Robust Topological Terahertz Circuits using Semiconductors

Topological Insulator-based devices can transport electrons/photons at the surfaces of materials without any back reflections, even in the presence of obstacles. Topological properties have recently been studied using non-reciprocal materials such as gyromagnetics or using bianisotropy. However, the...

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Bibliographic Details
Published inarXiv.org
Main Authors Bahari, Babak, Tellez-Limon, Ricardo, Kanté, Boubacar
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.09.2016
Subjects
Circuit design
Cyclotron resonance
Devices
Photons
Physics - Optics
Power splitters
Semiconductors
Topological insulators
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Summary:Topological Insulator-based devices can transport electrons/photons at the surfaces of materials without any back reflections, even in the presence of obstacles. Topological properties have recently been studied using non-reciprocal materials such as gyromagnetics or using bianisotropy. However, these effects usually saturate at optical frequencies and limit our ability to scale down devices. In order to implement topological devices that we introduce in this paper for the terahertz range, we show that semiconductors can be utilized via their cyclotron resonance in combination with small magnetic fields. We propose novel terahertz operating devices such as the topological tunable power splitter and the topological circulator. This work opens new perspectives in the design of terahertz integrated devices and circuits with high functionality.
ISSN:2331-8422
DOI:10.48550/arxiv.1607.02697