Microstructure Effects for Casimir Forces in Chiral Metamaterials
Abstract
We examine a recent prediction for the chirality dependence of the Casimir force in chiral metamaterials by numerical computation of the forces between the exact microstructures, rather than homogeneous approximations. Although repulsion in the metamaterial regime is rigorously impossible, it is unknown whether a reduction in the attractive force can be achieved through suitable material engineering. We compute the exact force for a chiral bent-cross pattern, as well as forces for an idealized "omega"-particle medium in the dilute approximation and identify the effects of structural inhomogeneity i.e., proximity forces and anisotropy. We find that these microstructure effects dominate the force for separations where chirality was predicted to have a strong influence. At separations where the homogeneous approximation is valid, in even the most ideal circumstances the effects of chirality are less than 10(exp -4) of the total force, making them virtually undetectable in experiments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 2010
- Accession Number
- ADA531908
Entities
People
- Alejandro W. Rodriguez
- Alexander P. Mccauley
- D. A. Dalvit
- F. S. Rosa
- Jiangfeng Zhou
- John D. Joannopoulos
- Kostas Soukoulis
- M. T. Reid
- Rongkuo Zhao
- Steven G. Johnson
Organizations
- Los Alamos National Laboratory