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Optical Forces in Plasmonic Nanoparticle Dimers
Dept Appl Phys, Chalmers, Gothenburg, Sweden.
Dept Appl Phys, Chalmers, Gothenburg, Sweden; Dept Elect Engn, KN Toosi Univ Technol, Tehran, Iran.
Res Ctr Nanosci & Nanotechnol CIN2, Nanobiosensors & Mol Nanobiophys Grp, CSIC ICN, Bellaterra, Spain.
Örebro universitet, Akademin för naturvetenskap och teknik. Dept Appl Phys, Chalmers, Gothenburg, Sweden.ORCID-id: 0000-0002-2110-3071
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2010 (engelsk)Inngår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 114, nr 16, s. 7472-7479Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present calculations of the optical forces between two metal nanospheres forming a hybridized plasmonic chiller. We consider homo- and heterodimers and investigate different plane wave illumination configurations. The forces between the particles are calculated using kill Mie theory combined with the Maxwell stress tensor (MST) formalism, as well as by approximate methods, such as the Lorentz force (LF) approach taken in the dipole limit and calculations based on an optical potential. We show that the simplified calculation schemes can lead to serious errors in the case of strongly interacting particles and low damping. In particular, we find that equilibrium configurations, corresponding to vanishing optical forces, only are possible for homodimers illuminated in the end-fire configuration and for heterodimers, although multipolar effects and clamping radically reduce the repulsive interactions in the latter case.

sted, utgiver, år, opplag, sider
2010. Vol. 114, nr 16, s. 7472-7479
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URN: urn:nbn:se:oru:diva-12969DOI: 10.1021/jp911371rISI: 000276889300038OAI: oai:DiVA.org:oru-12969DiVA, id: diva2:383090
Tilgjengelig fra: 2011-01-04 Laget: 2011-01-03 Sist oppdatert: 2018-04-23bibliografisk kontrollert

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Pakizeh, TavakolJohansson, Peter

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