Repulsive Casimir forces with finite-thickness slabs
- Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
- Institute of Electronic Structure and Laser, FORTH, Department of Materials Science and Technology, University of Crete, Heraklion, G-71110 Crete (Greece)
We use the extended Lifshitz theory to study the behaviors of the Casimir forces between finite-thickness effective medium slabs. We first study the interaction between a semi-infinite Drude metal and a finite-thickness magnetic slab with or without substrate. For no substrate, the large distance d dependence of the force is repulsive and goes as 1/d{sup 5}; for the Drude metal substrate, a stable equilibrium point appears at an intermediate distance that can be tuned by the thickness of the slab. We then study the interaction between two identical chiral metamaterial slabs, with and without substrate. For no substrate, the finite thickness of the slabs D does not significantly influence the repulsive character of the force at short distances, while the attractive character at large distances becomes weaker and behaves as 1/d{sup 6}; for the Drude metal substrate, the finite thickness of the slabs D does not influence the repulsive force too much at short distances until D=0.05{lambda}{sub 0}.
- OSTI ID:
- 21538123
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 7; Other Information: DOI: 10.1103/PhysRevB.83.075108; (c) 2011 American Institute of Physics; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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