Abnormal ripple patterns with enhanced regularity and continuity in a bulk metallic glass induced by femtosecond laser irradiation

Zhang, W.; Cheng, Guanghua; Hui, Xidong; Feng, Qiang

doi:10.1007/s00339-013-8062-z

Cited by 24 publications

(10 citation statements)

References 22 publications

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“…A Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 Be 25.5 (atom%) metallic superalloy undercooled to a glassy structure (bulk metallic glass, BMG) 25 , 26 is used for laser nanostructuring, in the conditions where its thermoplasticity above the glass transition temperature can render high quality LIPSS 24 , 27 . Single-side polished Zr-BMG samples (Ra < 20 nm) with a diameter of 8 mm and a thickness of 3 mm were used in the experiment.…”

Section: Resultsmentioning

confidence: 99%

“…The material choice is motivated the quality of ripples formation. The LIPSS alignment, which suffers often from periodicity errors and bifurcations believed to originate from self-organizational dynamics 23 , has a particular quality in laser irradiated metallic glasses 24 . In the ripple development we indicate the action range of two types of optical feedback; one related to surface topography (scattering and localization at inhomogeneities) and the second determined by the self-driven coherent interactions between driving and scattered light at constant relative phase.…”

Section: Introductionmentioning

confidence: 99%

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In-situ high-resolution visualization of laser-induced periodic nanostructures driven by optical feedback

Aguilar

Mauclair

Faure

et al. 2017

Sci Rep

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Optical feedback is often evoked in laser-induced periodic nanostructures. Visualizing the coupling between surfaces and light requires highly-resolved imaging methods. We propose in-situ structured-illumination-microscopy to observe ultrafast-laser-induced nanostructures during fabrication on metallic glass surfaces. This resolves the pulse-to-pulse development of periodic structures on a single irradiation site and indicates the optical feedback on surface topographies. Firstly, the quasi-constancy of the ripples pattern and the reinforcement of the surface relief with the same spatial positioning indicates a phase-locking mechanism that stabilizes and amplifies the ordered corrugation. Secondly, on sites with uncorrelated initial corrugation, we observe ripple patterns spatially in-phase. These feedback aspects rely on the electromagnetic interplay between the laser pulse and the surface relief, stabilizing the pattern in period and position. They are critically dependent on the space-time coherence of the exciting pulse. This suggests a modulation of energy according to the topography of the surface with a pattern phase imposed by the driving pulse. A scattering and interference model for ripple formation on surfaces supports the experimental observations. This relies on self-phase-stabilized far-field interaction between surface scattered wavelets and the incoming pulse front.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In-situ high-resolution visualization of laser-induced periodic nanostructures driven by optical feedback

Aguilar

Mauclair

Faure

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The feedback is active on two levels, a topography driven effect acting pulse by pulse and a transient effect of spatially selective optical properties during the exposure. Accurate control of feedback results then in the generation of highly regular structures and patterns where light and matter mobility and flow are synergetically synchronized [87,88]. The latter acquires a significant importance in the order quality of the structures.…”

Section: Focal Engineering and Near-field Processing: Sub-wavelength mentioning

confidence: 99%

Advances in ultrafast laser structuring of materials at the nanoscale

2020

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Laser processing implies the generation of a material function defined by the shape and the size of the induced structures, being a collective effect of topography, morphology, and structural arrangement. A fundamental dimensional limit in laser processing is set by optical diffraction. Many material functions are yet defined at the micron scale, and laser microprocessing has become a mainstream development trend. Consequently, laser microscale applications have evolved significantly and developed into an industrial grade technology. New opportunities will nevertheless emerge from accessing the nanoscale. Advances in ultrafast laser processing technologies can enable unprecedented resolutions and processed feature sizes, with the prospect to bypass optical and thermal limits. We will review here the mechanisms of laser processing on extreme scales and the optical and material concepts allowing us to confine the energy beyond the optical limits. We will discuss direct focusing approaches, where the use of nonlinear and near-field effects has demonstrated strong capabilities for light confinement. We will argue that the control of material hydrodynamic response is the key to achieve ultimate resolution in laser processing. A specific structuring process couples both optical and material effects, the process of self-organization. We will discuss the newest results in surface and volume self-organization, indicating the dynamic interplay between light and matter evolution. Micron-sized and nanosized features can be combined into novel architectures and arrangements. We equally underline a new dimensional domain in processing accessible now using laser radiation, the sub-100-nm feature size. Potential application fields will be indicated as the structuring sizes approach the effective mean free path of transport phenomena.

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“…Femtosecond pulsed laser irradiation (FSPLI) is a powerful technique to induce periodic topological patterning and concomitant ablation damage at the surface of certain metallic alloys, semiconductors, dielectrics and polymers [14][15][16][17][18][19][20][21][22][23][24]. Depending on the laser processing conditions (fluence and nominal number of pulses) the imprinted structures can change from low-spatial-frequency ripples or "classical ripples" with periodicity close to the laser light (perpendicular to the polarization of the incident laser beam) [9,10] to high-spatial-frequency nanoripples with periodicity smaller than laser wavelength (either perpendicular or parallel to the polarization direction [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the laser processing conditions (fluence and nominal number of pulses) the imprinted structures can change from low-spatial-frequency ripples or "classical ripples" with periodicity close to the laser light (perpendicular to the polarization of the incident laser beam) [9,10] to high-spatial-frequency nanoripples with periodicity smaller than laser wavelength (either perpendicular or parallel to the polarization direction [17][18][19]. Even spikes [20], regular arrays of nanopores [21] or concentric rings [22] can be induced under certain circumstances. Several models have been put forward in the literature to account for the various types of ripple topologies.…”

Section: Introductionmentioning

confidence: 99%

Sub-micron magnetic patterns and local variations of adhesion force induced in non-ferromagnetic amorphous steel by femtosecond pulsed laser irradiation

Zhang

Yun

Nieto

et al. 2016

Applied Surface Science

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This is the author's version of a work that was accepted for publication in Applied surface science (Ed. Elsevier). Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Zhang, H. et al. "Submicron magnetic patterns and local variations of adhesion force induced in non-ferromagnetic amorphous steel by femtosecond pulsed laser irradiation" in

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Abnormal ripple patterns with enhanced regularity and continuity in a bulk metallic glass induced by femtosecond laser irradiation

Cited by 24 publications

References 22 publications

In-situ high-resolution visualization of laser-induced periodic nanostructures driven by optical feedback

In-situ high-resolution visualization of laser-induced periodic nanostructures driven by optical feedback

Advances in ultrafast laser structuring of materials at the nanoscale

Sub-micron magnetic patterns and local variations of adhesion force induced in non-ferromagnetic amorphous steel by femtosecond pulsed laser irradiation

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