Terahertz applications of non-simply-connected and helical nanostructures

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

NATO Science for Peace and Security Series B: Physics and Biophysics

First Page

201

Last Page

214

Publication Date

1-1-2019

Abstract

We outline a range of proposals on using non-simply-connected and helical nanostructures for terahertz device implementations. We show that an Aharonov-Bohm quantum ring system and a double-gated quantum ring system both permit control over the polarization properties of the associated terahertz radiation. In addition, we review the superlattice properties of a nanohelix in external electric fields, which reveals negative differential conductance and photogalvanic effects. We present several schemes utilizing carbon nanotubes, including population inversion proposals for both quasi-metallic nanotubes (via generation of optically active hot electrons by an electric field), and metallic nanotubes (by optical excitation across a magnetic field-induced band gap). © Springer Nature B.V. 2019.

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Digitial Object Identifier (DOI)

10.1007/978-94-024-1687-9_11

Disciplines

Physics

Keywords

Nanoelectronics; Carbon nanotubes; Submillimeter waves; Graphene

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