Low threshold room temperature amplified spontaneous emission in 0D, 1D and 2D quantum confined systems

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dc.identifier.uri http://dx.doi.org/10.15488/3356
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/3386
dc.contributor.author Chhantyal, Parva
dc.contributor.author Naskar, Suraj
dc.contributor.author Birr, Tobias
dc.contributor.author Fischer, Tim
dc.contributor.author Lübkemann, Franziska
dc.contributor.author Chichkov, Boris
dc.contributor.author Dorfs, Dirk
dc.contributor.author Bigall, Nadja C.
dc.contributor.author Reinhardt, Carsten
dc.date.accessioned 2018-05-23T06:37:57Z
dc.date.available 2018-05-23T06:37:57Z
dc.date.issued 2018
dc.identifier.citation Chhantyal, P.; Naskar, S.; Birr, T.; Fischer, T.; Lübkemann, F. et al.: Low threshold room temperature amplified spontaneous emission in 0D, 1D and 2D quantum confined systems. In: Scientific Reports 8 (2018), Nr. 1, 3962. DOI: https://doi.org/10.1038/s41598-018-22287-9
dc.description.abstract 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. eng
dc.language.iso eng
dc.publisher London : Nature Publishing Group
dc.relation.ispartofseries Scientific Reports 8 (2018), Nr. 1
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject cadmium selenide/cadmium sulfide eng
dc.subject CdSe/CdS eng
dc.subject amplified spontaneous emission (ASE) eng
dc.subject NPL eng
dc.subject.ddc 500 | Naturwissenschaften ger
dc.subject.ddc 600 | Technik ger
dc.title Low threshold room temperature amplified spontaneous emission in 0D, 1D and 2D quantum confined systems
dc.type article
dc.type Text
dc.relation.issn 2045-2322
dc.relation.doi https://doi.org/10.1038/s41598-018-22287-9
dc.bibliographicCitation.issue 1
dc.bibliographicCitation.volume 8
dc.bibliographicCitation.firstPage 3962
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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