Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films
Colloidal quantum dots exhibit efficient photoluminescence with widely tunable bandgaps as a result of quantum confinement effects1. Such quantum dots are emerging as an appealing complement to epitaxial semiconductor laser materials, which are ubiquitous and technologically mature, but unable to co...
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sg-ntu-dr.10356-796082020-04-22T08:28:15Z Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films Joonhee, Lee Jonathan, S. Steckel Cuong, Dang Craig, Breen Seth, Coe-Sullivan Arto, Nurmikko School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics Colloidal quantum dots exhibit efficient photoluminescence with widely tunable bandgaps as a result of quantum confinement effects1. Such quantum dots are emerging as an appealing complement to epitaxial semiconductor laser materials, which are ubiquitous and technologically mature, but unable to cover the full visible spectrum (red, green and blue; RGB)2. However, the requirement for high colloidal-quantum-dot packing density, and losses due to non-radiative multiexcitonic Auger recombination, have hindered the development of lasers based on colloidal quantum dots3, 4, 5, 6, 7, 8, 9. Here, we engineer CdSe/ZnCdS core/shell colloidal quantum dots with aromatic ligands, which form densely packed films exhibiting optical gain across the visible spectrum with less than one exciton per colloidal quantum dot on average. This single-exciton gain allows the films to reach the threshold of amplified spontaneous emission at very low optical pump energy densities of 90 µJ cm–2, more than one order of magnitude better than previously reported values9, 10, 11, 12. We leverage the low-threshold gain of these nanocomposite films to produce the first colloidal-quantum-dot vertical-cavity surface-emitting lasers (CQD-VCSEL). Our results represent a significant step towards full-colour single-material lasers. Accepted version 2014-09-30T01:07:36Z 2019-12-06T13:29:13Z 2014-09-30T01:07:36Z 2019-12-06T13:29:13Z 2012 2012 Journal Article Cuong, D., Joonhee, L., Craig, B., Jonathan, S. S., Seth, C.-S., & Arto, N. (2012). Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films. Nature nanotechnology, 7, 335–339. 1748-3387 https://hdl.handle.net/10356/79608 http://hdl.handle.net/10220/23913 10.1038/nnano.2012.61 en Nature nanotechnology © Macmillan Publishers Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Nature Nanotechnology, Macmillan Publishers Ltd.. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at DOI: [www.dx.doi.org/10.1038/nnano.2012.61]. application/pdf application/pdf |
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DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics Joonhee, Lee Jonathan, S. Steckel Cuong, Dang Craig, Breen Seth, Coe-Sullivan Arto, Nurmikko Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films |
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Colloidal quantum dots exhibit efficient photoluminescence with widely tunable bandgaps as a result of quantum confinement effects1. Such quantum dots are emerging as an appealing complement to epitaxial semiconductor laser materials, which are ubiquitous and technologically mature, but unable to cover the full visible spectrum (red, green and blue; RGB)2. However, the requirement for high colloidal-quantum-dot packing density, and losses due to non-radiative multiexcitonic Auger recombination, have hindered the development of lasers based on colloidal quantum dots3, 4, 5, 6, 7, 8, 9. Here, we engineer CdSe/ZnCdS core/shell colloidal quantum dots with aromatic ligands, which form densely packed films exhibiting optical gain across the visible spectrum with less than one exciton per colloidal quantum dot on average. This single-exciton gain allows the films to reach the threshold of amplified spontaneous emission at very low optical pump energy densities of 90 µJ cm–2, more than one order of magnitude better than previously reported values9, 10, 11, 12. We leverage the low-threshold gain of these nanocomposite films to produce the first colloidal-quantum-dot vertical-cavity surface-emitting lasers (CQD-VCSEL). Our results represent a significant step towards full-colour single-material lasers. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Joonhee, Lee Jonathan, S. Steckel Cuong, Dang Craig, Breen Seth, Coe-Sullivan Arto, Nurmikko |
format |
Article |
author |
Joonhee, Lee Jonathan, S. Steckel Cuong, Dang Craig, Breen Seth, Coe-Sullivan Arto, Nurmikko |
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Joonhee, Lee |
title |
Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films |
title_short |
Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films |
title_full |
Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films |
title_fullStr |
Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films |
title_full_unstemmed |
Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films |
title_sort |
red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films |
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2014 |
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https://hdl.handle.net/10356/79608 http://hdl.handle.net/10220/23913 |
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1681058672868851712 |