Effects of phase transitions in devices actuated by the electromagnetic vacuum force

TL;DR

This paper investigates how electromagnetic vacuum forces influence phase transition-based devices, demonstrating that phase changes can enhance operational distance and energy range while avoiding stiction, with implications for nano- and micro-device design.

Contribution

It introduces a detailed finite-temperature model of vacuum forces on phase-changing materials, highlighting how phase transitions can improve device performance and stability.

Findings

Phase transitions extend operational ranges.

Vacuum forces can be harnessed to prevent stiction.

Finite-temperature effects are significant in modeling.

Abstract

We study the influence of the electromagnetic vacuum force on the behaviour of a model device based on materials, like germanium tellurides, that undergo fast and reversible metal-insulator transitions on passing from the crystalline to the amorphous phase. The calculations are performed at finite temperature and fully accounting for the behaviour of the material dielectric functions. The results show that the transition can be exploited to extend the distance and energy ranges under which the device can be operated without undergoing stiction phenomena. We discuss the approximation involved in adopting the Casimir expression in simulating nano- and micro- devices at finite temperature.