Details
| Original language | English |
|---|---|
| Journal | Physica Status Solidi (B): Basic Research |
| Publication status | E-pub ahead of print - 27 Jan 2025 |
| Externally published | Yes |
Abstract
Due to their unique optical properties, 2D monolayer transition metal dichalcogenides (TMDCs) show great potential for future electronic and photonic devices, but for real applications, the performance of those is still in need of improvement at the moment. Understanding the exciton and charge carrier dynamics in TMDCs plays a key role in device applications, especially as photonic devices operate under strongly nonequilibrium conditions, as well as for fundamental understanding of the TMDC materials. By employing pump-probe femtosecond time-resolved spectroscopic ellipsometry, the ultrafast exciton/charge carrier dynamics in monolayer (Formula presented.) by studying their impact on the materials dielectric function as a function of time is investigated. From the experiments and analysis of the time-dependent changes in the dielectric function after laser-excitation, a comprehensive model of the dynamics of the excitons, trions, and charge carriers within the Brillouin zone of the electronic structure is derived. The formation of trions, carrier scattering processes between the Γ- and K-point of the Brillouin zone, arising of new intravalence and intraconduction band transitions, carrier relaxation within the bands, as well as recombination processes are found.
Keywords
- ellipsometry, exciton dynamics, monolayer MoS, transient dielectric function, ultrafast dynamics
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica Status Solidi (B): Basic Research, 27.01.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ultrafast Exciton and Charge Carrier Dynamics in Monolayer MoS2 Measured with Time-Resolved Spectroscopic Ellipsometry
AU - Krätschmer, Lucas
AU - Slimi, Younes
AU - Trefflich, Lukas
AU - Espinoza, Shirley
AU - Rebarz, Mateusz
AU - Vazquez-Miranda, Saul
AU - Seyfarth, Jakob
AU - Pflug, Theo
AU - Olbrich, Markus
AU - Stiehm, Noah
AU - Hähnlein, Bernd
AU - Sturm, Chris
AU - Horn, Alexander
AU - Andreasson, Jakob
AU - Grundmann, Marius
AU - Krischok, Stefan
AU - Schmidt-Grund, Rüdiger
N1 - Publisher Copyright: © 2024 The Author(s). physica status solidi (b) basic solid state physics published by Wiley-VCH GmbH.
PY - 2025/1/27
Y1 - 2025/1/27
N2 - Due to their unique optical properties, 2D monolayer transition metal dichalcogenides (TMDCs) show great potential for future electronic and photonic devices, but for real applications, the performance of those is still in need of improvement at the moment. Understanding the exciton and charge carrier dynamics in TMDCs plays a key role in device applications, especially as photonic devices operate under strongly nonequilibrium conditions, as well as for fundamental understanding of the TMDC materials. By employing pump-probe femtosecond time-resolved spectroscopic ellipsometry, the ultrafast exciton/charge carrier dynamics in monolayer (Formula presented.) by studying their impact on the materials dielectric function as a function of time is investigated. From the experiments and analysis of the time-dependent changes in the dielectric function after laser-excitation, a comprehensive model of the dynamics of the excitons, trions, and charge carriers within the Brillouin zone of the electronic structure is derived. The formation of trions, carrier scattering processes between the Γ- and K-point of the Brillouin zone, arising of new intravalence and intraconduction band transitions, carrier relaxation within the bands, as well as recombination processes are found.
AB - Due to their unique optical properties, 2D monolayer transition metal dichalcogenides (TMDCs) show great potential for future electronic and photonic devices, but for real applications, the performance of those is still in need of improvement at the moment. Understanding the exciton and charge carrier dynamics in TMDCs plays a key role in device applications, especially as photonic devices operate under strongly nonequilibrium conditions, as well as for fundamental understanding of the TMDC materials. By employing pump-probe femtosecond time-resolved spectroscopic ellipsometry, the ultrafast exciton/charge carrier dynamics in monolayer (Formula presented.) by studying their impact on the materials dielectric function as a function of time is investigated. From the experiments and analysis of the time-dependent changes in the dielectric function after laser-excitation, a comprehensive model of the dynamics of the excitons, trions, and charge carriers within the Brillouin zone of the electronic structure is derived. The formation of trions, carrier scattering processes between the Γ- and K-point of the Brillouin zone, arising of new intravalence and intraconduction band transitions, carrier relaxation within the bands, as well as recombination processes are found.
KW - ellipsometry
KW - exciton dynamics
KW - monolayer MoS
KW - transient dielectric function
KW - ultrafast dynamics
UR - http://www.scopus.com/inward/record.url?scp=85216230918&partnerID=8YFLogxK
U2 - 10.1002/pssb.202400547
DO - 10.1002/pssb.202400547
M3 - Article
AN - SCOPUS:85216230918
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
ER -