ArticleNature communications2020
Ultrafast relaxation of photoexcited superfluid He nanodroplets.
Article in Nature communications, 2020. 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.
- XUV fluorescence as a probe of interatomic coulombic decay of resonantly excited He nanodroplets.Scientific reports · 2026Article
- Three-dimensional femtosecond snapshots of isolated faceted nanostructures.Science advances · 2023Article
- Dimer photofragmentation and cation ejection dynamics in helium nanodroplets.Physical chemistry chemical physics : PCCP · 2022Article
- Article
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Authors and funding
26 authors.
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Abstract
The relaxation of photoexcited nanosystems is a fundamental process of light-matter interaction. Depending on the couplings of the internal degrees of freedom, relaxation can be ultrafast, converting electronic energy in a few fs, or slow, if the energy is trapped in a metastable state that decouples from its environment. Here, we study helium nanodroplets excited resonantly by femtosecond extreme-ultraviolet (XUV) pulses from a seeded free-electron laser. Despite their superfluid nature, we find that helium nanodroplets in the lowest electronically excited states undergo ultrafast relaxation. By comparing experimental photoelectron spectra with time-dependent density functional theory simulations, we unravel the full relaxation pathway: Following an ultrafast interband transition, a void nanometer-sized bubble forms around the localized excitation (He[Formula: see text]) within 1 ps. Subsequently, the bubble collapses and releases metastable He[Formula: see text] at the droplet surface. This study highlights the high level of detail achievable in probing the photodynamics of nanosystems using tunable XUV pulses.
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