Exciton front propagation in photoexcited GaAs quantum wells
We report on the study of spatiotemporal self-organization of carriers in photoexcited GaAs quantum wells. Propagating interfaces between electron-rich and hole-rich regions are seen as expanding and collapsing exciton rings in exciton emission patterns. The interfaces preserve their integrity durin...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/58780 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1826198903980032000 |
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| author | Yang, Sen Butov, L. V. Simons, B. D. Gossard, A. C. Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Yang, Sen Butov, L. V. Simons, B. D. Gossard, A. C. Levitov, Leonid |
| author_sort | Yang, Sen |
| collection | MIT |
| description | We report on the study of spatiotemporal self-organization of carriers in photoexcited GaAs quantum wells. Propagating interfaces between electron-rich and hole-rich regions are seen as expanding and collapsing exciton rings in exciton emission patterns. The interfaces preserve their integrity during expansion, remaining as sharp as in the steady state, which indicates that the dynamics is controlled by carrier transport. The front propagation velocity is measured and compared to theoretical model. The measurements of expanding and collapsing exciton rings afford a contactless method for probing the electron and hole transport. |
| first_indexed | 2024-09-23T11:11:47Z |
| format | Article |
| id | mit-1721.1/58780 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:11:47Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/587802022-09-27T17:45:23Z Exciton front propagation in photoexcited GaAs quantum wells Yang, Sen Butov, L. V. Simons, B. D. Gossard, A. C. Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Levitov, Leonid Levitov, Leonid We report on the study of spatiotemporal self-organization of carriers in photoexcited GaAs quantum wells. Propagating interfaces between electron-rich and hole-rich regions are seen as expanding and collapsing exciton rings in exciton emission patterns. The interfaces preserve their integrity during expansion, remaining as sharp as in the steady state, which indicates that the dynamics is controlled by carrier transport. The front propagation velocity is measured and compared to theoretical model. The measurements of expanding and collapsing exciton rings afford a contactless method for probing the electron and hole transport. United States. Army Research Office National Science Foundation 2010-09-30T14:44:56Z 2010-09-30T14:44:56Z 2010-03 2010-02 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/58780 Yang, Sen et al. “Exciton front propagation in photoexcited GaAs quantum wells.” Physical Review B 81.11 (2010): 115320. © 2010 The American Physical Society https://orcid.org/0000-0002-4268-731X en_US http://dx.doi.org/10.1103/PhysRevB.81.115320 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Yang, Sen Butov, L. V. Simons, B. D. Gossard, A. C. Levitov, Leonid Exciton front propagation in photoexcited GaAs quantum wells |
| title | Exciton front propagation in photoexcited GaAs quantum wells |
| title_full | Exciton front propagation in photoexcited GaAs quantum wells |
| title_fullStr | Exciton front propagation in photoexcited GaAs quantum wells |
| title_full_unstemmed | Exciton front propagation in photoexcited GaAs quantum wells |
| title_short | Exciton front propagation in photoexcited GaAs quantum wells |
| title_sort | exciton front propagation in photoexcited gaas quantum wells |
| url | http://hdl.handle.net/1721.1/58780 https://orcid.org/0000-0002-4268-731X |
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