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Robust optical emission polarization in MoS2monolayers through selective valley excitation
- Source :
- Physical Review B. 86
- Publication Year :
- 2012
- Publisher :
- American Physical Society (APS), 2012.
-
Abstract
- We report polarization resolved photoluminescence from monolayer MoS2, a two-dimensional, non-centrosymmetric crystal with direct energy gaps at two different valleys in momentum space. The inherent chiral optical selectivity allows exciting one of these valleys and close to 90% polarized emission at 4K is observed with 40% polarization remaining at 300K. The high polarization degree of the emission remains unchanged in transverse magnetic fields up to 9T indicating robust, selective valley excitation.<br />Comment: 5 pages, 3 figures
- Subjects :
- Condensed Matter - Materials Science
Photoluminescence
Materials science
business.industry
Graphene
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
Position and momentum space
Condensed Matter Physics
Polarization (waves)
Molecular physics
Electronic, Optical and Magnetic Materials
law.invention
Transverse magnetic
Optics
law
Monolayer
Optical emission spectroscopy
business
Excitation
Subjects
Details
- ISSN :
- 1550235X and 10980121
- Volume :
- 86
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi.dedup.....048c0b13264f91ffd8adeef43381b356