Electrical manipulation of the fine-structure splitting of WSe₂ quantum emitters
Name
PhysRevB.99.045308.pdf
Size
546.95 KB
Format
Adobe PDF
Checksum (MD5)
0893225f80c7520a005ffb34fa11846f
Author(s)
Chakraborty, Chitraleema
Jungwirth, Nicholas R.
Fuchs, Gregory D.
Vamivakas, A. Nick
Date Issued
January 2019
Journal
Physical Review B
Publisher
American Physical Society
Citation
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
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
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.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.99.045308
