Journal ArticleDOI
Resonant energy absorption of rare-gas clusters in strong laser pulses
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In this paper, the ionization dynamics of rare-gas clusters in strong femtosecond laser pulses are studied microscopically by means of classical molecular dynamics using a hierarchical tree code.Abstract:
The ionization dynamics of rare-gas clusters in strong femtosecond laser pulses is studied microscopically by means of classical molecular dynamics using a hierarchical tree code. Systematic investigations for laser pulses from 25 to 400 fs duration have shown a transition from field ionization to resonant excitation of a collective motion of the cluster electrons. The latter effect is associated with a strong energy absorption and can be microscopically identified by examining the phase lag of the electron oscillation with respect to the laser field. The optimal conditions depend, via the expansion time, strongly on the cluster size, which was varied from 102 up to 104 atoms.read more
Citations
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Journal ArticleDOI
Laser-driven nonlinear cluster dynamics
Th. Fennel,Karl-Heinz Meiwes-Broer,J. Tiggesbäumker,Paul-Gerhard Reinhard,Phuong Mai Dinh,Eric Suraud +5 more
TL;DR: In this paper, the authors provide an overview of key phenomena arising from laser-cluster interactions with focus on nonlinear optical excitations and discuss the underlying processes according to the current understanding.
Journal ArticleDOI
Mechanisms of cluster ionization in strong laser pulses
TL;DR: In this paper, the main experimental observables for energy transfer to a cluster and the major theoretical approaches have been devised, and compared the cluster response to standard 780 nm light pulses with the response to 100 nm pulses, already obtained at a VUV free electron laser (FEL) source, and with 3 nm light which will be available from x-ray FEL sources.
Journal ArticleDOI
Dopant-induced ignition of helium nanodroplets in intense few-cycle laser pulses.
Sivarama Krishnan,L. Fechner,M. Kremer,Vandana Sharma,B. Fischer,Nicolas Camus,J. Jha,M. Krishnamurthy,Thomas Pfeifer,Robert Moshammer,Joachim Ullrich,Frank Stienkemeier,Marcel Mudrich,Alexey Mikaberidze,Ulf Saalmann,Jan M. Rost +15 more
TL;DR: It is found that less than 10 dopant atoms "ignite" the droplet to generate a nonspherical electronic nanoplasma resulting ultimately in complete ionization and disintegration of all atoms, although the pristine He droplet is transparent for the laser intensities applied.
Journal ArticleDOI
Cluster nanoplasmas in strong FLASH pulses: formation, excitation and relaxation
TL;DR: In this article, the formation, excitation and relaxation of nanoplasmas in rare-gas clusters driven by strong pulses from free-electron lasers (FELs) with photon frequencies in the range of about 10 to 100 eV as currently available at FLASH are discussed.
Journal ArticleDOI
Interaction of intense ultrashort pulse lasers with clustersa)
G. M. Petrov,J. Davis +1 more
TL;DR: In this article, the dynamics of clusters composed of different material irradiated by a high-intensity ultrashort pulse laser was studied using a fully relativistic three-dimensional molecular dynamics model.
References
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TL;DR: In this article, the interaction of intense, femtosecond laser radiation with the large (50{endash}200 A) clusters produced in pulsed gas jets was examined.
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Todd Ditmire,John W. G. Tisch,Emma Springate,M. B. Mason,N. Hay,Roland Smith,J. P. Marangos,M. H. R. Hutchinson +7 more
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