Engineering 2D Material Exciton Line Shape with Graphene/<i>h</i>-BN Encapsulation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU151422" target="_blank" >RIV/00216305:26620/24:PU151422 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.nanolett.3c05063" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.nanolett.3c05063</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.nanolett.3c05063" target="_blank" >10.1021/acs.nanolett.3c05063</a>
Alternative languages
Result language
angličtina
Original language name
Engineering 2D Material Exciton Line Shape with Graphene/<i>h</i>-BN Encapsulation
Original language description
Control over the optical properties of atomically thin two-dimensional (2D) layers, including those of transition metal dichalcogenides (TMDs), is needed for future optoelectronic applications. Here, the near-field coupling between TMDs and graphene/graphite is used to engineer the exciton line shape and charge state. Fano-like asymmetric spectral features are produced in WS2, MoSe2, and WSe2 van der Waals heterostructures combined with graphene, graphite, or jointly with hexagonal boron nitride (h-BN) as supporting or encapsulating layers. Furthermore, trion emission is suppressed in h-BN encapsulated WSe2/graphene with a neutral exciton red shift (44 meV) and binding energy reduction (30 meV). The response of these systems to electron beam and light probes is well-described in terms of 2D optical conductivities of the involved materials. Beyond fundamental insights into the interaction of TMD excitons with structured environments, this study opens an unexplored avenue toward shaping the spectral profile of narrow optical modes for application in nanophotonic devices.
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
10400 - Chemical sciences
Result continuities
Project
<a href="/en/project/GM23-05119M" target="_blank" >GM23-05119M: Shaped beams for a new era of electron microscopy and spectroscopy</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nano Letters
ISSN
1530-6984
e-ISSN
1530-6992
Volume of the periodical
24
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
3678-3685
UT code for WoS article
001183911200001
EID of the result in the Scopus database
2-s2.0-85187715409