Optical Forces in Plasmonic Nanoparticle Dimers

Miljkovic, Vladimir,1982Chalmers tekniska högskola,Chalmers University of Technology,Dept Appl Phys, Chalmers, Gothenburg, Sweden (author)

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.

Pakizeh, Tavakol,1977Chalmers tekniska högskola,Chalmers University of Technology,Dept Appl Phys, Chalmers, Gothenburg, Sweden; Dept Elect Engn, KN Toosi Univ Technol, Tehran, Iran(Swepub:oru)vpe (author)
Sepulveda, Borja,1976CSIC-ICN Centro de investigacion en nanociencia y nanotecnologia CIN2,Res Ctr Nanosci & Nanotechnol CIN2, Nanobiosensors & Mol Nanobiophys Grp, CSIC ICN, Bellaterra, Spain(Swepub:cth)borjas (author)
Johansson, Peter,1961Örebro universitet,Akademin för naturvetenskap och teknik,Dept Appl Phys, Chalmers, Gothenburg, Sweden(Swepub:oru)pejn (author)
Käll, Mikael,1963Chalmers tekniska högskola,Chalmers University of Technology,Dept Appl Phys, Chalmers, Gothenburg, Sweden(Swepub:cth)kall (author)
Chalmers tekniska högskolaDept Appl Phys, Chalmers, Gothenburg, Sweden (creator_code:org_t)

In:Journal of Physical Chemistry C: American Chemical Society (ACS)114:16, s. 7472-74791932-74471932-7455

By the author/editor: Miljkovic, Vladi ...; Pakizeh, Tavakol ...; Sepulveda, Borja ...; Johansson, Peter ...; Käll, Mikael, 19 ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Physical Chemist ...

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