Abstract

We use rigorous diffraction theory to analyze the force on elliptical cylinders made from silver as a function of the elongation. We find that, when the wires are illuminated at the plasmon wavelength and placed in a highly focused Gaussian beam, they are attracted toward the optical axis if the waist of the laser is behind the wire and repelled if the waist is before the wire. Also, the force distributions of illumination wavelengths smaller and larger than the plasmon wavelength are analyzed.

© 2004 Optical Society of America

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References

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2003

2001

J. P. Kottmann and O. J. F. Martin, Appl. Phys. B 73, 299 (2001).
[CrossRef]

A. Rohrbach, E. L. Florin, and E. H. K. Stelzer, Proc. SPIE 4431, 75 (2001).
[CrossRef]

1999

1998

1997

T. Sugiura, T. Okada, Y. Inouye, O. Nakamura, and S. Kawata, Opt. Lett. 15, 1663 (1997).
[CrossRef]

1972

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

1970

A. Ashkin, Phys. Rev. Lett. 24, 156 (1970).
[CrossRef]

Arias-Gonzáles, J. R.

Ashkin, A.

A. Ashkin, Phys. Rev. Lett. 24, 156 (1970).
[CrossRef]

Born, M.

M. Born and E. Wolf, Principles of Optics (Cambridge U. Press, Cambridge, England, 1999).
[CrossRef]

Christy, R. W.

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Florin, E. L.

A. Rohrbach, E. L. Florin, and E. H. K. Stelzer, Proc. SPIE 4431, 75 (2001).
[CrossRef]

Furukawa, H.

Gu, M.

Hafner, C.

C. Hafner, Post-Modern Electromagnetics (Wiley, New York, 1999).

Inouye, Y.

T. Sugiura, T. Okada, Y. Inouye, O. Nakamura, and S. Kawata, Opt. Lett. 15, 1663 (1997).
[CrossRef]

Johnson, P. B.

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Kawata, S.

T. Sugiura, T. Okada, Y. Inouye, O. Nakamura, and S. Kawata, Opt. Lett. 15, 1663 (1997).
[CrossRef]

Ke, P. C.

Kottmann, J. P.

J. P. Kottmann and O. J. F. Martin, Appl. Phys. B 73, 299 (2001).
[CrossRef]

Lester, M.

Martin, O. J. F.

J. P. Kottmann and O. J. F. Martin, Appl. Phys. B 73, 299 (2001).
[CrossRef]

Nakamura, O.

T. Sugiura, T. Okada, Y. Inouye, O. Nakamura, and S. Kawata, Opt. Lett. 15, 1663 (1997).
[CrossRef]

Nieto-Vesperinas, M.

Okada, T.

T. Sugiura, T. Okada, Y. Inouye, O. Nakamura, and S. Kawata, Opt. Lett. 15, 1663 (1997).
[CrossRef]

Rohrbach, A.

A. Rohrbach, E. L. Florin, and E. H. K. Stelzer, Proc. SPIE 4431, 75 (2001).
[CrossRef]

Stelzer, E. H. K.

A. Rohrbach, E. L. Florin, and E. H. K. Stelzer, Proc. SPIE 4431, 75 (2001).
[CrossRef]

Sugiura, T.

T. Sugiura, T. Okada, Y. Inouye, O. Nakamura, and S. Kawata, Opt. Lett. 15, 1663 (1997).
[CrossRef]

Wolf, E.

M. Born and E. Wolf, Principles of Optics (Cambridge U. Press, Cambridge, England, 1999).
[CrossRef]

Yamaguchi, I.

Appl. Opt.

Appl. Phys. B

J. P. Kottmann and O. J. F. Martin, Appl. Phys. B 73, 299 (2001).
[CrossRef]

J. Opt. Soc. Am. A

Opt. Lett.

Phys. Rev. B

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Phys. Rev. Lett.

A. Ashkin, Phys. Rev. Lett. 24, 156 (1970).
[CrossRef]

Proc. SPIE

A. Rohrbach, E. L. Florin, and E. H. K. Stelzer, Proc. SPIE 4431, 75 (2001).
[CrossRef]

Other

M. Born and E. Wolf, Principles of Optics (Cambridge U. Press, Cambridge, England, 1999).
[CrossRef]

C. Hafner, Post-Modern Electromagnetics (Wiley, New York, 1999).

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Figures (4)

Fig. 1
Fig. 1

Normalized SCS of silver elliptical cylinders as a function of elongation.

Fig. 2
Fig. 2

Force on a silver circular cylinder (r1=r2=20 nm) illuminated with a Gaussian beam at (a) the plasmon resonance wavelength (λ=340 nm), (b) an off-resonance wavelength (λ=450 nm), and (c) a wavelength far from resonance (λ=1500 nm).

Fig. 3
Fig. 3

(a) On-axis longitudinal force and (b) transverse force evaluated parallel to the axis at x=0.44λ for an elliptical cylinder with r1=20 nm/3 and r2=20 nm3 as a function of wavelength.

Fig. 4
Fig. 4

(a) Longitudinal force in the center of the waist as a function of wavelength and (b) transverse force along the optical axis at x=0.44λ for the resonance wavelength.

Equations (1)

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F=S2ReE·nE-4E·En+μ2ReH·nH-μ4H·Hndl,

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