Calculations of the Casimir Force for Multi-layer Systems: from Isotropic Materials to Topological Insulators

Zancanaro, Elena (2024) Calculations of the Casimir Force for Multi-layer Systems: from Isotropic Materials to Topological Insulators. Bachelor's Thesis, Physics.

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Abstract

The Casimir force arises from boundary-dependent modifications of the zero-point energy due to fluctuations in the electromagnetic field. This force, calculated between two bodies with known optical properties, typically manifests as an attractive interaction. However, theoretical predictions suggest that creating a repulsive Casimir force is possible by modifying boundary conditions. This thesis explores various approaches to achieving a repulsive Casimir force, particularly in using three-dimensional topological insulators, a novel class of materials with unique electronic and optical properties. The research reveals that variations in the thickness of multilayer systems meaningfully impact the Casimir force, with thinner layers exhibiting more pronounced effects. Introducing surface conductivity alters the topological force contrast (TFC), and larger theta values lead to more substantial changes. Complex interdependencies are observed in systems with multiple layers and varying thicknesses, with certain configurations enhancing the reduction factor of the Casimir force. Simplified toy models effectively predict general trends, although real materials reveal additional complexities that need consideration. These insights guide the design of nanoscale devices by strategically manipulating material properties and layer thicknesses to control the Casimir force.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Palasantzas, G.
Degree programme:	Physics
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	09 Jul 2024 11:49
Last Modified:	09 Jul 2024 11:49
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/33142

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