Radial multiple quantum well GaAs/AlGaAs heterostructure formed in nanowires
| Autor: | C. A. de Souza, H. Arakaki, Yu. A. Pusep, B. G. M. Tavares, M. A. Tito |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Physics Photoluminescence Condensed Matter::Other FOTOLUMINESCÊNCIA Quantum wire Nanowire Shell (structure) Heterojunction 02 engineering and technology Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Molecular physics Core (optical fiber) Condensed Matter::Materials Science 0103 physical sciences General Materials Science Electrical and Electronic Engineering Atomic physics 0210 nano-technology Quantum well |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | Optical emission of the heterostructured GaAs/AlGaAs core/shell nanowires with a multiple quantum well structure of the shell was found dominant by spatially indirect recombination of the electrons in the NW core with the photoexcited holes confined in the QWs of the shell. Multiple photoluminescence peak structure corresponding to the contributions of the individual quantum wells was observed. Numerical calculations of the confined hole eigenstate energies allowed for determination of the characteristic parameters of the studied nanowires, such as the surface depletion potential, intrinsic electron concentration and the actual widths of the quantum wells and the barriers formed in the nanowire shell. The presented data suggest formation of highly uniform cylinder symmetry two-dimensional quantum wells embedded in the nanowire shell. |
| Databáze: | OpenAIRE |
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