Design of ideal invisibility cloak in electronic circuits

• Main Author: Meng, Lingsheng
• Other Authors: Luo Yu
• Format: Thesis-Master by Coursework
• Language: English
• Published: Nanyang Technological University 2021
• Subjects: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics; Engineering::Electrical and electronic engineering::Electronic apparatus and materials
• Online Access: https://hdl.handle.net/10356/149512
• Institution: Nanyang Technological University

Invisibility cloak is a device which can make objects invisible to outer detection. The invisibility cloak in Harry Potter and other literary works has influenced generations of young people. Recent years, especially after the concept of transforming optics became popular, the invisibility cloak has become a hot research topic and widely explored in the literature. However, experimental realization of ideal invisibility cloaks still remains a challenge. Almost all previous designs make simplifications, and hence the cloaks realized suffer from large scattering, and only some ideal designs are affected by factors such as the order or direction of the field. In this project, according to the principle of transformation optics (transformation electrostatics) and transformation-invariant approach, with reference to the design method in the electromagnetic field, an omnidirectional invisibility cloak of natural materials in the electrostatic field was designed. In the experiments of this project, by comparing the voltage of each point in various electric fields under the cases of bare background material, a point in the background grounding and adding the cloak to hide the grounding point, it was verified that this cloak has ideal omnidirectional invisibility in different orders of electrostatic fields. This article will introduce the background and design method of this omnidirectional invisibility cloak of electrostatic field and introduce how its effect is verified through experiments.