Coherent Phonon Generation and Detection by Picosecond Light Pulses

Thomsen, C.; Strait, Jared H.; Vardeny, Z.V.; Maris, Humphrey J.; Tauc, J.; Hauser, J. J.

doi:10.1103/physrevlett.53.989

Cited by 506 publications

(406 citation statements)

References 5 publications

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“…The observation of this spatio-temporal elongation has not been reported in most time-domain optical [8][9][10]13 or TRXRD studies 16,24 . Part of this spatial dilation is likely due to the sound speed difference in gold (∼3300 m/s) versus germanium (∼5400 m/s), which results in spatially stretching the acoustic pulse by almost a factor of two.…”

Section: Strain Reconstructionmentioning

confidence: 90%

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Reconstructing longitudinal strain pulses using time-resolved x-ray diffraction

et al. 2013

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Time-resolved x-ray diffraction is a very powerful tool for visualizing transient one-dimensional crystalline strains, ranging from crystal growth to shockwave production. In this work, we use picosecond x-ray diffraction to visualize transient strain formation from nanometer scaled laser excited gold films into crystalline substrates. We show that there is a direct correspondence between the measured time-resolved x-ray diffraction pattern and the transient acoustic wave, providing a straightforward method to make a reconstruction of the transient strain. In addition, we discuss real-world experimental constraints that place limits on the validity of the reconstructed transient acoustic wave.

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Section: Strain Reconstructionmentioning

confidence: 90%

“…The central wavelength of this strain pulse can be as small as a few nanometers, providing a method to directly image of nanometer scale structures and biomaterials 7,8 . Direct comparisons of theoretical models with experiments can lead to an understanding of electron-phonon interactions and thermal properties of materials 1,[9][10][11][12][13][14][15][16] .…”

mentioning

confidence: 99%

Reconstructing longitudinal strain pulses using time-resolved x-ray diffraction

et al. 2013

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“…Plasmons are effective for localizing light in a subwavelength volume and are ideal candidates for manipulating nanoscale mechanical motion because of their large absorption cross-sections, subwavelength field localization and high sensitivity to geometry and refractive index changes. This efficient absorption makes the plasmon an effective transducer of far-field radiation into phonons 5 : the plasmonic nanostructure absorbs energy from the laser pulse and rapidly expands, generating coherent acoustic phonons through impulsive thermal excitation [11][12][13][14] . When a metallic nanostructure first absorbs an ultrashort laser pulse, a localized surface plasmon, a coherent oscillation of electrons, is excited.…”

mentioning

confidence: 99%

“…The generation, detection and control of ultrahigh frequency phonons have been a topic of intense research [5][6][7][8][9][10] . Plasmons are effective for localizing light in a subwavelength volume and are ideal candidates for manipulating nanoscale mechanical motion because of their large absorption cross-sections, subwavelength field localization and high sensitivity to geometry and refractive index changes.…”

mentioning

confidence: 99%

Ultrafast acousto-plasmonic control and sensing in complex nanostructures

et al. 2014

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Coherent acoustic phonons modulate optical, electronic and mechanical properties at ultrahigh frequencies and can be exploited for applications such as ultratrace chemical detection, ultrafast lasers and transducers. Owing to their large absorption cross-sections and high sensitivities, nanoplasmonic resonators are used to generate coherent phonons up to terahertz frequencies. Generating, detecting and controlling such ultrahigh frequency phonons has been a topic of intense research. Here we report that by designing plasmonic nanostructures exhibiting multimodal phonon interference, we can detect the spatial properties of complex phonon modes below the optical wavelength through the interplay between plasmons and phonons. This allows detection of complex nanomechanical dynamics by polarization-resolved transient absorption spectroscopy. Moreover, we demonstrate that the multiple vibrational states in nanostructures can be tailored by manipulating the geometry and dynamically selected by acousto-plasmonic coherent control. This allows enhancement, detection and coherent generation of tunable strains using surface plasmons.

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“…The picosecond ultrasonic technique [1] was developed during last 20 years due to permanent interest in the study of mechanical and thermal properties of structures of metals and semiconductors in nano and micro domains used essentially in solid state physics and microelectronics. This technique relies on generation and detection of nanometric ultra-short acoustic waves by the use of femtosecond laser pulses and it is based on the well-known pump-probe technique.…”

Section: Introductionmentioning

confidence: 99%

In Vitro picosecond ultrasonics in a single cell

Rossignol¹,

Chigarev²,

Ducousso³

et al. 2008

Applied Physics Letters

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The picosecond ultrasonic technique is applied for the non-invasive evaluation of sound velocity at a submicron scale in living onion cells. Velocity and attenuation of hypersound in cells are measured by a femtosecond laser pump-probe technique. A nanometric co-polymer layer deposited between the cell and the substrate has been used to improve the photoacoustic signal. Comparison of the measured signals with the photoacoustic responses calculated according to thermoelastic generation mechanism and reflectometric detection shows high sensitivity to the cell adhesion on substrate. Measurements achieved in different vegetal cells illustrate the sensitivity of the technique. In addition to single cell imaging with the high lateral resolution provided by optics (ie ≈1µm), the sensitivity of the measurements to cell compressibility suggests promising perspectives in the field of biology

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Coherent Phonon Generation and Detection by Picosecond Light Pulses

Cited by 506 publications

References 5 publications

Reconstructing longitudinal strain pulses using time-resolved x-ray diffraction

Reconstructing longitudinal strain pulses using time-resolved x-ray diffraction

Ultrafast acousto-plasmonic control and sensing in complex nanostructures

In Vitro picosecond ultrasonics in a single cell

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