Magnetically controlled exciton transfer in hybrid quantum-dot–quantum-well nanostructures
| Autor: | Euclydes Marega, Greg Salamo, Z. Ya. Zhuchenko, E. R. Cardozo de Oliveira, Marcio D. Teodoro, Benito Alén, Yu. I. Mazur, Morgan E. Ware, V. Laurindo Jr., Georgiy G. Tarasov, G. E. Marques |
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| Přispěvatelé: | National Science Foundation (US), Consejo Superior de Investigaciones Científicas (España), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil) |
| Rok vydání: | 2019 |
| Předmět: |
Condensed Matter - Materials Science
Nanostructure Photoluminescence Materials science Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Condensed Matter::Other Exciton Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Condensed Matter::Materials Science Excited state Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics 0210 nano-technology CAMPO MAGNÉTICO Intensity (heat transfer) Excitation Wetting layer |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.100.035309 |
| Popis: | A magnetophotoluminescence study of the carrier transfer with hybrid InAs/GaAs-quantum-dot-InGaAs-quantum-well structures is carried out where we observe an unusual dependence of the photoluminescence (PL) on the GaAs barrier thickness at strong magnetic field and excitation density. For the case of a thin barrier the quantum-well (QW) PL intensity is observed to increase at the expense of a decrease in the quantum-dot (QD) PL intensity. This is attributed to changes in the interplane carrier dynamics in the QW and the wetting layer (WL) resulting from increasing the magnetic field along with changes in the coupling between QD excited states and exciton states in the QW and the WL. The authors gratefully acknowledge the financial support of the following agencies: National Science Foundation of the U.S. (Grants No. DMR1008107 and No. DMR-1108285),CSIC grant ICOOP-2017-COOPB20320, MINEICO grant EUIN2017- 88844, FAPESP (grants # 2013/18719-1, 2014/07375- 2, 2014/19142-2, 2018/01914-0), CNPq(164765/2018-2) and CAPES (Finance Code 001). |
| Databáze: | OpenAIRE |
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