Ultrafast Dynamics of Valley-Polarized Excitons in WSe2 Monolayer Studied by Few-Cycle Laser Pulses
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10468724" target="_blank" >RIV/00216208:11320/23:10468724 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/23:PU148099
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_b9o5BGRK_" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_b9o5BGRK_</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/nano13071207" target="_blank" >10.3390/nano13071207</a>
Alternative languages
Result language
angličtina
Original language name
Ultrafast Dynamics of Valley-Polarized Excitons in WSe2 Monolayer Studied by Few-Cycle Laser Pulses
Original language description
We report on the experimental investigation of the ultrafast dynamics of valley-polarized excitons in monolayer WSe2 using transient reflection spectroscopy with few-cycle laser pulses with 7 fs duration. We observe that at room temperature, the anisotropic valley population of excitons decays on two different timescales. The shorter decay time of approximately 120 fs is related to the initial hot exciton relaxation related to the fast direct recombination of excitons from the radiative zone, while the slower picosecond dynamics corresponds to valley depolarization induced by Coloumb exchange-driven transitions of excitons between two inequivalent valleys.
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
Nanomaterials
ISSN
2079-4991
e-ISSN
2079-4991
Volume of the periodical
13
Issue of the periodical within the volume
7
Country of publishing house
CH - SWITZERLAND
Number of pages
14
Pages from-to
1207
UT code for WoS article
000970254500001
EID of the result in the Scopus database
2-s2.0-85152967942