Repulsive and attractive Casimir forces between magnetodielectric slabs |
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| Authors: | J Sun XK Hua L Gao |
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| Institution: | 1. Jiangsu Key Laboratory of Thin Films, Department of Physics, Soochow University, Suzhou 215006, China;2. Department of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215009, China;1. Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;2. Department of Information Technology and Electrical Engineering, ETH Zurich, Gloriastrasse 35, 8092 Zurich, Switzerland;1. School of Physics and Electronic Engineering, Changshu Institute of Technology, Suzhou 215000, China;2. Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore |
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| Abstract: | The Casimir force between two parallel magnetodielectric slabs is investigated by means of Casimir–Lifshitz Theory. For two magnetodielectric slabs, one is permittivity-negative, while the other is permeability-negative in the real frequency space. Numerical results show that when the separation between these two slabs is small (or large), the Casimir force is repulsive, while for the intermediate separation, the Casimir force is attractive. As a consequence, there are two equilibria with zero Casimir force, and a repulsive–attractive–repulsive transition takes place with increasing the separation. Therefore, if the separation between two interacting slabs is manipulated in the small (or large) separation region, it is possible to overcome the stiction in micromechanical and nanomechanical systems. |
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