15 October 2012 Repulsive Casimir Force using metamaterials
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We investigate conditions for Casimir Force (CF) reversal between two parallel half-space metamaterial plates separated by air or vacuum at ambient temperatures. Practically, the Casimir effect can lead to stiction in nanoscale devices, degradation and decreased performance. While material realizations of repulsive CF has been proposed for high dielectric host materials, so far the CF reversal with air/vacuum as intermediate medium remain challenging. Here, we propose a two plate design based on artificial electromagnetic materials known as metamaterials. This configuration allows a simple analytical treatment that accurately describes the large and short distance asymptotics of CF and allows extraction of important parameters such as lower and upper cutoff gap distances that define the repulsive force window. A parametric study has been performed in terms of the plate's dielectric and magnetic plasma frequencies, plate separation distance and temperature. The parametric domain for achieving CF reversal is identified. If successfully implemented the proposed design could potentially result in frictionless bio-fluid transport devices, quantum levitation and coating for ultra-clean room environment.
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Venkatesh K. Pappakrishnan, Venkatesh K. Pappakrishnan, Pattabhiraju C. Mundru, Pattabhiraju C. Mundru, Dentcho A. Genov, Dentcho A. Genov, } "Repulsive Casimir Force using metamaterials", Proc. SPIE 8455, Metamaterials: Fundamentals and Applications V, 845510 (15 October 2012); doi: 10.1117/12.929973; https://doi.org/10.1117/12.929973

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