Optimized energetic particle emissions from Xe clusters in intense laser fields

Fukuda, Yuji; Yamakawa, Koichi; Akahane, Y.; Aoyama, M.; Inoue, Norihiro; Ueda, Hitoshi; Kishimoto, Y.

doi:10.1103/physreva.67.061201

Cited by 61 publications

(39 citation statements)

References 27 publications

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“…In particular, cluster excitation with (i) stretched pulses having an optimal duration or with (ii) dual pulses having an optimal delay substantially support the generation of highly charged, energetic ions [14][15][16][17] and fast electrons [18,19]. At optimal pulse length, ion recoil energies can be further increased by (iii) introducing a weak additional shoulder in the leading edge of the laser pulse [20] or by (iv) using a negative pulse chirp [21].…”

Section: Introductionmentioning

confidence: 99%

Optimal control of the strong-field ionization of silver clusters in helium droplets

et al. 2010

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Optimal control techniques combined with femtosecond laser pulse shaping are applied to steer and enhance the strong-field induced emission of highly charged atomic ions from silver clusters embedded in helium nanodroplets. With light fields shaped in amplitude and phase we observe a substantial increase of the Ag q+ yield for q > 10 when compared to bandwidth-limited and optimally stretched pulses. A remarkably simple double-pulse structure, containing a low-intensity prepulse and a stronger main pulse, turns out to produce the highest atomic charge states up to Ag 20+ . A negative chirp during the main pulse hints at dynamic frequency locking to the cluster plasmon. A numerical optimal control study on pure silver clusters with a nanoplasma model converges to a similar pulse structure and corroborates that the optimal light field adapts to the resonant excitation of cluster surface plasmons for efficient ionization.

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Section: Introductionmentioning

confidence: 99%

Optimal control of the strong-field ionization of silver clusters in helium droplets

et al. 2010

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“…stretched pulses [4,6,8,15], pumpprobe techniques [17,18,19,20], and multi-parameter pulse shaping [5,21]. Typically, resonant plasmon excitations lead to the emission of laser aligned energetic electrons [6,7,9] and highly charged atomic ions with high kinetic energy [8,20]. Whereas the effect of resonance heating in homogenous clusters is relatively well understood [22], there is an ongoing debate on how the possibility of multiple plasmon resonances in core-shell systems affects the interaction dynamics and the final emission spectra.…”

Section: Introductionmentioning

confidence: 99%

“…Control of the absorption [17] and the emission characteristics by the pulse structure has been demonstrated with various schemes, e.g. stretched pulses [4,6,8,15], pumpprobe techniques [17,18,19,20], and multi-parameter pulse shaping [5,21]. Typically, resonant plasmon excitations lead to the emission of laser aligned energetic electrons [6,7,9] and highly charged atomic ions with high kinetic energy [8,20].…”

Section: Introductionmentioning

confidence: 99%

“…Strong enhancements in the energy, yield, or charge states of emitted species [6,7,8,15] can be achieved with laser fields that induce resonant collective heating of nanoplasma electrons (Mie plasmon resonance). When present, the plasmon resonance is typically stronger than additional higher-order nonlinear resonance effects [16].…”

Section: Introductionmentioning

confidence: 99%

“…Under intense near-infrared laser pulses (λ ∼ 800 nm), the transition of gas-phase clusters into well-isolated finite nanoplasmas results in high energy absorption, rapid cluster explosion, and the emission of highly charged ions [3,4,5], fast electrons [6,7,8,9], and energetic photons from the vacuum ultraviolet up to the x-ray range [10,11,12,13,14]. Because of the opportunity to study the underlying ionization, heating, and decay mechanisms in a nearly background-free environment, intense laser-cluster interactions are of high interest also for various other fields ranging from plasma physics to applied laser-matter research.…”

Section: Introductionmentioning

confidence: 99%

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Resonant charging of Xe clusters in helium nanodroplets under intense laser fields

Peltz

Fennel

2011

Eur. Phys. J. D

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Abstract. We theoretically investigate the impact of multiple plasmon resonances on the charging of Xe clusters embedded in He nanodroplets under intense pump-probe laser excitation (τ = 25 fs, I0 = 2.5 × 10 14 W/cm 2 , λ = 800 nm). Our molecular dynamics simulations on Xe309He10000 and comparison to results for free Xe309 give clear evidence for selective resonance heating in the He shell and the Xe cluster, but no corresponding double hump feature in the final Xe charge spectra is found. Though the presence of the He shell substantially increases the maximum charge states, the pump-probe dynamics of the Xe spectra from the embedded system is similar to that of the free species. In strong contrast to that, the predicted electron spectra do show well-separated and pronounced features from highly efficient plasmon assisted electron acceleration for both resonances in the embedded clusters. A detailed analysis of the underlying ionization and recombination dynamics is presented and explains the apparent disaccord between the resonance features in the ion and electron spectra.

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Amplification of a high-frequency wave by IR-field-heatedclusters

Korneev

Becker²

2010

Laser Phys. Lett.

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The nonequilibrium nanoplasma created by irradiation of a cluster, or other nanosystems such as large molecules, with an intense infrared-laser field may be used as an amplifying medium for a high-frequency probe field. We employ a simple description where the nanosystem is modeled by particles bound by a self-consitent potential. An incident probe field suffers gain or loss depending on the respective parameters by a mechanism that is usually referred to as collisionless damping. The model is simple enough to allow for an essentially analytical solution. Absorption rate of the nonequilibrium cluster. Negative absorption corresponds to amplification. See text below for further explanations

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Optimized energetic particle emissions from Xe clusters in intense laser fields

Cited by 61 publications

References 27 publications

Optimal control of the strong-field ionization of silver clusters in helium droplets

Optimal control of the strong-field ionization of silver clusters in helium droplets

Resonant charging of Xe clusters in helium nanodroplets under intense laser fields

Amplification of a high-frequency wave by IR-field-heatedclusters

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