Thermal diffusivity determination using heterodyne phase insensitive transient grating spectroscopy

Dennett, Cody A.; Short, Michael P.

doi:10.1063/1.5026429

Cited by 31 publications

(24 citation statements)

References 29 publications

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“…The experimental techniques are undergoing further developments. Among them, further refinements of the heterodyne detection [93,94] and a technique which allows a continuous tuning of the periodicity λ ∥ [95]. Among recent developments, the coherent space and time control of the relative phases of the interference patterns generated by successive laser pulses, which enables the control the periodic surface deformation induced by the pump pulses, which is also monitored by time-resolved X-ray reflectivity [96], and the exploitation of femtosecond pulses of extreme ultraviolet light (12.7 nm) to obtain surface periodicities λ ∥ of 280 nm [97].…”

Section: Transient Grating Spectroscopymentioning

confidence: 99%

Ultrasonic and Spectroscopic Techniques for the Measurement of the Elastic Properties of Nanoscale Materials

Beghi¹

2021

Nanomechanics - Theory and Application

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Materials at the nanoscale often have properties which differ from those they have in the bulk form. These properties significantly depend on the production process, and their measurement is not trivial. The elastic properties characterize the ability of materials to deform in a reversible way; they are of interest by themselves, and as indicators of the type of nanostructure. As for larger scale samples, the measurement of the elastic properties is more straightforward, and generally more precise, when it is performed by a deformation process which involves exclusively reversible strains. Vibrational and ultrasonic processes fulfill this requirement. Several measurement techniques have been developed, based on these processes. Some of them are suitable for an extension towards nanometric scales. Until truly supramolecular scales are reached, the elastic continuum paradigm remains appropriate for the description and the analysis of ultrasonic regimes. Some techniques are based on the oscillations of purpose-built testing structures, mechanically actuated. Other techniques are based on optical excitation and/or detection of ultrasonic waves, and operate either in the time domain or in the frequency domain. A comparative overview is given of these various techniques.

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Section: Transient Grating Spectroscopymentioning

confidence: 99%

Ultrasonic and Spectroscopic Techniques for the Measurement of the Elastic Properties of Nanoscale Materials

Beghi¹

2021

Nanomechanics - Theory and Application

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“…4. There are a number of examples for this, 13,15,16,22 with custom routines in MATLAB frequently being used to do the fitting.…”

Section: The Transient Grating Spectroscopy Setupmentioning

confidence: 99%

Non-contact, non-destructive mapping of thermal diffusivity and surface acoustic wave speed using transient grating spectroscopy

Reza

Dennett

Short

et al. 2020

Review of Scientific Instruments

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We present new developments of the laser-induced transient grating spectroscopy (TGS) technique that enable the measurement of large area 2D maps of thermal diffusivity and surface acoustic wave speed. Additional capabilities include targeted measurements and the ability to accommodate samples with increased surface roughness. These new capabilities are demonstrated by recording large TGS maps of deuterium implanted tungsten, linear friction welded aerospace alloys, and high entropy alloys with a range of grain sizes. The results illustrate the ability to view the grain microstructure in elastically anisotropic samples and to detect anomalies in samples, for example, due to irradiation and previous measurements. They also point to the possibility of using TGS to quantify grain size at the surface of polycrystalline materials.

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“…where A and B are proportionality constants and q is the grating wave vector fitting approach that takes both relaxation dynamics into account, treating the ratio of their relative contributions as a free parameter (43).…”

Section: )mentioning

confidence: 99%

“…This is key for enabling in situ measurements of evolving systems, as well as the mapping of larger areas. Reprinted from Dennett et al (43), with the permission of AIP Publishing.…”

Section: )mentioning

confidence: 99%

Transient grating spectroscopy: An ultrarapid, nondestructive materials evaluation technique

2019

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Structure-property relationships are the foundation of materials science.Linking microstructure and material properties is essential for predicting material response to driving forces, managing in-service material degradation, and engineering materials for optimal performance. Elastic, thermal, and acoustic properties provide a convenient gateway to directly or indirectly probe material structure across multiple length scales. We review how using the laser-induced transient grating spectroscopy (TGS) technique, which uses a transient diffraction grating to generate surface acoustic waves (SAWs) and temperature gratings on a material surface, non-destructively reveals the material's elasticity, thermal diffusivity, and energy dissipation on the sub-microsecond timescale, within a tunable sub-surface depth. This technique has already been applied to many challenging problems in materials characterization, from analysis of radiation damage, to colloidal crystals, to phonon-mediated thermal transport in nanostructured systems, to crystal orientation and lattice parameter determination.Examples of these applications, as well as inferring aspects of microstructural evolution, illustrate the wide potential reach of TGS to solve old materials challenges, and to uncover new science. We conclude by looking ahead at the tremendous potential of TGS for materials discovery and optimization when applied in situ to dynamically evolving systems.

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Thermal diffusivity determination using heterodyne phase insensitive transient grating spectroscopy

Cited by 31 publications

References 29 publications

Ultrasonic and Spectroscopic Techniques for the Measurement of the Elastic Properties of Nanoscale Materials

Ultrasonic and Spectroscopic Techniques for the Measurement of the Elastic Properties of Nanoscale Materials

Non-contact, non-destructive mapping of thermal diffusivity and surface acoustic wave speed using transient grating spectroscopy

Transient grating spectroscopy: An ultrarapid, nondestructive materials evaluation technique

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