Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission

Abstract Understanding the enhancement of charge carrier generation and their diffusion is imperative for improving the efficiency of optoelectronic devices particularly infrared photodetectors that are less developed than their visible counterpart. Here, using gold nanorods as model plasmonic syste...

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Autores principales:	Sharmin Haq, Sadhvikas Addamane, Bijesh Kafle, Danhong Huang, Ganesh Balakrishnan, Terefe G. Habteyes
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/079dfe8e07554a84b20a7e6c5f0c5a3f
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spelling	oai:doaj.org-article:079dfe8e07554a84b20a7e6c5f0c5a3f2021-12-02T11:40:59ZActive Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission10.1038/s41598-017-00964-52045-2322https://doaj.org/article/079dfe8e07554a84b20a7e6c5f0c5a3f2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00964-5https://doaj.org/toc/2045-2322Abstract Understanding the enhancement of charge carrier generation and their diffusion is imperative for improving the efficiency of optoelectronic devices particularly infrared photodetectors that are less developed than their visible counterpart. Here, using gold nanorods as model plasmonic systems, InAs quantum dots (QDs) embedded in an InGaAs quantum well as an emitter, and GaAs as an active mediator of surface plasmons for enhancing carrier generation and photon emission, the distance dependence of energy transfer and carrier diffusion have been investigated both experimentally and theoretically. Analysis of the QD emission enhancement as a function of distance reveals a Förster radius of 3.85 ± 0.15 nm, a near-field decay length of 4.8 ± 0.1 nm and an effective carrier diffusion length of 64.0 ± 3.0 nm. Theoretical study of the temporal-evolution of the electron-hole occupation number of the excited states of the QDs indicates that the emission enhancement trend is determined by the carrier diffusion and capture rates.Sharmin HaqSadhvikas AddamaneBijesh KafleDanhong HuangGanesh BalakrishnanTerefe G. HabteyesNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sharmin Haq Sadhvikas Addamane Bijesh Kafle Danhong Huang Ganesh Balakrishnan Terefe G. Habteyes Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission
description	Abstract Understanding the enhancement of charge carrier generation and their diffusion is imperative for improving the efficiency of optoelectronic devices particularly infrared photodetectors that are less developed than their visible counterpart. Here, using gold nanorods as model plasmonic systems, InAs quantum dots (QDs) embedded in an InGaAs quantum well as an emitter, and GaAs as an active mediator of surface plasmons for enhancing carrier generation and photon emission, the distance dependence of energy transfer and carrier diffusion have been investigated both experimentally and theoretically. Analysis of the QD emission enhancement as a function of distance reveals a Förster radius of 3.85 ± 0.15 nm, a near-field decay length of 4.8 ± 0.1 nm and an effective carrier diffusion length of 64.0 ± 3.0 nm. Theoretical study of the temporal-evolution of the electron-hole occupation number of the excited states of the QDs indicates that the emission enhancement trend is determined by the carrier diffusion and capture rates.
format	article
author	Sharmin Haq Sadhvikas Addamane Bijesh Kafle Danhong Huang Ganesh Balakrishnan Terefe G. Habteyes
author_facet	Sharmin Haq Sadhvikas Addamane Bijesh Kafle Danhong Huang Ganesh Balakrishnan Terefe G. Habteyes
author_sort	Sharmin Haq
title	Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission
title_short	Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission
title_full	Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission
title_fullStr	Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission
title_full_unstemmed	Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission
title_sort	active mediation of plasmon enhanced localized exciton generation, carrier diffusion and enhanced photon emission
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/079dfe8e07554a84b20a7e6c5f0c5a3f
work_keys_str_mv	AT sharminhaq activemediationofplasmonenhancedlocalizedexcitongenerationcarrierdiffusionandenhancedphotonemission AT sadhvikasaddamane activemediationofplasmonenhancedlocalizedexcitongenerationcarrierdiffusionandenhancedphotonemission AT bijeshkafle activemediationofplasmonenhancedlocalizedexcitongenerationcarrierdiffusionandenhancedphotonemission AT danhonghuang activemediationofplasmonenhancedlocalizedexcitongenerationcarrierdiffusionandenhancedphotonemission AT ganeshbalakrishnan activemediationofplasmonenhancedlocalizedexcitongenerationcarrierdiffusionandenhancedphotonemission AT terefeghabteyes activemediationofplasmonenhancedlocalizedexcitongenerationcarrierdiffusionandenhancedphotonemission
_version_	1718395442566266880

Active Mediation of Plasmon Enhanced Localized Exciton Generation, Carrier Diffusion and Enhanced Photon Emission

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