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Tunneling-induced Talbot effect
We investigate the reforming of a plane wave into a periodic waveform in its propagation through a structural asymmetry four-level quantum dot molecule (QDM) system that is induced by an inter-dot tunneling process and present the resulting tunneling-induced Talbot effect. The tunneling process betw...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7994822/ https://www.ncbi.nlm.nih.gov/pubmed/33767249 http://dx.doi.org/10.1038/s41598-021-86289-w |
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author | Azizi, Babak Amini Sabegh, Zahra Mahmoudi, Mohammad Rasouli, Saifollah |
author_facet | Azizi, Babak Amini Sabegh, Zahra Mahmoudi, Mohammad Rasouli, Saifollah |
author_sort | Azizi, Babak |
collection | PubMed |
description | We investigate the reforming of a plane wave into a periodic waveform in its propagation through a structural asymmetry four-level quantum dot molecule (QDM) system that is induced by an inter-dot tunneling process and present the resulting tunneling-induced Talbot effect. The tunneling process between two neighborhood dots is provided with the aid of a gate voltage. Using a periodic coupling field the response of the medium to the propagating plane probe beam becomes periodic. The needed periodic coupling field is generated with the interference of two coherent plane waves having a small angle and propagating almost parallel to the probe beam direction. In the presence of the tunneling effect of an electron between two adjacent QDs, for the probe beam propagating through the QDM system, the medium becomes transparent where the coupling fields interfere constructively. As a result, the spatial periodicity of the coupling field modulates the passing plane probe beam. We determine the minimum length of the QDM system to generate a periodic intensity profile with a visibility value equal to 1 for the probe field at the exit plane of the medium. It is also shown that by increasing the propagation length of the probe beam through the QDM medium, the profile of the maximum intensity areas becomes sharper. This feature is quantified by considering a sharpness factor for the intensity profile of the probe beam at the transverse plane. Finally, we investigate free space propagation of the induced periodic field and present the Talbot images of the tunneling-induced periodic patterns at different propagation distances for different values of the QDM medium lengths. The presented dynamically designing method of the periodic coherent intensity patterns might find applications in science and technology. For instance, in optical lithography, the need to use micro/nanofabricated physical transmission diffraction gratings, in which preparation of them is expensive and time-consuming, can be eliminated. |
format | Online Article Text |
id | pubmed-7994822 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-79948222021-03-29 Tunneling-induced Talbot effect Azizi, Babak Amini Sabegh, Zahra Mahmoudi, Mohammad Rasouli, Saifollah Sci Rep Article We investigate the reforming of a plane wave into a periodic waveform in its propagation through a structural asymmetry four-level quantum dot molecule (QDM) system that is induced by an inter-dot tunneling process and present the resulting tunneling-induced Talbot effect. The tunneling process between two neighborhood dots is provided with the aid of a gate voltage. Using a periodic coupling field the response of the medium to the propagating plane probe beam becomes periodic. The needed periodic coupling field is generated with the interference of two coherent plane waves having a small angle and propagating almost parallel to the probe beam direction. In the presence of the tunneling effect of an electron between two adjacent QDs, for the probe beam propagating through the QDM system, the medium becomes transparent where the coupling fields interfere constructively. As a result, the spatial periodicity of the coupling field modulates the passing plane probe beam. We determine the minimum length of the QDM system to generate a periodic intensity profile with a visibility value equal to 1 for the probe field at the exit plane of the medium. It is also shown that by increasing the propagation length of the probe beam through the QDM medium, the profile of the maximum intensity areas becomes sharper. This feature is quantified by considering a sharpness factor for the intensity profile of the probe beam at the transverse plane. Finally, we investigate free space propagation of the induced periodic field and present the Talbot images of the tunneling-induced periodic patterns at different propagation distances for different values of the QDM medium lengths. The presented dynamically designing method of the periodic coherent intensity patterns might find applications in science and technology. For instance, in optical lithography, the need to use micro/nanofabricated physical transmission diffraction gratings, in which preparation of them is expensive and time-consuming, can be eliminated. Nature Publishing Group UK 2021-03-25 /pmc/articles/PMC7994822/ /pubmed/33767249 http://dx.doi.org/10.1038/s41598-021-86289-w Text en © The Author(s) 2021 Open AccessThis 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 Azizi, Babak Amini Sabegh, Zahra Mahmoudi, Mohammad Rasouli, Saifollah Tunneling-induced Talbot effect |
title | Tunneling-induced Talbot effect |
title_full | Tunneling-induced Talbot effect |
title_fullStr | Tunneling-induced Talbot effect |
title_full_unstemmed | Tunneling-induced Talbot effect |
title_short | Tunneling-induced Talbot effect |
title_sort | tunneling-induced talbot effect |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7994822/ https://www.ncbi.nlm.nih.gov/pubmed/33767249 http://dx.doi.org/10.1038/s41598-021-86289-w |
work_keys_str_mv | AT azizibabak tunnelinginducedtalboteffect AT aminisabeghzahra tunnelinginducedtalboteffect AT mahmoudimohammad tunnelinginducedtalboteffect AT rasoulisaifollah tunnelinginducedtalboteffect |