Back to Search
Start Over
Discrete quantum dot like emitters in monolayer MoSe2: Spatial mapping, Magneto-optics and Charge tuning
- Source :
- Applied Physics Letters 108, 142101 (2016)
- Publication Year :
- 2016
-
Abstract
- Transition metal dichalcogenide monolayers such as MoSe2,MoS2 and WSe2 are direct bandgap semiconductors with original optoelectronic and spin-valley properties. Here we report spectrally sharp, spatially localized emission in monolayer MoSe2. We find this quantum dot like emission in samples exfoliated onto gold substrates and also suspended flakes. Spatial mapping shows a correlation between the location of emitters and the existence of wrinkles (strained regions) in the flake. We tune the emission properties in magnetic and electric fields applied perpendicular to the monolayer plane. We extract an exciton g-factor of the discrete emitters close to -4, as for 2D excitons in this material. In a charge tunable sample we record discrete jumps on the meV scale as charges are added to the emitter when changing the applied voltage. The control of the emission properties of these quantum dot like emitters paves the way for further engineering of the light matter interaction in these atomically thin materials.<br />Comment: 5 pages, 2 figures
Details
- Database :
- arXiv
- Journal :
- Applied Physics Letters 108, 142101 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1602.07947
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.4945268