Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots

Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots

We report strong exciton migration with an efficiency of 83.3% from a violet-emitting epitaxial quantum well (QW) to an energy gradient colloidal construct of layered green- and red-emitting nanocrystal quantum dots (NQDs) at room temperature, enabled by the interplay between the exciton population...

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Main Authors: Nizamoglu, Sedat, Hernández-Martínez, Pedro Ludwig, Mutlugun, Evren, Karatay, Durmus Ugur, Demir, Hilmi Volkan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
Subjects:
DRNTU::Engineering::Electrical and electronic engineering
Online Access:https://hdl.handle.net/10356/96877
http://hdl.handle.net/10220/10878
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-968772020-03-07T14:02:38Z Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots Nizamoglu, Sedat Hernández-Martínez, Pedro Ludwig Mutlugun, Evren Karatay, Durmus Ugur Demir, Hilmi Volkan School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering We report strong exciton migration with an efficiency of 83.3% from a violet-emitting epitaxial quantum well (QW) to an energy gradient colloidal construct of layered green- and red-emitting nanocrystal quantum dots (NQDs) at room temperature, enabled by the interplay between the exciton population and the depopulation of states in the optical near field. Based on the density matrix formalization of near-field interactions, we theoretically model and demonstrate that the energy gradient significantly boosts the QW-NQDs exciton transfer rate compared to using mono-dispersed NQDs, which is in agreement with the observed experimental results. Published version 2013-07-02T02:56:24Z 2019-12-06T19:36:09Z 2013-07-02T02:56:24Z 2019-12-06T19:36:09Z 2012 2012 Journal Article Nizamoglu, S., Hernández-Martínez, P. L., Mutlugun E., Karatay, D. U., & Demir, H. V. (2012). Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots. Applied Physics Letters, 100(24), 241109-. https://hdl.handle.net/10356/96877 http://hdl.handle.net/10220/10878 10.1063/1.4724109 en Applied physics letters © 2012 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4724109]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Nizamoglu, Sedat
Hernández-Martínez, Pedro Ludwig
Mutlugun, Evren
Karatay, Durmus Ugur
Demir, Hilmi Volkan
Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
description We report strong exciton migration with an efficiency of 83.3% from a violet-emitting epitaxial quantum well (QW) to an energy gradient colloidal construct of layered green- and red-emitting nanocrystal quantum dots (NQDs) at room temperature, enabled by the interplay between the exciton population and the depopulation of states in the optical near field. Based on the density matrix formalization of near-field interactions, we theoretically model and demonstrate that the energy gradient significantly boosts the QW-NQDs exciton transfer rate compared to using mono-dispersed NQDs, which is in agreement with the observed experimental results.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Nizamoglu, Sedat
Hernández-Martínez, Pedro Ludwig
Mutlugun, Evren
Karatay, Durmus Ugur
Demir, Hilmi Volkan
format Article
author Nizamoglu, Sedat
Hernández-Martínez, Pedro Ludwig
Mutlugun, Evren
Karatay, Durmus Ugur
Demir, Hilmi Volkan
author_sort Nizamoglu, Sedat
title Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
title_short Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
title_full Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
title_fullStr Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
title_full_unstemmed Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
title_sort excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
publishDate 2013
url https://hdl.handle.net/10356/96877
http://hdl.handle.net/10220/10878
_version_ 1681042759592443904

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