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Optics Letters

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  • Vol. 33, Iss. 9 — May. 1, 2008
  • pp: 1029–1031

Van der Waals versus optical interaction between metal nanoparticles

Lukas Novotny and Carsten Henkel  »View Author Affiliations


Optics Letters, Vol. 33, Issue 9, pp. 1029-1031 (2008)
http://dx.doi.org/10.1364/OL.33.001029


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Abstract

We derive closed expressions for the Casimir–Polder potential between metal nanoparticles as well as for the light-induced interaction owing to the gradient force. Within the validity of the dipole approximation, the maximum interaction energy turns out to be proportional to the plasma frequency, and it is comparable to the thermal energy at T = 300 K . On the other hand, the light-induced interaction depends linearly on the light intensity, and only for strongly focused laser beams ( 10 100 mW μ m 2 ) does it become comparable in strength to the Casimir–Polder interaction.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(350.4990) Other areas of optics : Particles
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Quantum Optics

History
Original Manuscript: February 12, 2008
Manuscript Accepted: March 25, 2008
Published: April 30, 2008

Virtual Issues
Vol. 3, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Lukas Novotny and Carsten Henkel, "Van der Waals versus optical interaction between metal nanoparticles," Opt. Lett. 33, 1029-1031 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-9-1029

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