scattering efficiency versus wavelength when gold nanospheres ( 50 nm diameter) agglomerate in dimers and trimers (gap distance δ = 25 nm ). The arrow marks the polarization of the incident electric vector.

Fig. 2
Fig. 2

Evolution of the F X component of the total force with the gap space δ [(A) and (B) for big δ, (C) and (D) for small δ] on one particle of a gold dimer at its resonance λ = 550 nm (dashed curve) and away from it λ = 1064 nm (continuous curve). The double arrow gives the incident linear polarization direction.

Fig. 3
Fig. 3

Evolution of the F X component of the total force with the gap space δ one particle of a (A) and (C) gold trimer and of a (B) and (D) gold chain both at λ = 550 nm (dashed curve) and λ = 1064 nm (continuous curve). (E) Optical potential associated to the force curves in Figs. 2A, 3A at λ = 550 nm .

Fig. 4
Fig. 4

Evolution of the local field intensity map ( λ = 550 nm ) around gold dimers (linear polarization) and trimers (circular polarization) for three different separation distances: δ = 25 nm for the first column, δ = 10 nm for the second column, and δ = 0 nm for the third column. At each position, a normalization is done with respect to the incident intensity.

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