Casimir expulsion of periodic configurations

TL;DR

This paper investigates the Casimir force in periodic nanosized metal cavities, revealing conditions under which noncompensated expulsion forces arise and identifying parameters that maximize these forces.

Contribution

It demonstrates that noncompensated Casimir expulsion forces can exist in periodic cavity structures when gaps are introduced, and identifies parameters that optimize these forces.

Findings

Noncompensated Casimir forces appear with gaps in periodic structures.

Maximum expulsion forces depend on cavity angles and dimensions.

Periodic configurations can be optimized for force maximization.

Abstract

There is the possibility in principle that the noncompensated Casimir force exists in open nanosized metal cavities arranged in the form of periodic structures. It is found that when trapezoid cavities are strictly periodic all the Casimir expulsion forces are completely compensated. However, when the distance of the gap is formed between the cavities, in the periodic configuration a noncompensated expulsion force proportional to the number of cavities appears. There are such effective parameters of the periodic configuration (the angles of the opening of cavities, their lengths and the relationships between them) which lead to the appearance of a maximum of expulsion forces per unit of structure length.