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Published on: October 19, 2015
Casimir repulsion in superparamagnetic metamaterial constructed by non-monodisperse nanoparticles
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The electromagnetic properties of interfaces in microelectromechanical systems directly determine the Casimir force between them, therefore the construction of the electromagnetic surface is particularly significant. We theoretically utilize non-monodisperse magnetic nanoparticles to construct a meta-metamaterial (MMM) surface to obtain a repulsive force, which can be adjusted by an external magnetic field. According to Lifshitz's theory, we have discovered that influence of the distribution of particle size on the Casimir force is related to the expectation of particle size, and Casimir repulsion will decrease when taking into account the anisotropy of electromagnetic parameters for MMM plate. This study provides feasible solutions to achieve Casimir repulsion using electromagnetic surfaces.
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