Material characterisation with methods of nonlinear optics

Prylepa, Andrii; Reitböck, Cornelia; Cobet, Munise; Jesacher, Alexander; Jin, Xigao; Adelung, Rainer; Schatzl-Linder, Michaela; Luckeneder, Gerald; Stellnberger, Karl-Heinz; Steck, T.; Faderl, Josef; Stehrer, T.; Stifter, David

doi:10.1088/1361-6463/aa9df4

Cited by 17 publications

(13 citation statements)

References 91 publications

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“…Nonlinear optical (NLO) phenomena such as harmonic generation, Kerr, and Pockels effects are of great technological importance for lasers, frequency converters, modulators, etc. In addition, NLO spectroscopy has been extensively employed to obtain insight into materials properties [119] that are not accessible by e.g. linear optical spectroscopy.…”

Section: Second Harmonics Generationmentioning

confidence: 99%

Recent progress of the Computational 2D Materials Database (C2DB)

Gjerding¹,

Taghizadeh²,

Rasmussen³

et al. 2021

2D Mater.

340

251

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The Computational 2D Materials Database (C2DB) is a highly curated open database organising a wealth of computed properties for more than 4000 atomically thin two-dimensional (2D) materials. Here we report on new materials and properties that were added to the database since its first release in 2018. The set of new materials comprise several hundred monolayers exfoliated from experimentally known layered bulk materials, (homo)bilayers in various stacking configurations, native point defects in semiconducting monolayers, and chalcogen/halogen Janus monolayers. The new properties include exfoliation energies, Bader charges, spontaneous polarisations, Born charges, infrared polarisabilities, piezoelectric tensors, band topology invariants, exchange couplings, Raman spectra and second harmonic generation spectra. We also describe refinements of the employed material classification schemes, upgrades of the computational methodologies used for property evaluations, as well as significant enhancements of the data documentation and provenance. Finally, we explore the performance of Gaussian process-based regression for efficient prediction of mechanical and electronic materials properties. The combination of open access, detailed documentation, and extremely rich materials property data sets make the C2DB a unique resource that will advance the science of atomically thin materials.

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Section: Second Harmonics Generationmentioning

confidence: 99%

Recent progress of the Computational 2D Materials Database (C2DB)

Gjerding¹,

Taghizadeh²,

Rasmussen³

et al. 2021

2D Mater.

340

251

View full text Add to dashboard Cite

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“…1(c). This can be interpreted as a continuous process of IR absorption and anti-Stokes Raman scattering [1,2,34,35].…”

Section: Theorymentioning

confidence: 99%

“…, where 0  is the vacuum permittivity,   (1) is the firstorder linear polarizability, and  E is the intensity of the corresponding electric field [1,2]. The first ruby laser developed in 1960 enabled the development and growth of SFG vibrational spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Applications of sum-frequency generation vibrational spectroscopy in friction interface

Liu

Zhang

et al. 2021

Friction

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Sum-frequency generation (SFG) vibrational spectroscopy is a second-order nonlinear optical spectroscopy technique. Owing to its interfacial selectivity, SFG vibrational spectroscopy can provide interfacial molecular information, such as molecular orientations and order, which can be obtained directly, or molecular density, which can be acquired indirectly. Interfacial molecular behaviors are considered the basic factors for determining the tribological properties of surfaces. Therefore, owing to its ability to detect the molecular behavior in buried interfaces in situ and in real time, SFG vibrational spectroscopy has become one of the most appealing technologies for characterizing mechanisms at friction interfaces. This paper briefly introduces the development of SFG vibrational spectroscopy and the essential theoretical background, focusing on its application in friction and lubrication interfaces, including film-based, complex oil-based, and water-based lubricating systems. Real-time detection using SFG promotes the nondestructive investigation of molecular structures of friction interfaces in situ with submonolayer interface sensitivity, enabling the investigation of friction mechanisms. This review provides guidance on using SFG to conduct friction analysis, thereby widening the applicability of SFG vibrational spectroscopy.

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“…Regarding thin films, the optical investigation of domain walls remains challenging due to the optical resolution limit and the limited SHG active domain wall volume. Recent progress dealing with laser-scanning SHG microscopy [128] and near-field SHG nano-imaging [129,130] where tip-enhanced SHG signals are collected with a spatial resolution approaching the submicron range [131,132] has been achieved and opens new avenues towards the symmetry analysis of nanoscale objects.…”

Section: Remaining Challenges In 3d Resolution In Thin Filmsmentioning

confidence: 99%

Probing Ferroic States in Oxide Thin Films Using Optical Second Harmonic Generation

et al. 2018

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Forthcoming low-energy consumption oxide electronics rely on the deterministic control of ferroelectric and multiferroic domain states at the nanoscale. In this review, we address the recent progress in the field of investigation of ferroic order in thin films and heterostructures, with a focus on non-invasive optical second harmonic generation (SHG). For more than 50 years, SHG has served as an established technique for probing ferroic order in bulk materials. Here, we will survey the specific new aspects introduced to SHG investigation of ferroelectrics and multiferroics by working with thin film structures. We show how SHG can probe complex ferroic domain patterns non-invasively and even if the lateral domain size is below the optical resolution limit or buried beneath an otherwise impenetrable cap layer. We emphasize the potential of SHG to distinguish contributions from individual (multi-) ferroic films or interfaces buried in a device or multilayer architecture. Special attention is given to monitoring switching events in buried ferroic domain-and domain-wall distributions by SHG, thus opening new avenues towards the determination of the domain dynamics. Another aspect studied by SHG is the role of strain. We will finally show that by integrating SHG into the ongoing thin film deposition process, we can monitor the emergence of ferroic order and properties in situ, while they emerge during growth. Our review closes with an outlook, emphasizing the present underrepresentation of ferroic switching dynamics in the study of ferroic oxide heterostructures.

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Material characterisation with methods of nonlinear optics

Cited by 17 publications

References 91 publications

Recent progress of the Computational 2D Materials Database (C2DB)

Recent progress of the Computational 2D Materials Database (C2DB)

Applications of sum-frequency generation vibrational spectroscopy in friction interface

Probing Ferroic States in Oxide Thin Films Using Optical Second Harmonic Generation

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