Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires.
Nonequilibrium spin distributions in single GaAs/AlGaAs core-shell nanowires are excited using resonant polarized excitation at 10 K. At all excitation energies, we observe strong photoluminescence polarization due to suppressed radiative recombination of excitons with dipoles aligned perpendicular...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2007
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| _version_ | 1797053382135906304 |
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| author | Hoang, T Titova, L Yarrison-Rice, J Jackson, H Govorov, A Kim, Y Joyce, H Tan, H Jagadish, C Smith, L |
| author_facet | Hoang, T Titova, L Yarrison-Rice, J Jackson, H Govorov, A Kim, Y Joyce, H Tan, H Jagadish, C Smith, L |
| author_sort | Hoang, T |
| collection | OXFORD |
| description | Nonequilibrium spin distributions in single GaAs/AlGaAs core-shell nanowires are excited using resonant polarized excitation at 10 K. At all excitation energies, we observe strong photoluminescence polarization due to suppressed radiative recombination of excitons with dipoles aligned perpendicular to the nanowire. Excitation resonances are observed at 1- or 2-LO phonon energies above the exciton ground states. Using rate equation modeling, we show that, at the lowest energies, strongly nonequilibrium spin distributions are present and we estimate their spin relaxation rate. |
| first_indexed | 2024-03-06T18:42:57Z |
| format | Journal article |
| id | oxford-uuid:0d8678a5-a218-4151-90ec-68fbf902d672 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:42:57Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:0d8678a5-a218-4151-90ec-68fbf902d6722022-03-26T09:40:59ZResonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0d8678a5-a218-4151-90ec-68fbf902d672EnglishSymplectic Elements at Oxford2007Hoang, TTitova, LYarrison-Rice, JJackson, HGovorov, AKim, YJoyce, HTan, HJagadish, CSmith, LNonequilibrium spin distributions in single GaAs/AlGaAs core-shell nanowires are excited using resonant polarized excitation at 10 K. At all excitation energies, we observe strong photoluminescence polarization due to suppressed radiative recombination of excitons with dipoles aligned perpendicular to the nanowire. Excitation resonances are observed at 1- or 2-LO phonon energies above the exciton ground states. Using rate equation modeling, we show that, at the lowest energies, strongly nonequilibrium spin distributions are present and we estimate their spin relaxation rate. |
| spellingShingle | Hoang, T Titova, L Yarrison-Rice, J Jackson, H Govorov, A Kim, Y Joyce, H Tan, H Jagadish, C Smith, L Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires. |
| title | Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires. |
| title_full | Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires. |
| title_fullStr | Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires. |
| title_full_unstemmed | Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires. |
| title_short | Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires. |
| title_sort | resonant excitation and imaging of nonequilibrium exciton spins in single core shell gaas algaas nanowires |
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