Repulsion of polarized particles from two-dimensional materials

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Abstract

Repulsion of nanoparticles, molecules, and atoms from surfaces can have important applications in nanomechanical devices, microfluidics, optical manipulation, and atom optics. Here, through the solution of a classical scattering problem, we show that a dipole source oscillating at a frequency ω can experience a robust and strong repulsive force when its near-field interacts with a two-dimensional material. As an example, the case of graphene is considered, showing that a broad bandwidth of repulsion can be obtained at frequencies for which propagation of plasmon modes is allowed 0< ω<(5/3)μc, where μc is the chemical potential tunable electrically or by chemical doping.

Original languageEnglish
Article number205401
JournalPhysical Review B
Volume97
Issue number20
DOIs
Publication statusPublished - 1 May 2018

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