Valley polarization in MoS2 monolayers by optical pumping

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 17 Jun 2012Embargo end date: 01 Feb 2012 China (People's Republic of) English Publisher:Springer Science and Business Media LLCJournal:Nature Nanotechnology, volume 7, pages 490-493 (issn: 1748-3387, eissn: 1748-3395,

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Authors: Zeng, H; Dai, J; Xiao, D; Cui, X; Yao, W;

doi: 10.1038/nnano.2012.95 , 10.48550/arxiv.1202.1592

pmid: 22706701

arXiv: 1202.1592

handle: 10722/164496

Valley polarization in MoS2 monolayers by optical pumping

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Abstract

We report experimental evidences on selective occupation of the degenerate valleys in MoS2 monolayers by circularly polarized optical pumping. Over 30% valley polarization has been observed at K and K' valley via the polarization resolved luminescence spectra on pristine MoS2 monolayers. It demonstrates one viable way to generate and detect valley polarization towards the conceptual valleytronics applications with information carried by the valley index.

Country

China (People's Republic of)

Related Organizations

Oak Ridge National Laboratory
United States
University of Hong Kong (香港大學)
China (People's Republic of)
Naval Research Laboratory Materials Science and Technology Division
United States
Southern University of Science and Technology
China (People's Republic of)
University of Hong Kong
China (People's Republic of)

Keywords

Molybdenum, Energy, Luminescence, Condensed Matter - Mesoscale and Nanoscale Physics, Optical Phenomena, FOS: Physical sciences, Electrons, 541, Electron, Semiconductors, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Devices, Nanotechnology, Chemical analysis, Electronics

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