Electromagnetic field emitted by core–shell semiconductor nanowires driven by an alternating current

We consider tubular nanowires with a polygonal cross section. In this geometry, the lowest energy states are separated into two sets, one the corner and the other side-localized states. The presence of an external magnetic field transverse to the nanowire imposes an additional localization mechanism...

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Bibliographic Details
Published in:Journal of applied physics 2021-07, Vol.130 (3)
Main Authors: Torres, Miguel Urbaneja, Klausen, Kristjan Ottar, Sitek, Anna, Erlingsson, Sigurdur I., Gudmundsson, Vidar, Manolescu, Andrei
Format: Article
Language:English
Subjects:
Applied physics
Electromagnetic fields
Electromagnetism
Electron distribution
Localization
Lorentz force
Nanowires
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Summary:We consider tubular nanowires with a polygonal cross section. In this geometry, the lowest energy states are separated into two sets, one the corner and the other side-localized states. The presence of an external magnetic field transverse to the nanowire imposes an additional localization mechanism: the electrons being pushed sideways relatively to the direction of the field. This effect has important implications on the current density as it creates current loops induced by the Lorentz force. We calculate numerically the electromagnetic field radiated by hexagonal, square, and triangular nanowires. We demonstrate that because of the aforementioned localization properties, the radiated field can have a complex distribution determined by the internal geometry of the nanowire. We suggest that measuring the field in the neighborhood of the nanowire could be the basic idea of the tomography of the electron distribution inside it if a smaller receiver antenna could be placed in that zone.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0055260