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Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure
Emission control of colloidal quantum dots (QDs) is a cornerstone of modern high-quality lighting and display technologies. Dynamic emission control of colloidal QDs in an optoelectronic device is usually achieved by changing the optical pump intensity or injection current density. Here we propose a...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5696373/ https://www.ncbi.nlm.nih.gov/pubmed/29158507 http://dx.doi.org/10.1038/s41467-017-01870-0 |
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author | Lu, Yu-Jung Sokhoyan, Ruzan Cheng, Wen-Hui Kafaie Shirmanesh, Ghazaleh Davoyan, Artur R. Pala, Ragip A. Thyagarajan, Krishnan Atwater, Harry A. |
author_facet | Lu, Yu-Jung Sokhoyan, Ruzan Cheng, Wen-Hui Kafaie Shirmanesh, Ghazaleh Davoyan, Artur R. Pala, Ragip A. Thyagarajan, Krishnan Atwater, Harry A. |
author_sort | Lu, Yu-Jung |
collection | PubMed |
description | Emission control of colloidal quantum dots (QDs) is a cornerstone of modern high-quality lighting and display technologies. Dynamic emission control of colloidal QDs in an optoelectronic device is usually achieved by changing the optical pump intensity or injection current density. Here we propose and demonstrate a distinctly different mechanism for the temporal modulation of QD emission intensity at constant optical pumping rate. Our mechanism is based on the electrically controlled modulation of the local density of optical states (LDOS) at the position of the QDs, resulting in the modulation of the QD spontaneous emission rate, far-field emission intensity, and quantum yield. We manipulate the LDOS via field effect-induced optical permittivity modulation of an ultrathin titanium nitride (TiN) film, which is incorporated in a gated TiN/SiO(2)/Ag plasmonic heterostructure. The demonstrated electrical control of the colloidal QD emission provides a new approach for modulating intensity of light in displays and other optoelectronics. |
format | Online Article Text |
id | pubmed-5696373 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56963732017-11-22 Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure Lu, Yu-Jung Sokhoyan, Ruzan Cheng, Wen-Hui Kafaie Shirmanesh, Ghazaleh Davoyan, Artur R. Pala, Ragip A. Thyagarajan, Krishnan Atwater, Harry A. Nat Commun Article Emission control of colloidal quantum dots (QDs) is a cornerstone of modern high-quality lighting and display technologies. Dynamic emission control of colloidal QDs in an optoelectronic device is usually achieved by changing the optical pump intensity or injection current density. Here we propose and demonstrate a distinctly different mechanism for the temporal modulation of QD emission intensity at constant optical pumping rate. Our mechanism is based on the electrically controlled modulation of the local density of optical states (LDOS) at the position of the QDs, resulting in the modulation of the QD spontaneous emission rate, far-field emission intensity, and quantum yield. We manipulate the LDOS via field effect-induced optical permittivity modulation of an ultrathin titanium nitride (TiN) film, which is incorporated in a gated TiN/SiO(2)/Ag plasmonic heterostructure. The demonstrated electrical control of the colloidal QD emission provides a new approach for modulating intensity of light in displays and other optoelectronics. Nature Publishing Group UK 2017-11-21 /pmc/articles/PMC5696373/ /pubmed/29158507 http://dx.doi.org/10.1038/s41467-017-01870-0 Text en © The Author(s) 2017 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 Lu, Yu-Jung Sokhoyan, Ruzan Cheng, Wen-Hui Kafaie Shirmanesh, Ghazaleh Davoyan, Artur R. Pala, Ragip A. Thyagarajan, Krishnan Atwater, Harry A. Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure |
title | Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure |
title_full | Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure |
title_fullStr | Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure |
title_full_unstemmed | Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure |
title_short | Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure |
title_sort | dynamically controlled purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5696373/ https://www.ncbi.nlm.nih.gov/pubmed/29158507 http://dx.doi.org/10.1038/s41467-017-01870-0 |
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