Carrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumns
Time-integrated and time-resolved microphotoluminescence studies have been performed on In x Ga 1 - x N quantum disks at the tips of GaN nanocolumns. The results are analyzed in the context of current theories regarding an inhomogeneous strain distribution in the disk which is theorized to generate...
| Glavni autori: | , , , , , , , , , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
2011
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| _version_ | 1826302026815897600 |
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| author | Holmes, M Park, Y Wang, X Chan, C Jarjour, A Taylor, R Warner, J Luo, J El-Ella, H Oliver, R |
| author_facet | Holmes, M Park, Y Wang, X Chan, C Jarjour, A Taylor, R Warner, J Luo, J El-Ella, H Oliver, R |
| author_sort | Holmes, M |
| collection | OXFORD |
| description | Time-integrated and time-resolved microphotoluminescence studies have been performed on In x Ga 1 - x N quantum disks at the tips of GaN nanocolumns. The results are analyzed in the context of current theories regarding an inhomogeneous strain distribution in the disk which is theorized to generate lateral charge separation in the disks by strain induced band bending, an inhomogeneous polarization field distribution, and Fermi surface pinning. It is concluded that no lateral separation of carriers occurs in the quantum disks under investigation. Internal field screening by an increased carrier density in the QDisks at higher excitation densities is observed via a blue-shift of the emission and a dynamically changing decay time. Other possible explanations for these effects are discussed and discounted. Cathodoluminescence studies have also been carried out on the nanocolumns to provide insight into the physical origin of the luminescence. © 2011 American Institute of Physics. |
| first_indexed | 2024-03-07T05:41:17Z |
| format | Journal article |
| id | oxford-uuid:e5a7e6d1-8901-48ee-94f6-f7e6970be23d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:41:17Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:e5a7e6d1-8901-48ee-94f6-f7e6970be23d2022-03-27T10:25:33ZCarrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumnsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e5a7e6d1-8901-48ee-94f6-f7e6970be23dEnglishSymplectic Elements at Oxford2011Holmes, MPark, YWang, XChan, CJarjour, ATaylor, RWarner, JLuo, JEl-Ella, HOliver, RTime-integrated and time-resolved microphotoluminescence studies have been performed on In x Ga 1 - x N quantum disks at the tips of GaN nanocolumns. The results are analyzed in the context of current theories regarding an inhomogeneous strain distribution in the disk which is theorized to generate lateral charge separation in the disks by strain induced band bending, an inhomogeneous polarization field distribution, and Fermi surface pinning. It is concluded that no lateral separation of carriers occurs in the quantum disks under investigation. Internal field screening by an increased carrier density in the QDisks at higher excitation densities is observed via a blue-shift of the emission and a dynamically changing decay time. Other possible explanations for these effects are discussed and discounted. Cathodoluminescence studies have also been carried out on the nanocolumns to provide insight into the physical origin of the luminescence. © 2011 American Institute of Physics. |
| spellingShingle | Holmes, M Park, Y Wang, X Chan, C Jarjour, A Taylor, R Warner, J Luo, J El-Ella, H Oliver, R Carrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumns |
| title | Carrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumns |
| title_full | Carrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumns |
| title_fullStr | Carrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumns |
| title_full_unstemmed | Carrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumns |
| title_short | Carrier dynamics of InxGa1-xN quantum disks embedded in GaN nanocolumns |
| title_sort | carrier dynamics of inxga1 xn quantum disks embedded in gan nanocolumns |
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