ArticleNano letters2016
Radiatively Limited Dephasing and Exciton Dynamics in MoSe2 Monolayers Revealed with Four-Wave Mixing Microscopy.
Article in Nano letters, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
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30 citing papers in PubMed.
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- Excitonic States in GaAs/AlNanomaterials (Basel, Switzerland) · 2025Article
- Shaping exciton polarization dynamics in 2D semiconductors by tailored ultrafast pulses.Light, science & applications · 2025Article
- Quantum coherence and interference of a single moiré exciton in nano-fabricated twisted monolayer semiconductor heterobilayers.Nature communications · 2024Article
- Quantum Beats between Spin-Singlet and Spin-Triplet Interlayer Exciton Transitions in WSeNano letters · 2024Article
- Interactions and ultrafast dynamics of exciton complexes in a monolayer semiconductor with electron gas.Nanophotonics (Berlin, Germany) · 2024Article
- Second Harmonic Generation in Janus Transition Metal Chalcogenide Oxide Monolayers: A First-Principles Investigation.Nanomaterials (Basel, Switzerland) · 2023Article
- Ultrafast Dynamics of Valley-Polarized Excitons in WSeNanomaterials (Basel, Switzerland) · 2023Article
- ZnPSeProceedings of the National Academy of Sciences of the United States of America · 2022Article
- Transient measurement of phononic states with covariance-based stochastic spectroscopy.Light, science & applications · 2022Article
- Destructive Photon Echo Formation in Six-Wave Mixing Signals of a MoSeAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
- Bosonic condensation of exciton-polaritons in an atomically thin crystal.Nature materials · 2021Article
- Experimental observation of topological ZNature communications · 2021Article
- Nonlinear Optical Response of a WSACS photonics · 2021Article
- Second-harmonic generation enhancement in monolayer transition-metal dichalcogenides by using an epsilon-near-zero substrate.Nanoscale advances · 2021Article
- Interplay between spin proximity effect and charge-dependent exciton dynamics in MoSeNature communications · 2020Article
- Nonlinear Optical Characterization of 2D Materials.Nanomaterials (Basel, Switzerland) · 2020Review
- Article
- Lineshape characterization of excitons in monolayer WSNanoscale advances · 2020Article
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8 authors.
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Abstract
By implementing four-wave mixing (FWM) microspectroscopy, we measure coherence and population dynamics of the exciton transitions in monolayers of MoSe2. We reveal their dephasing times T2 and radiative lifetime T1 in a subpicosecond (ps) range, approaching T2 = 2T1 and thus indicating radiatively limited dephasing at a temperature of 6 K. We elucidate the dephasing mechanisms by varying the temperature and by probing various locations on the flake exhibiting a different local disorder. At the nanosecond range, we observe the residual FWM produced by the incoherent excitons, which initially disperse toward the dark states but then relax back to the optically active states within the light cone. By introducing polarization-resolved excitation, we infer intervalley exciton dynamics, revealing an initial polarization degree of around 30%, constant during the initial subpicosecond decay, followed by the depolarization on a picosecond time scale. The FWM hyperspectral imaging reveals the doped and undoped areas of the sample, allowing us to investigate the neutral exciton, the charged one, or both transitions at the same time. In the latter, we observe the exciton-trion beating in the coherence evolution indicating their coherent coupling.
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