Time- and Space-Resolved Optical Probing of Femtosecond-Laser-Driven Shock Waves in Aluminum

Evans, R. G.; Badger, A; Falliès, F.; Mahdieh, M.; Hall, Tom; Audebert, P.; Geindre, J. P.; Gauthier, J. C.; Mysyrowicz, A.; Grillon, G.; Antonetti, A.

doi:10.1103/physrevlett.77.3359

Cited by 141 publications

(79 citation statements)

References 22 publications

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“…Prior work using compressed ϳ150 fs duration laser pulses have generated shocks in films of 0.250-1.0 m thickness and observed only a single wave. [8][9][10][11] Molecular dynamic models on metals, however, suggest that the transition from elastic to plastic deformation response may occur on micron length scales and picosecond time scales. [12][13][14] Using a shaped chirped-pulse amplified ultrafast laser to generate supported shocks ͑to be discussed later͒, we have successfully generated and measured both elastic and plastic waves in aluminum films ranging from 2 -8 m thick.…”

Section: Introductionmentioning

confidence: 99%

The elastic-plastic response of aluminum films to ultrafast laser-generated shocks

Whitley

McGrane

Eakins

et al. 2011

Journal of Applied Physics

140

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We present the free surface response of 2, 5, and 8 m aluminum films to shocks generated from chirped ultrafast lasers. We find two distinct steps to the measured free surface velocity that indicate a separation of the faster elastic wave from the slower plastic wave. We resolve the separation of the two waves to times as short as 20 ps. We measured peak elastic free surface velocities as high as 1.4 km/s corresponding to elastic stresses of 12 GPa. The elastic waves rapidly decay with increasing sample thickness. The magnitude of both the elastic wave and the plastic wave and the temporal separation between them was strongly dependent on the incident laser drive energy.

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Section: Introductionmentioning

confidence: 99%

The elastic-plastic response of aluminum films to ultrafast laser-generated shocks

Whitley

McGrane

Eakins

et al. 2011

Journal of Applied Physics

140

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“…The compression time must be at least the time required for the sample to reach the final, equilibrated thermodynamic state plus the time required to characterize that state, and we may define a measurement efficiency for compression experiments as the ratio of the Further, measurements of wave speeds have been demonstrated in many cases with sub-10 ps time resolution [7][8][9][10]12 , and, in conventional experiments, with sub-100 ps time resolution 3,6 .…”

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confidence: 99%

“…Historically, shock wave experiments use compression times much longer than a nanosecond, which is a typical time resolution. Within the last two decades, methods to characterize shock waves with picosecond time resolution have been developed [7][8][9][10][11] , resulting in the measurement of enormous elastic compression on short time scales [12][13][14] , and the measurement of a tens of picosecond scale plastic shock rise time in aluminum 12 . These experiments require orders of magnitude less compression energy than longer time scale experiments to obtain and characterize comparable thermodynamic conditions, because the volume of compressed material is much smaller (i.e.…”

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confidence: 99%

Prospects for achieving high dynamic compression with low energy

Armstrong

Crowhurst

Bastea

et al. 2012

Applied Physics Letters

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Laser driven dynamic compression experiments may, in materials with picosecond equilibration times, be possible with orders of magnitude less drive energy than currently used. As we show, the compression energy for geometrically similar experiments varies as the third power of the time scale of compression. For materials which equilibrate and can be characterized on picosecond time scales, the compression energy can be orders of magnitude smaller than the 1–100 ns scale time scale of many current experiments. The use of substantially lower compression energy is a great practical advantage in such experiments, potentially enabling the observation of extreme states of matter with table top scale laser systems.

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“…The shocks were driven into the aluminium films, in the manner of Evans et al (9), by the deposition of laser light from a chirped pulse amplified Ti:sapphire laser. The pulses from this laser are ca.…”

Section: Methodsmentioning

confidence: 99%

Time- and space-resolved optical probing of the shock rise time in thin aluminum films

Moore¹,

Gahagan²,

Buelow³

et al. 2000

AIP Conference Proceedings

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Abstract. The time resolution of most common methods (various forms of interferometry, e.g. VISAR, Fabry-Perot, ORVIS) used to measure the free surface particle velocity as a shock exits from a shocked material is from a few ns down to about 200 ps. Dlott et al. have recently obtained a shock rise time resolution of about 25 ps using a method involving singular value decomposition of coherent antiStokes Raman (CARS) spectra from thin film nanogauges. We are using frequency domain interferometric methods utilizing 120 fs pulses from a chirped-pulse amplified Ti:sapphire laser to measure the particle velocity rise time as a shock (driven by ca. 0.5 mJ pulses focussed to 75 µm diameter) exits the free surface of 0.5-2 µm aluminium films on thin glass substrates, following the example of Evans, et al. Some preliminary results of these investigations are reported.

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Time- and Space-Resolved Optical Probing of Femtosecond-Laser-Driven Shock Waves in Aluminum

Cited by 141 publications

References 22 publications

The elastic-plastic response of aluminum films to ultrafast laser-generated shocks

The elastic-plastic response of aluminum films to ultrafast laser-generated shocks

Prospects for achieving high dynamic compression with low energy

Time- and space-resolved optical probing of the shock rise time in thin aluminum films

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