Engineering Casimir interactions with epsilon-near-zero materials

In this paper, we theoretically demonstrate the tunability of Casimir force both in sign and magnitude between parallel plates coated with dispersive materials. We show that force, existing uncharged plates, can be tuned by carefully choosing value plasma frequency (i.e., epsilon-near-zero frequency) coating neighborhood resonance cavity. The layer enables a continuous variation four limiting values when is placed on each plate. explore consequences such pairs electric magnetic conductors low high impedance surfaces) are used as substrates either side, showing results changes leading to stable unstable conditions, which could find interesting potential applications nanomechanics, including nanoparticle tweezing.