ArticleNanomaterials (Basel, Switzerland)2023
Ultrafast Dynamics of Valley-Polarized Excitons in WSe
Article in Nanomaterials (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Extended valley lifetime and giant energy splitting induced by chiral plasmon-valley exciton selective coupling.Nature communications · 2026Article
- Dissecting intervalley coupling mechanisms in monolayer transition metal dichalcogenides.NPJ 2D materials and applications · 2026Article
- A holistic view of the dynamics of long-lived valley polarized dark excitonic states in monolayer WSNature communications · 2025Article
- Excitons and Phonons in Two-Dimensional Materials: From Fundamental to Applications.Nanomaterials (Basel, Switzerland) · 2023Article
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6 authors.
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Abstract
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.
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