Evolution of dopant-induced helium nanoplasmas

Krishnan, S. S.; Peltz, Christian; Fechner, Lutz; Sharma, Vandana; Kremer, M.; Fischer, Bettina; Camus, Nicolas; Pfeifer, Thomas; Jha, J.; Krishnamurthy, M.; Schröter, C. D.; Ullrich, J.; Stienkemeier, F.; Moshammer, R.; Fennel, Thomas; Mudrich, M.

doi:10.1088/1367-2630/14/7/075016

Cited by 31 publications

(36 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The power absorption continues to show strong oscillations which fade away with decreasing laser electric field strength, but do not lead to further net energy absorption. Such pronounced energy absorptions were assigned phenomenologically to the sweeping over a resonance of the nanoplasma electron density [14,36]. The total electron kinetic energy Te passes its maximum shortly before Wabs(t) converges to its final value.…”

Section: Simulated Ionization Dynamicsmentioning

confidence: 99%

“…In a comparative study of lead (Pb) clusters formed in He droplets and as free clusters which were irradiated by two time-delayed pulses, the maximum yield of high charge states was reached at significantly earlier delay times for Pb clusters embedded in He droplets [13]. This was rationalized in later studies by the fast expansion of the ionized He shell around the embedded dopant cluster leading to a shifting of the plasmon resonance conditions in the expanding nanoplasma to earlier times [14]. For silver atoms embedded in He nanodroplets the transient reduction of the final charge states was attributed to charge transfer occurring between multiply charged dopant atoms and the surrounding He [15].…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Charging dynamics of dopants in helium nanoplasmas

Heidenreich

Grüner

Schomas

et al. 2017

Journal of Modern Optics

View full text Add to dashboard Cite

We present a combined experimental and theoretical study of the charging dynamics of helium nanodroplets doped with atoms of different species and irradiated by intense near-infrared (NIR) laser pulses (≤10 15 Wcm -2). In particular, we elucidate the interplay of dopant ionization inducing the ignition of a helium nanoplasma, and the charging of the dopant atoms driven by the ionized helium host. Most efficient nanoplasma ignition and charging is found when doping helium droplets with xenon atoms, in which case high charge states both of helium (He 2+ ) and of xenon (Xe 21+ ) are detected. In contrast, only low charge states of helium and dopants are measured when doping with potassium and calcium atoms. Classical molecular dynamics simulations which include focal averaging generally reproduce the experimental results and provide detailed insights into the correlated charging dynamics of guest and host clusters.

show abstract

Section: Simulated Ionization Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Charging dynamics of dopants in helium nanoplasmas

Heidenreich

Grüner

Schomas

et al. 2017

Journal of Modern Optics

View full text Add to dashboard Cite

show abstract

“…(b) Optimal delay times for doped He nanodroplets of various sizes. Adapted from [208] of the plasma ("plasmon"), which for the spherical case is given by…”

Section: Fig 11: (A) Hementioning

confidence: 99%

“…11 (a) [208]. By using few-cycle pulses of a duration ∼ 10 fs changes of the optical response during the pulses due to the ionic motion was excluded.…”

Section: +mentioning

confidence: 99%

“…Femtosecond vibrational and electronic coherence spectroscopy has probed the decoherence and relaxation dynamics of molecules weakly bound to the He droplet surface [71,153,154]. Using newly available ultrashort laser pulses, the exceptional behavior of doped He droplets when undergoing the transition into highly charged nanoplasmas have been explored theoretically and experimentally [208,209].…”

Section: Summary and Prospectsmentioning

confidence: 99%

See 1 more Smart Citation

Photoionisaton of pure and doped helium nanodroplets

Mudrich

Stienkemeier

2014

International Reviews in Physical Chemistry

118

114

View full text Add to dashboard Cite

Helium nanodroplets, commonly regarded as the "nearly ideal spectroscopic matrix", are being actively studied for more than two decades now. While they mostly serve as cold, weakly perturbing and transparent medium for high-resolution spectroscopy of embedded molecules, their intrinsic quantum properties such as microscopic superfluidity still are subject-matter of current research. This article reviews recent work on pure and doped He nanodroplets using PI spectroscopy, an approach which has greatly advanced in the past years. While the notion of the ideal spectroscopic matrix mostly no longer holds in this context, photoionization techniques provide detailed insights into the photo-physical properties of pure and doped He nanodroplets and their relaxation dynamics following electronic excitation. Exploiting nowadays available high laser fields, even highly ionized states of matter on the nanoscale can be formed. Our particular focus lies on recent experimental progress including fs time-resolved spectroscopy, photoion and electron imaging, and novel sources of highly energetic radiation.

show abstract

Ultrafast Dynamics in Helium Droplets

Bruder

Koch

Mudrich

et al. 2022

Topics in Applied Physics

View full text Add to dashboard Cite

Helium nanodroplets are peculiar systems, as condensed superfluid entities on the nanoscale, and as vessels for studies of molecules and molecular aggregates and their quantum properties at very low temperature. For both aspects, the dynamics upon the interaction with light is fundamental for understanding the properties of the systems. In this chapter we focus on time-resolved experiments in order to study ultrafast dynamics in neat as well as doped helium nanodroplets. Recent experimental approaches are reviewed, ranging from time-correlated photon detection to femtosecond pump-probe photoelectron and photoion spectroscopy, coherent multidimensional spectroscopy as well as applications of strong laser fields and novel, extreme ultraviolet light sources. The experiments examined in more detail investigate the dynamics of atomic and molecular dopants, including coherent wave packet dynamics and long-lived vibrational coherences of molecules attached to and immersed inside helium droplets. Furthermore, the dynamics of highly-excited helium droplets including interatomic Coulombic decay and nanoplasma states are discussed. Finally, an outlook concludes on the perspectives of time-resolved experiments with helium droplets, including recent options provided by new radiation sources of femto- or even attosecond laser pulses up to the soft X-ray range.

show abstract

Evolution of dopant-induced helium nanoplasmas

Cited by 31 publications

References 29 publications

Charging dynamics of dopants in helium nanoplasmas

Charging dynamics of dopants in helium nanoplasmas

Photoionisaton of pure and doped helium nanodroplets

Ultrafast Dynamics in Helium Droplets

Contact Info

Product

Resources

About