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Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout

We utilize a homodyne detection technique to achieve a new sensitivity limit for atom-based, absolute radio-frequency electric field sensing of 5 μV cm(−1) Hz(−1/2). A Mach-Zehnder interferometer is used for the homodyne detection. With the increased sensitivity, we investigate the dominant dephasin...

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Detalles Bibliográficos
Autores principales: Kumar, Santosh, Fan, Haoquan, Kübler, Harald, Sheng, Jiteng, Shaffer, James P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5317166/
https://www.ncbi.nlm.nih.gov/pubmed/28218308
http://dx.doi.org/10.1038/srep42981
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author Kumar, Santosh
Fan, Haoquan
Kübler, Harald
Sheng, Jiteng
Shaffer, James P.
author_facet Kumar, Santosh
Fan, Haoquan
Kübler, Harald
Sheng, Jiteng
Shaffer, James P.
author_sort Kumar, Santosh
collection PubMed
description We utilize a homodyne detection technique to achieve a new sensitivity limit for atom-based, absolute radio-frequency electric field sensing of 5 μV cm(−1) Hz(−1/2). A Mach-Zehnder interferometer is used for the homodyne detection. With the increased sensitivity, we investigate the dominant dephasing mechanisms that affect the performance of the sensor. In particular, we present data on power broadening, collisional broadening and transit time broadening. Our results are compared to density matrix calculations. We show that photon shot noise in the signal readout is currently a limiting factor. We suggest that new approaches with superior readout with respect to photon shot noise are needed to increase the sensitivity further.
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spelling pubmed-53171662017-02-24 Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout Kumar, Santosh Fan, Haoquan Kübler, Harald Sheng, Jiteng Shaffer, James P. Sci Rep Article We utilize a homodyne detection technique to achieve a new sensitivity limit for atom-based, absolute radio-frequency electric field sensing of 5 μV cm(−1) Hz(−1/2). A Mach-Zehnder interferometer is used for the homodyne detection. With the increased sensitivity, we investigate the dominant dephasing mechanisms that affect the performance of the sensor. In particular, we present data on power broadening, collisional broadening and transit time broadening. Our results are compared to density matrix calculations. We show that photon shot noise in the signal readout is currently a limiting factor. We suggest that new approaches with superior readout with respect to photon shot noise are needed to increase the sensitivity further. Nature Publishing Group 2017-02-20 /pmc/articles/PMC5317166/ /pubmed/28218308 http://dx.doi.org/10.1038/srep42981 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Kumar, Santosh
Fan, Haoquan
Kübler, Harald
Sheng, Jiteng
Shaffer, James P.
Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout
title Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout
title_full Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout
title_fullStr Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout
title_full_unstemmed Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout
title_short Atom-Based Sensing of Weak Radio Frequency Electric Fields Using Homodyne Readout
title_sort atom-based sensing of weak radio frequency electric fields using homodyne readout
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5317166/
https://www.ncbi.nlm.nih.gov/pubmed/28218308
http://dx.doi.org/10.1038/srep42981
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