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Giant controllable gigahertz to terahertz nonlinearities in superlattices

Optical nonlinearities are of perpetual importance, notably connected with emerging new materials. However, they are difficult to exploit in the gigahertz–terahertz (GHz–THz) range at room temperature and using low excitation power. Here, we present a clear-cut theoretical and experimental demonstra...

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Autores principales: Pereira, M. F., Anfertev, V., Shevchenko, Y., Vaks, V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7524766/
https://www.ncbi.nlm.nih.gov/pubmed/32994457
http://dx.doi.org/10.1038/s41598-020-72746-5
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author Pereira, M. F.
Anfertev, V.
Shevchenko, Y.
Vaks, V.
author_facet Pereira, M. F.
Anfertev, V.
Shevchenko, Y.
Vaks, V.
author_sort Pereira, M. F.
collection PubMed
description Optical nonlinearities are of perpetual importance, notably connected with emerging new materials. However, they are difficult to exploit in the gigahertz–terahertz (GHz–THz) range at room temperature and using low excitation power. Here, we present a clear-cut theoretical and experimental demonstration of real time, low power, room temperature control of GHz–THz nonlinearities. The nonlinear susceptibility concept, successful in most materials, cannot be used here and we show in contrast, a complex interplay between applied powers, voltages and asymmetric current flow, delivering giant control and enhancement of the nonlinearities. Semiconductor superlattices are used as nonlinear sources and as mixers for heterodyne detection, unlocking their dual potential as compact, room temperature, controllable sources and detectors. The low input powers and voltages applied are within the range of compact devices, enabling the practical extension of nonlinear optics concepts to the GHz–THz range, under controlled conditions and following a predictive design tool.
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spelling pubmed-75247662020-10-01 Giant controllable gigahertz to terahertz nonlinearities in superlattices Pereira, M. F. Anfertev, V. Shevchenko, Y. Vaks, V. Sci Rep Article Optical nonlinearities are of perpetual importance, notably connected with emerging new materials. However, they are difficult to exploit in the gigahertz–terahertz (GHz–THz) range at room temperature and using low excitation power. Here, we present a clear-cut theoretical and experimental demonstration of real time, low power, room temperature control of GHz–THz nonlinearities. The nonlinear susceptibility concept, successful in most materials, cannot be used here and we show in contrast, a complex interplay between applied powers, voltages and asymmetric current flow, delivering giant control and enhancement of the nonlinearities. Semiconductor superlattices are used as nonlinear sources and as mixers for heterodyne detection, unlocking their dual potential as compact, room temperature, controllable sources and detectors. The low input powers and voltages applied are within the range of compact devices, enabling the practical extension of nonlinear optics concepts to the GHz–THz range, under controlled conditions and following a predictive design tool. Nature Publishing Group UK 2020-09-29 /pmc/articles/PMC7524766/ /pubmed/32994457 http://dx.doi.org/10.1038/s41598-020-72746-5 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Pereira, M. F.
Anfertev, V.
Shevchenko, Y.
Vaks, V.
Giant controllable gigahertz to terahertz nonlinearities in superlattices
title Giant controllable gigahertz to terahertz nonlinearities in superlattices
title_full Giant controllable gigahertz to terahertz nonlinearities in superlattices
title_fullStr Giant controllable gigahertz to terahertz nonlinearities in superlattices
title_full_unstemmed Giant controllable gigahertz to terahertz nonlinearities in superlattices
title_short Giant controllable gigahertz to terahertz nonlinearities in superlattices
title_sort giant controllable gigahertz to terahertz nonlinearities in superlattices
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7524766/
https://www.ncbi.nlm.nih.gov/pubmed/32994457
http://dx.doi.org/10.1038/s41598-020-72746-5
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