Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters
We report on the modulation of the fine-structure splitting of quantum-confined excitons in localized quantum emitters hosted by a monolayer transition metal dichalcogenide (TMDC). The monolayer TMDC, tungsten diselenide (WSe₂), is encapsulated in a van der Waals heterostructure which enables the ap...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/120151 |
| _version_ | 1811070787752296448 |
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| author | Chakraborty, Chitraleema Jungwirth, Nicholas R. Fuchs, Gregory D. Vamivakas, A. Nick |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Chakraborty, Chitraleema Jungwirth, Nicholas R. Fuchs, Gregory D. Vamivakas, A. Nick |
| author_sort | Chakraborty, Chitraleema |
| collection | MIT |
| description | We report on the modulation of the fine-structure splitting of quantum-confined excitons in localized quantum emitters hosted by a monolayer transition metal dichalcogenide (TMDC). The monolayer TMDC, tungsten diselenide (WSe₂), is encapsulated in a van der Waals heterostructure which enables the application of an external electric field on the quantum-dot-like emitters hosted by the monolayer flake. The emitters exhibit quantum-confined Stark effect and a modulation in the fine-structure splitting (FSS) as a function of electric field. A maximum modulation of 1500μeV is observed in the FSS from the studied emitters. Finally, we measure the polarization response of the localized exciton emission as a function of electric field exhibiting strong circular polarization with decreasing fine-structure splitting, further confirming the suppression of the anisotropic electron-hole exchange interaction thats causes the FSS. |
| first_indexed | 2024-09-23T08:41:34Z |
| format | Article |
| id | mit-1721.1/120151 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:41:34Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1201512022-09-23T13:55:34Z Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters Chakraborty, Chitraleema Jungwirth, Nicholas R. Fuchs, Gregory D. Vamivakas, A. Nick Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Chakraborty, Chitraleema We report on the modulation of the fine-structure splitting of quantum-confined excitons in localized quantum emitters hosted by a monolayer transition metal dichalcogenide (TMDC). The monolayer TMDC, tungsten diselenide (WSe₂), is encapsulated in a van der Waals heterostructure which enables the application of an external electric field on the quantum-dot-like emitters hosted by the monolayer flake. The emitters exhibit quantum-confined Stark effect and a modulation in the fine-structure splitting (FSS) as a function of electric field. A maximum modulation of 1500μeV is observed in the FSS from the studied emitters. Finally, we measure the polarization response of the localized exciton emission as a function of electric field exhibiting strong circular polarization with decreasing fine-structure splitting, further confirming the suppression of the anisotropic electron-hole exchange interaction thats causes the FSS. National Science Foundation (U.S.) (Grant EFMA-1542707) National Science Foundation (U.S.) (Grant EFMA-1542707) United States. Air Force Office of Scientific Research (Grant FA9550-16-1-0020)) 2019-01-31T14:14:56Z 2019-01-31T14:14:56Z 2019-01 2018-06 2019-01-24T18:00:50Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/120151 Chakraborty, Chitraleema et al. "Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters." Physical Review B 99, 4 (January 2019): 045308 © 2019 American Physical Society en http://dx.doi.org/10.1103/PhysRevB.99.045308 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. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Chakraborty, Chitraleema Jungwirth, Nicholas R. Fuchs, Gregory D. Vamivakas, A. Nick Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters |
| title | Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters |
| title_full | Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters |
| title_fullStr | Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters |
| title_full_unstemmed | Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters |
| title_short | Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters |
| title_sort | electrical manipulation of the fine structure splitting of wse₂ quantum emitters |
| url | http://hdl.handle.net/1721.1/120151 |
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