Gouy phase shift of single-cycle picosecond acoustic pulses

Holme, N. C. R.; Daly, Brian C.; Myaing, Mon Thiri; Norris, Theodore B.

doi:10.1063/1.1590405

Cited by 46 publications

(26 citation statements)

References 9 publications

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“…It can be demonstrated that the detection occurs in the far-field region which simplifies the analysis of the detection pattern. 35 The transition between the near-field and the far field occurs at the depth 36 …”

Section: B Imagery Methodsmentioning

confidence: 99%

“…As a consequence, the spatial extension of the pulse is doubled and the shape becomes unipolar. 19 During its propagation from the near field to the far field, the acoustic pulse transforms from a unipolar to a bipolar shape 35 which explains the antisymmetric shape of the detected echo. 19 We deduce that the experimental value R of the radius corresponds to the midpoint of the perturbation seen in surface.…”

Section: Appendix A: Analyzing Ripples From Surface Imagingmentioning

confidence: 99%

“…This bipolar strain can be explained by the generation, propagation, and detection process involving the acoustic pulse. 19,35 The thermoelastic generation of the pulse in the liquid Hg in contact with the diamond produces an unipolar and asymmetric strain profile. 19 Just after the generation, the acoustic pulse is immediately reflected at the diamond/mercury interface.…”

Section: Appendix A: Analyzing Ripples From Surface Imagingmentioning

confidence: 99%

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Equation of state of liquid mercury to 520 K and 7 GPa from acoustic velocity measurements

Ayrinhac

Gauthier

Bove

et al. 2014

The Journal of Chemical Physics

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The acoustic velocity, refractive index, and equation of state of liquid ammonia dihydrate under high pressure and high temperature J. Chem. Phys. 137, 104504 (2012) Ultrafast acoustics measurements on liquid mercury have been performed at high pressure and temperature in a diamond anvil cell using picosecond acoustic interferometry. We extract the density of mercury from adiabatic sound velocities using a numerical iterative procedure. We also report the pressure and temperature dependence of the thermal expansion, isothermal and adiabatic compressibility, bulk modulus, and pressure derivative of the latter up to 7 GPa and 520 K. We finally show that the sound velocity follows a scaling law as a function of density in the overall measured metallic state.

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Section: B Imagery Methodsmentioning

confidence: 99%

Section: Appendix A: Analyzing Ripples From Surface Imagingmentioning

confidence: 99%

Section: Appendix A: Analyzing Ripples From Surface Imagingmentioning

confidence: 99%

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Equation of state of liquid mercury to 520 K and 7 GPa from acoustic velocity measurements

Ayrinhac

Gauthier

Bove

et al. 2014

The Journal of Chemical Physics

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“…However, the absorbed optical power can raise the temperature of the sample so much that the attenuation is not negligible anymore. Moreover, the UAPs are also affected by diffraction [15,16]. However, previous experiments [2][3][4][5]7] mainly relied on the observation of discrete features propagating faster than the sound and whose velocities and numbers grow with initial UAP amplitude to sustain the existence of KdV solitons.…”

Section: Introductionmentioning

confidence: 99%

Acoustic solitons: A robust tool to investigate the generation and detection of ultrafast acoustic waves

et al. 2017

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Solitons are self-preserving traveling waves of great interest in nonlinear physics but hard to observe experimentally. In this report an experimental setup is designed to observe and characterize acoustic solitons in a GaAs(001) substrate. It is based on careful temperature control of the sample and an interferometric detection scheme. Ultrashort acoustic solitons, such as the one predicted by the Korteweg-de Vries equation, are observed and fully characterized. Their particlelike nature is clearly evidenced and their unique properties are thoroughly checked. The spatial averaging of the soliton wave front is shown to account for the differences between the theoretical and experimental soliton profile. It appears that ultrafast acoustic experiments provide a precise measurement of the soliton velocity. It allows for absolute calibration of the setup as well as the response function analysis of the detection layer. Moreover, the temporal distribution of the solitons is also analyzed with the help of the inverse scattering method. It shows how the initial acoustic pulse profile which gives birth to solitons after nonlinear propagation can be retrieved. Such investigations provide a new tool to probe transient properties of highly excited matter through the study of the emitted acoustic pulse after laser excitation.

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“…After this special nonlinear development, the pulses may again be used to excite embedded structures or surface layers on the other side of the crystal, or excite two-level systems. Finally, special far-field techniques are being developed to map out the diffraction of a reflected pulse from a nano-object [52], allowing for the full 2-dimensional reconstruction of the image.…”

Section: Coherent Phonons In Two-level Mediamentioning

confidence: 99%