Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers
We study the time coherence of the photoluminescence radiated by spatially indirect excitons confined in a 10 μ m electrostatic trap. Above a critical temperature of about 1 K, we show that the photoluminescence is homogeneously broadened in the dilute regime, with a spectral width around 500 μ eV t...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2018-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aad30a |
| _version_ | 1797750655596625920 |
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| author | Romain Anankine Suzanne Dang Mussie Beian Edmond Cambril Carmen Gomez Carbonell Aristide Lemaître François Dubin |
| author_facet | Romain Anankine Suzanne Dang Mussie Beian Edmond Cambril Carmen Gomez Carbonell Aristide Lemaître François Dubin |
| author_sort | Romain Anankine |
| collection | DOAJ |
| description | We study the time coherence of the photoluminescence radiated by spatially indirect excitons confined in a 10 μ m electrostatic trap. Above a critical temperature of about 1 K, we show that the photoluminescence is homogeneously broadened in the dilute regime, with a spectral width around 500 μ eV that weakly varies with the exciton density. By contrast, the spectral width reduces by two-fold below the critical temperature and for experimental parameters at which excitons undergo a gray Bose–Einstein condensation. We find evidence showing that the photoluminescence temporal coherence is limited by interactions between excitons and a low concentration of residual excess charges, leading to a minimum photoluminescence spectral width of around 300 μ eV in the condensed regime. |
| first_indexed | 2024-03-12T16:36:59Z |
| format | Article |
| id | doaj.art-e98e22fed3d44c52af062509701ca330 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:36:59Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-e98e22fed3d44c52af062509701ca3302023-08-08T14:52:22ZengIOP PublishingNew Journal of Physics1367-26302018-01-0120707304910.1088/1367-2630/aad30aTemporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriersRomain Anankine0Suzanne Dang1Mussie Beian2Edmond Cambril3Carmen Gomez Carbonell4Aristide Lemaître5https://orcid.org/0000-0003-1892-9726François Dubin6Sorbonne Université UPMC , CNRS-UMR 7588, Institut des NanoSciences de Paris, 4 Place Jussieu, F-75005 Paris, FranceSorbonne Université UPMC , CNRS-UMR 7588, Institut des NanoSciences de Paris, 4 Place Jussieu, F-75005 Paris, FranceSorbonne Université UPMC , CNRS-UMR 7588, Institut des NanoSciences de Paris, 4 Place Jussieu, F-75005 Paris, FranceCentre for Nanoscience and Nanotechnology—C2N, University Paris Saclay and CNRS , Route de Nozay, F-91460 Marcoussis, FranceCentre for Nanoscience and Nanotechnology—C2N, University Paris Saclay and CNRS , Route de Nozay, F-91460 Marcoussis, FranceCentre for Nanoscience and Nanotechnology—C2N, University Paris Saclay and CNRS , Route de Nozay, F-91460 Marcoussis, FranceSorbonne Université UPMC , CNRS-UMR 7588, Institut des NanoSciences de Paris, 4 Place Jussieu, F-75005 Paris, FranceWe study the time coherence of the photoluminescence radiated by spatially indirect excitons confined in a 10 μ m electrostatic trap. Above a critical temperature of about 1 K, we show that the photoluminescence is homogeneously broadened in the dilute regime, with a spectral width around 500 μ eV that weakly varies with the exciton density. By contrast, the spectral width reduces by two-fold below the critical temperature and for experimental parameters at which excitons undergo a gray Bose–Einstein condensation. We find evidence showing that the photoluminescence temporal coherence is limited by interactions between excitons and a low concentration of residual excess charges, leading to a minimum photoluminescence spectral width of around 300 μ eV in the condensed regime.https://doi.org/10.1088/1367-2630/aad30aquantum wellsdipolar excitonscoherenceBose–Einstein condensation |
| spellingShingle | Romain Anankine Suzanne Dang Mussie Beian Edmond Cambril Carmen Gomez Carbonell Aristide Lemaître François Dubin Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers New Journal of Physics quantum wells dipolar excitons coherence Bose–Einstein condensation |
| title | Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers |
| title_full | Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers |
| title_fullStr | Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers |
| title_full_unstemmed | Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers |
| title_short | Temporal coherence of spatially indirect excitons across Bose–Einstein condensation: the role of free carriers |
| title_sort | temporal coherence of spatially indirect excitons across bose einstein condensation the role of free carriers |
| topic | quantum wells dipolar excitons coherence Bose–Einstein condensation |
| url | https://doi.org/10.1088/1367-2630/aad30a |
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