Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires.
Low-temperature time-resolved photoluminescence spectroscopy is used to probe the dynamics of photoexcited carriers in single InP nanowires. At early times after pulsed excitation, the photoluminescence line shape displays a characteristic broadening, consistent with emission from a degenerate, high...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2007
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| _version_ | 1797103291447902208 |
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| author | Titova, L Hoang, T Yarrison-Rice, J Jackson, H Kim, Y Joyce, H Gao, Q Tan, H Jagadish, C Zhang, X Zou, J Smith, L |
| author_facet | Titova, L Hoang, T Yarrison-Rice, J Jackson, H Kim, Y Joyce, H Gao, Q Tan, H Jagadish, C Zhang, X Zou, J Smith, L |
| author_sort | Titova, L |
| collection | OXFORD |
| description | Low-temperature time-resolved photoluminescence spectroscopy is used to probe the dynamics of photoexcited carriers in single InP nanowires. At early times after pulsed excitation, the photoluminescence line shape displays a characteristic broadening, consistent with emission from a degenerate, high-density electron-hole plasma. As the electron-hole plasma cools and the carrier density decreases, the emission rapidly converges toward a relatively narrow band consistent with free exciton emission from the InP nanowire. The free excitons in these single InP nanowires exhibit recombination lifetimes closely approaching that measured in a high-quality epilayer, suggesting that in these InP nanowires, electrons and holes are relatively insensitive to surface states. This results in higher quantum efficiencies than other single-nanowire systems as well as significant state-filling and band gap renormalization, which is observed at high electron-hole carrier densities. |
| first_indexed | 2024-03-07T06:18:01Z |
| format | Journal article |
| id | oxford-uuid:f1bf229c-8ad9-4f68-8fad-66c3436328c9 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:18:01Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:f1bf229c-8ad9-4f68-8fad-66c3436328c92022-03-27T11:58:22ZDynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f1bf229c-8ad9-4f68-8fad-66c3436328c9EnglishSymplectic Elements at Oxford2007Titova, LHoang, TYarrison-Rice, JJackson, HKim, YJoyce, HGao, QTan, HJagadish, CZhang, XZou, JSmith, LLow-temperature time-resolved photoluminescence spectroscopy is used to probe the dynamics of photoexcited carriers in single InP nanowires. At early times after pulsed excitation, the photoluminescence line shape displays a characteristic broadening, consistent with emission from a degenerate, high-density electron-hole plasma. As the electron-hole plasma cools and the carrier density decreases, the emission rapidly converges toward a relatively narrow band consistent with free exciton emission from the InP nanowire. The free excitons in these single InP nanowires exhibit recombination lifetimes closely approaching that measured in a high-quality epilayer, suggesting that in these InP nanowires, electrons and holes are relatively insensitive to surface states. This results in higher quantum efficiencies than other single-nanowire systems as well as significant state-filling and band gap renormalization, which is observed at high electron-hole carrier densities. |
| spellingShingle | Titova, L Hoang, T Yarrison-Rice, J Jackson, H Kim, Y Joyce, H Gao, Q Tan, H Jagadish, C Zhang, X Zou, J Smith, L Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires. |
| title | Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires. |
| title_full | Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires. |
| title_fullStr | Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires. |
| title_full_unstemmed | Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires. |
| title_short | Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires. |
| title_sort | dynamics of strongly degenerate electron hole plasmas and excitons in single inp nanowires |
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