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Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices

Recent studies have predicted a strong increase in high harmonic emission in unbiased semiconductor superlattices due to asymmetric current flow. In parallel, an external static bias has led to orders of magnitude control of high harmonics. Here, we study how this control can affect the operation of...

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Detalles Bibliográficos
Autores principales: Pereira, Mauro Fernandes, Apostolakis, Apostolos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8153262/
https://www.ncbi.nlm.nih.gov/pubmed/34068279
http://dx.doi.org/10.3390/nano11051287
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author Pereira, Mauro Fernandes
Apostolakis, Apostolos
author_facet Pereira, Mauro Fernandes
Apostolakis, Apostolos
author_sort Pereira, Mauro Fernandes
collection PubMed
description Recent studies have predicted a strong increase in high harmonic emission in unbiased semiconductor superlattices due to asymmetric current flow. In parallel, an external static bias has led to orders of magnitude control of high harmonics. Here, we study how this control can affect the operation of superlattice multipliers in a range of input frequencies and powers delivered by commercially available GHz sources. We show that the strongly nonlinear behavior can lead to a very complex scenario. Furthermore, it is natural to ask what happens when we combine both asymmetry and voltage control effects. This question is answered by the simulations presented in this study. The efficiency of high-order even harmonics is increased by the combined effects. Furthermore, the development of ‘petals’ in high-order emission is shown to be more easily achieved, opening the possibility to very interesting fundamental physics studies and more efficient devices for the GHz–THz range.
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spelling pubmed-81532622021-05-27 Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices Pereira, Mauro Fernandes Apostolakis, Apostolos Nanomaterials (Basel) Article Recent studies have predicted a strong increase in high harmonic emission in unbiased semiconductor superlattices due to asymmetric current flow. In parallel, an external static bias has led to orders of magnitude control of high harmonics. Here, we study how this control can affect the operation of superlattice multipliers in a range of input frequencies and powers delivered by commercially available GHz sources. We show that the strongly nonlinear behavior can lead to a very complex scenario. Furthermore, it is natural to ask what happens when we combine both asymmetry and voltage control effects. This question is answered by the simulations presented in this study. The efficiency of high-order even harmonics is increased by the combined effects. Furthermore, the development of ‘petals’ in high-order emission is shown to be more easily achieved, opening the possibility to very interesting fundamental physics studies and more efficient devices for the GHz–THz range. MDPI 2021-05-13 /pmc/articles/PMC8153262/ /pubmed/34068279 http://dx.doi.org/10.3390/nano11051287 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pereira, Mauro Fernandes
Apostolakis, Apostolos
Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices
title Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices
title_full Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices
title_fullStr Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices
title_full_unstemmed Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices
title_short Combined Structural and Voltage Control of Giant Nonlinearities in Semiconductor Superlattices
title_sort combined structural and voltage control of giant nonlinearities in semiconductor superlattices
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8153262/
https://www.ncbi.nlm.nih.gov/pubmed/34068279
http://dx.doi.org/10.3390/nano11051287
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