Ultrafast valley-selective coherent optical manipulation with excitons in WSe2 and MoS2 monolayers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10467218" target="_blank" >RIV/00216208:11320/23:10467218 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/23:PU148620
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=I08hcxr2TL" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=I08hcxr2TL</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41699-023-00385-1" target="_blank" >10.1038/s41699-023-00385-1</a>
Alternative languages
Result language
angličtina
Original language name
Ultrafast valley-selective coherent optical manipulation with excitons in WSe2 and MoS2 monolayers
Original language description
Increasing the speed limits of conventional electronics requires innovative approaches to manipulate other quantum properties of electrons besides their charge. An alternative approach utilizes the valley degree of freedom in low-dimensional semiconductors. Here we demonstrate that the valley degeneracy of exciton energies in transition metal dichalcogenide monolayers may be lifted by coherent optical interactions on timescales corresponding to few tens of femtoseconds. The optical Stark and Bloch-Siegert effects generated by strong nonresonant circularly-polarized light induce valley-selective blue shifts of exciton quantum levels by more than 30 meV. We show these phenomena by studying the two most intensive exciton resonances in transiton metal dichalcogenide monolayers and compare the results to a theoretical model, which properly includes the Coulomb interaction and exciton dispersion. These results open the door for ultrafast valleytronics working at multiterahertz frequencies.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
<a href="/en/project/GA23-06369S" target="_blank" >GA23-06369S: Role of decoherence in high-order nonlinear optical interactions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
npj 2D Materials and Applications
ISSN
2397-7132
e-ISSN
2397-7132
Volume of the periodical
7
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
17
UT code for WoS article
000957379100001
EID of the result in the Scopus database
2-s2.0-85150941910