Publication
Title
Biaxial strain tuning of exciton energy and polarization in monolayer WS₂
Author
Abstract
We perform micro-photoluminescence and Raman experiments to examine the impact of biaxial tensile strain on the optical properties of WS2 monolayers. A strong shift on the order of -130 meV per % of strain is observed in the neutral exciton emission at room temperature. Under near-resonant excitation, we measure a monotonic decrease in the circular polarization degree under the applied strain. We experimentally separate the effect of the strain-induced energy detuning and evaluate the pure effect coming from the biaxial strain. The analysis shows that the suppression of the circular polarization degree under the biaxial strain is related to an interplay of energy and polarization relaxation channels as well as to variations in the exciton oscillator strength affecting the long-range exchange interaction.
Language
English
Source (journal)
Applied physics letters / American Institute of Physics. - New York, N.Y., 1962, currens
Publication
New York, N.Y. : American Institute of Physics , 2023
ISSN
0003-6951 [print]
1077-3118 [online]
DOI
10.1063/5.0167724
Volume/pages
123 :22 (2023) , p. 1-6
Article Reference
223103
ISI
001124156400003
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Dynamics and structural analysis of 2D materials (DYNASTY).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 09.01.2024
Last edited 19.01.2024
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