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Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems

We address optical amplification properties of quantum nanoparticles of the cadmium selenide/cadmium sulfide (CdSe/CdS) material system with different dimensionality of spatial confinement. CdSe/CdS core/shell quantum dots (QDs), core/shell quantum rods (QRs) and 5 monolayer thick core/crown nanopla...

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Autores principales: Chhantyal, Parva, Naskar, Suraj, Birr, Tobias, Fischer, Tim, Lübkemann, Franziska, Chichkov, Boris N., Dorfs, Dirk, Bigall, Nadja C., Reinhardt, Carsten
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5834608/
https://www.ncbi.nlm.nih.gov/pubmed/29500408
http://dx.doi.org/10.1038/s41598-018-22287-9
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author Chhantyal, Parva
Naskar, Suraj
Birr, Tobias
Fischer, Tim
Lübkemann, Franziska
Chichkov, Boris N.
Dorfs, Dirk
Bigall, Nadja C.
Reinhardt, Carsten
author_facet Chhantyal, Parva
Naskar, Suraj
Birr, Tobias
Fischer, Tim
Lübkemann, Franziska
Chichkov, Boris N.
Dorfs, Dirk
Bigall, Nadja C.
Reinhardt, Carsten
author_sort Chhantyal, Parva
collection PubMed
description We address optical amplification properties of quantum nanoparticles of the cadmium selenide/cadmium sulfide (CdSe/CdS) material system with different dimensionality of spatial confinement. CdSe/CdS core/shell quantum dots (QDs), core/shell quantum rods (QRs) and 5 monolayer thick core/crown nanoplatelets (NPLs) at ambient temperature are considered, exhibiting 0D, 1D and 2D spatial confinement dimensionality of the electronic system, respectively. Continuous films of all these nanoparticles are synthesised, and amplified spontaneous emission (ASE) spectra are measured under femtosecond pumping at wavelengths of 400 nm and 800 nm, respectively. The lowest threshold is found for NPLs and the highest for QDs, demonstrating the influence of the rod-like and plate-like CdS structures. To emphasize this effect, ASE is demonstrated also in CdSe/CdS QRs and NPLs under nanosecond pumping at 355 nm in the same material films. The amplification has been achieved without use of any feedback structure, emphazising the efficiency of the antenna effect. The pumping threshold fluences for NPLs and QRs are observed to be similar, but no ASE is observed in QDs up to the damage threshold of the nanoparticle layers. The length variation investigation with nanosecond pumping resulted in the gain coefficients of 29 cm(−1) and 37 cm(−1) for QRs and NPLs, respectively.
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spelling pubmed-58346082018-03-05 Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems Chhantyal, Parva Naskar, Suraj Birr, Tobias Fischer, Tim Lübkemann, Franziska Chichkov, Boris N. Dorfs, Dirk Bigall, Nadja C. Reinhardt, Carsten Sci Rep Article We address optical amplification properties of quantum nanoparticles of the cadmium selenide/cadmium sulfide (CdSe/CdS) material system with different dimensionality of spatial confinement. CdSe/CdS core/shell quantum dots (QDs), core/shell quantum rods (QRs) and 5 monolayer thick core/crown nanoplatelets (NPLs) at ambient temperature are considered, exhibiting 0D, 1D and 2D spatial confinement dimensionality of the electronic system, respectively. Continuous films of all these nanoparticles are synthesised, and amplified spontaneous emission (ASE) spectra are measured under femtosecond pumping at wavelengths of 400 nm and 800 nm, respectively. The lowest threshold is found for NPLs and the highest for QDs, demonstrating the influence of the rod-like and plate-like CdS structures. To emphasize this effect, ASE is demonstrated also in CdSe/CdS QRs and NPLs under nanosecond pumping at 355 nm in the same material films. The amplification has been achieved without use of any feedback structure, emphazising the efficiency of the antenna effect. The pumping threshold fluences for NPLs and QRs are observed to be similar, but no ASE is observed in QDs up to the damage threshold of the nanoparticle layers. The length variation investigation with nanosecond pumping resulted in the gain coefficients of 29 cm(−1) and 37 cm(−1) for QRs and NPLs, respectively. Nature Publishing Group UK 2018-03-02 /pmc/articles/PMC5834608/ /pubmed/29500408 http://dx.doi.org/10.1038/s41598-018-22287-9 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
Chhantyal, Parva
Naskar, Suraj
Birr, Tobias
Fischer, Tim
Lübkemann, Franziska
Chichkov, Boris N.
Dorfs, Dirk
Bigall, Nadja C.
Reinhardt, Carsten
Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems
title Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems
title_full Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems
title_fullStr Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems
title_full_unstemmed Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems
title_short Low Threshold Room Temperature Amplified Spontaneous Emission in 0D, 1D and 2D Quantum Confined Systems
title_sort low threshold room temperature amplified spontaneous emission in 0d, 1d and 2d quantum confined systems
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5834608/
https://www.ncbi.nlm.nih.gov/pubmed/29500408
http://dx.doi.org/10.1038/s41598-018-22287-9
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