Ultrafast generation of pseudo-magnetic field for valley excitons in WSe2 monolayers
dc.contributor.author | Kim, J. | |
dc.contributor.author | Hong, X. | |
dc.contributor.author | Jin, C. | |
dc.contributor.author | Shi, S.-F. | |
dc.contributor.author | Chang, C.-Y. S. | |
dc.contributor.author | Chiu, Ming-Hui | |
dc.contributor.author | Li, Lain-Jong | |
dc.contributor.author | Wang, F. | |
dc.date.accessioned | 2015-01-20T05:58:47Z | |
dc.date.available | 2015-01-20T05:58:47Z | |
dc.date.issued | 2014-12-04 | |
dc.identifier.citation | Ultrafast generation of pseudo-magnetic field for valley excitons in WSe2 monolayers 2014, 346 (6214):1205 Science | |
dc.identifier.issn | 0036-8075 | |
dc.identifier.issn | 1095-9203 | |
dc.identifier.pmid | 25477455 | |
dc.identifier.doi | 10.1126/science.1258122 | |
dc.identifier.uri | http://hdl.handle.net/10754/338569 | |
dc.description.abstract | The valley pseudospin is a degree of freedom that emerges in atomically thin two-dimensional transition metal dichalcogenides (MX2). The capability to manipulate it, in analogy to the control of spin in spintronics, can open up exciting opportunities. Here, we demonstrate that an ultrafast and ultrahigh valley pseudo-magnetic field can be generated by using circularly polarized femtosecond pulses to selectively control the valley degree of freedom in monolayer MX2. Using ultrafast pump-probe spectroscopy, we observed a pure and valley-selective optical Stark effect in WSe2 monolayers from the nonresonant pump, resulting in an energy splitting of more than 10 milli-electron volts between the K and K′ valley exciton transitions. Our study opens up the possibility to coherently manipulate the valley polarization for quantum information applications. | |
dc.language.iso | en | |
dc.publisher | American Association for the Advancement of Science (AAAS) | |
dc.relation.url | http://www.sciencemag.org/cgi/doi/10.1126/science.1258122 | |
dc.relation.url | http://arxiv.org/abs/1407.2347 | |
dc.rights | Archived with thanks to Science | |
dc.title | Ultrafast generation of pseudo-magnetic field for valley excitons in WSe2 monolayers | |
dc.type | Article | |
dc.contributor.department | Material Science and Engineering Program | |
dc.contributor.department | Physical Science and Engineering (PSE) Division | |
dc.identifier.journal | Science | |
dc.eprint.version | Post-print | |
dc.contributor.affiliation | King Abdullah University of Science and Technology (KAUST) | |
dc.identifier.arxivid | 1407.2347 | |
kaust.person | Li, Lain-Jong | |
kaust.person | Chiu, Ming-Hui | |
dc.version | v1 | |
refterms.dateFOA | 2018-06-13T12:43:20Z | |
dc.date.published-online | 2014-12-04 | |
dc.date.published-print | 2014-12-05 | |
dc.date.posted | 2014-07-09 |
Files in this item
This item appears in the following Collection(s)
-
Articles
-
Physical Science and Engineering (PSE) Division
For more information visit: http://pse.kaust.edu.sa/ -
Material Science and Engineering Program
For more information visit: https://pse.kaust.edu.sa/study/academic-programs/material-science-and-engineering/Pages/default.aspx