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High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon

Controlling spontaneous emission at optical scale lies in the heart of ultracompact quantum photonic devices, such as on-chip single photon sources, nanolasers and nanophotonic detectors. However, achiving a large modulation of fluorescence intensity and guiding the emitted photons into low-loss nan...

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Autores principales: Hao, He, Ren, Juanjuan, Duan, Xueke, Lu, Guowei, Khoo, Iam Choon, Gong, Qihuang, Gu, Ying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6062572/
https://www.ncbi.nlm.nih.gov/pubmed/30050152
http://dx.doi.org/10.1038/s41598-018-29624-y
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author Hao, He
Ren, Juanjuan
Duan, Xueke
Lu, Guowei
Khoo, Iam Choon
Gong, Qihuang
Gu, Ying
author_facet Hao, He
Ren, Juanjuan
Duan, Xueke
Lu, Guowei
Khoo, Iam Choon
Gong, Qihuang
Gu, Ying
author_sort Hao, He
collection PubMed
description Controlling spontaneous emission at optical scale lies in the heart of ultracompact quantum photonic devices, such as on-chip single photon sources, nanolasers and nanophotonic detectors. However, achiving a large modulation of fluorescence intensity and guiding the emitted photons into low-loss nanophotonic structures remain rather challenging issue. Here, using the liquid crystal-tuned gap surface plasmon, we theoretically demonstrate both a high-contrast switching of the spontaneous emission and high-efficiency extraction of the photons with a specially-designed tunable surface plasmon nanostructures. Through varying the refractive index of liquid crystal, the local electromagnetic field of the gap surface plasmon can be greatly modulated, thereby leading to the swithching of the spontaneous emission of the emitter placed at the nanoscale gap. By optimizing the material and geometrical parameters, the total decay rate can be changed from 103γ(0) to 8750γ(0), [γ(0) is the spontaneous emission rate in vacuum] with the contrast ratio of 85. Further more, in the design also enables propagation of the emitted photons along the low-loss phase-matched nanofibers with a collection efficiency of more than 40%. The proposal provides a novel mechanism for simultaneously switching and extracting the spontaneous emitted photons in hybrid photonic nanostructures, propelling the implementation in on-chip tunable quantum devices.
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spelling pubmed-60625722018-07-31 High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon Hao, He Ren, Juanjuan Duan, Xueke Lu, Guowei Khoo, Iam Choon Gong, Qihuang Gu, Ying Sci Rep Article Controlling spontaneous emission at optical scale lies in the heart of ultracompact quantum photonic devices, such as on-chip single photon sources, nanolasers and nanophotonic detectors. However, achiving a large modulation of fluorescence intensity and guiding the emitted photons into low-loss nanophotonic structures remain rather challenging issue. Here, using the liquid crystal-tuned gap surface plasmon, we theoretically demonstrate both a high-contrast switching of the spontaneous emission and high-efficiency extraction of the photons with a specially-designed tunable surface plasmon nanostructures. Through varying the refractive index of liquid crystal, the local electromagnetic field of the gap surface plasmon can be greatly modulated, thereby leading to the swithching of the spontaneous emission of the emitter placed at the nanoscale gap. By optimizing the material and geometrical parameters, the total decay rate can be changed from 103γ(0) to 8750γ(0), [γ(0) is the spontaneous emission rate in vacuum] with the contrast ratio of 85. Further more, in the design also enables propagation of the emitted photons along the low-loss phase-matched nanofibers with a collection efficiency of more than 40%. The proposal provides a novel mechanism for simultaneously switching and extracting the spontaneous emitted photons in hybrid photonic nanostructures, propelling the implementation in on-chip tunable quantum devices. Nature Publishing Group UK 2018-07-26 /pmc/articles/PMC6062572/ /pubmed/30050152 http://dx.doi.org/10.1038/s41598-018-29624-y Text en © The Author(s) 2018 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Hao, He
Ren, Juanjuan
Duan, Xueke
Lu, Guowei
Khoo, Iam Choon
Gong, Qihuang
Gu, Ying
High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon
title High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon
title_full High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon
title_fullStr High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon
title_full_unstemmed High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon
title_short High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon
title_sort high-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6062572/
https://www.ncbi.nlm.nih.gov/pubmed/30050152
http://dx.doi.org/10.1038/s41598-018-29624-y
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