Phonon replicas in ZnO/ZnMgO multi-quantum wells
The photoluminescence properties of ZnO/ZnMgO multiquantum wells have been investigated by continuous and time-resolved photoluminescence spectra at various temperatures. Strong first-order and second-order longitudinal optical ~LO!-phonon replicas were observed in the emission spectra. Both the zer...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2009
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| Online Access: | https://hdl.handle.net/10356/104389 http://hdl.handle.net/10220/6149 |
| _version_ | 1826111142129303552 |
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| author | Tamura, K. Koinuma, H. Sun, Handong Segawa, Y. Kawasaki, M. Ohtomo, A. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Tamura, K. Koinuma, H. Sun, Handong Segawa, Y. Kawasaki, M. Ohtomo, A. |
| author_sort | Tamura, K. |
| collection | NTU |
| description | The photoluminescence properties of ZnO/ZnMgO multiquantum wells have been investigated by continuous and time-resolved photoluminescence spectra at various temperatures. Strong first-order and second-order longitudinal optical ~LO!-phonon replicas were observed in the emission spectra. Both the zero-phonon emission and its LO-phonon replicas can be resolved into two components with different temperature dependence. The observation of LO-phonon replicas provided an additional way to characterize the recombination mechanism in quantum wells. Two kinds of excitons are responsible for the resolved emission components and have different coupling strength with LO phonons: one is donor bound excitons which dominated at low temperatures, the other one is the localized excitons due to the well width fluctuation which took over the dominated emission at high temperatures. |
| first_indexed | 2024-10-01T02:45:48Z |
| format | Journal Article |
| id | ntu-10356/104389 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:45:48Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/1043892023-02-28T19:45:07Z Phonon replicas in ZnO/ZnMgO multi-quantum wells Tamura, K. Koinuma, H. Sun, Handong Segawa, Y. Kawasaki, M. Ohtomo, A. School of Physical and Mathematical Sciences DRNTU::Science::Physics::Optics and light The photoluminescence properties of ZnO/ZnMgO multiquantum wells have been investigated by continuous and time-resolved photoluminescence spectra at various temperatures. Strong first-order and second-order longitudinal optical ~LO!-phonon replicas were observed in the emission spectra. Both the zero-phonon emission and its LO-phonon replicas can be resolved into two components with different temperature dependence. The observation of LO-phonon replicas provided an additional way to characterize the recombination mechanism in quantum wells. Two kinds of excitons are responsible for the resolved emission components and have different coupling strength with LO phonons: one is donor bound excitons which dominated at low temperatures, the other one is the localized excitons due to the well width fluctuation which took over the dominated emission at high temperatures. Published version 2009-11-13T03:59:42Z 2019-12-06T21:31:50Z 2009-11-13T03:59:42Z 2019-12-06T21:31:50Z 2002 2002 Journal Article Sun, H. D., Segawa, Y., Kawasaki, M., Ohtomo, A., Tamura, K., & Koinuma, H. (2002). Phonon replicas in ZnO/ZnMgO multi-quantum wells. Journal of Applied Physics., 91(10), 6457-6460. 0021-8979 https://hdl.handle.net/10356/104389 http://hdl.handle.net/10220/6149 10.1063/1.1467627 en Journal of Applied Physics. Journal of Applied Physics © 2002 American Institute of Physics. The journal's website is located at http://jap.aip.org/. 5 p. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Optics and light Tamura, K. Koinuma, H. Sun, Handong Segawa, Y. Kawasaki, M. Ohtomo, A. Phonon replicas in ZnO/ZnMgO multi-quantum wells |
| title | Phonon replicas in ZnO/ZnMgO multi-quantum wells |
| title_full | Phonon replicas in ZnO/ZnMgO multi-quantum wells |
| title_fullStr | Phonon replicas in ZnO/ZnMgO multi-quantum wells |
| title_full_unstemmed | Phonon replicas in ZnO/ZnMgO multi-quantum wells |
| title_short | Phonon replicas in ZnO/ZnMgO multi-quantum wells |
| title_sort | phonon replicas in zno znmgo multi quantum wells |
| topic | DRNTU::Science::Physics::Optics and light |
| url | https://hdl.handle.net/10356/104389 http://hdl.handle.net/10220/6149 |
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