4.7 Article

Casimir-Polder force between anisotropic nanoparticles and gently curved surfaces

期刊

PHYSICAL REVIEW D
卷 92, 期 2, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.92.025028

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资金

  1. National Science Foundation [DMR-12-06323]
  2. Division Of Materials Research
  3. Direct For Mathematical & Physical Scien [1206323] Funding Source: National Science Foundation

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The Casimir-Polder interaction between an anisotropic particle and a surface is orientation dependent. We study novel orientational effects that arise due to curvature of the surface for distances much smaller than the radii of curvature by employing a derivative expansion. For nanoparticles we derive a general short distance expansion of the interaction potential in terms of their dipolar polarizabilities. Explicit results are presented for nano-spheroids made of SiO2 and gold, both at zero and at finite temperatures. The preferred orientation of the particle is strongly dependent on curvature, temperature, as well as material properties.

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