Cavitation dynamics and directional microbubble ejection induced by intense femtosecond laser pulses in liquids

Faccio, Daniele; Tamošauskas, G.; Rubino, E.; Darginavičius, J.; Papazoglou, D. G.; Tzortzakis, S.; Couairon, Arnaud; Dubietis, A.

doi:10.1103/physreve.86.036304

Cited by 33 publications

(24 citation statements)

References 40 publications

(60 reference statements)

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“…These processes can cause intensity-clamping, which stops the intensity from exceeding I $ 10 13 Wcm À2 [37], and limits the number of reactive species available for reduction [20]. In contrast, tight-focusing (high-NA) geometries, simultaneous spatial and temporal focusing (SSTF) [71], or spatial beam-shaping [72] can avoid excessive filamentation and intensity clamping. In Au nanoparticle synthesis, tight-focusing [14,16,18] and SSTF [15,19,20], where the frequency components of the laser pulse are spatially separated prior to focusing, have both been used for this purpose.…”

Section: Focusing-geometrymentioning

confidence: 99%

Au Nanoparticle Synthesis Via Femtosecond Laser-Induced Photochemical Reduction of [AuCl4]−

John¹,

Meader²,

MooreTibbetts³

2018

Photochemistry and Photophysics - Fundamentals to Applications

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Laser-assisted metallic nanoparticle synthesis is a versatile "green" method that has become a topic of active research. This chapter discusses the photochemical reaction mechanisms driving AuCl 4 ½ À reduction using femtosecond-laser irradiation, and reviews recent advances in Au nanoparticle size-control. We begin by describing the physical processes underlying the interactions between laser pulses and the condensed media, including optical breakdown and supercontinuum emission. These processes produce a highly reactive plasma containing free electrons, which reduce AuCl 4 ½ À , and radical species producing H 2 O 2 that cause autocatalytic growth of Au nanoparticles. Then, we discuss the reduction kinetics of AuCl 4 ½ À , which follow an autocatalytic rate law in which the first-and second-order rate constants depend on free electrons and H 2 O 2 availability. Finally, we explain strategies to control the size of gold nanoparticles as they are synthesized; including modifications of laser parameters and solution compositions.

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Section: Focusing-geometrymentioning

confidence: 99%

Au Nanoparticle Synthesis Via Femtosecond Laser-Induced Photochemical Reduction of [AuCl4]−

John¹,

Meader²,

MooreTibbetts³

2018

Photochemistry and Photophysics - Fundamentals to Applications

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“…Filaments generated inside water will confine the free electrons to longer distances increasing the propagation of generated high pressures and ice VII over 2-6 Z R in the medium [16]. Though the filament propagation leading to a cavitation bubble is well studied during fs pulse water interaction [13,14,29], no clear observation of phase transitions was reported as the major processes leading to dynamic arrangement of an H-bond network, electron-ion energy transfer leading phase transition occur over longer (ps) time scales.…”

mentioning

confidence: 98%

Onset of ice VII phase of liquid water: role of filamentation in stimulated Raman scattering

Kumar

Kiran

2015

Opt. Lett.

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Energy dependent evolution of Stokes and anti-Stokes lines of ice VII via forward stimulated Raman scattering (FSRS) during propagation of a 30 ps laser pulse through liquid water, confirming structural change over GPa pressure range, is studied. Self-focusing of the intense laser pulses is observed to ionize the medium generating free electrons that dominate the evolution of SRS signals. The confinement of plasma-generated free electrons by filamentation is observed to enhance the signature Raman modes of ice VII by reducing the SRS threshold.

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“…Annular beams, prepared with an annular pupil filter, have also shown to improve spatial resolution in the focal plane, demonstrating applications in two-photon microscopy [26]. Another approach, which introduces minimum energy losses to the beam, is the use of an axicon [27].…”

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confidence: 99%

Extreme-ultraviolet high-order harmonic generation from few-cycle annular beams

2018

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An annular infrared (IR) laser beam has been used for highorder harmonic generation reaching a cut-off energy of 90 eV for extreme-ultraviolet-infrared (XUV-IR) pumpprobe experiments in an intrinsically stable attosecond beamline. The generation of harmonics along the laser axis in the missing portion of the laser beam decreases the IR power load on thin metallic foils that are used for removing the residual IR and shaping the XUV pulses from highharmonic generation. This finds applications in high-averagepower few-cycle laser systems, where high-average IR power destroys the foils. The spatial separation of IR and XUV will, moreover, simplify the realization of attosecond time-resolved measurements.

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Cavitation dynamics and directional microbubble ejection induced by intense femtosecond laser pulses in liquids

Cited by 33 publications

References 40 publications

Au Nanoparticle Synthesis Via Femtosecond Laser-Induced Photochemical Reduction of [AuCl4]−

Au Nanoparticle Synthesis Via Femtosecond Laser-Induced Photochemical Reduction of [AuCl4]−

Onset of ice VII phase of liquid water: role of filamentation in stimulated Raman scattering

Extreme-ultraviolet high-order harmonic generation from few-cycle annular beams

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