Self-organized micro/nano structures in metal surfaces by ultrafast laser irradiation

Nayak, Barada K.; Gupta, Mool C.

doi:10.1016/j.optlaseng.2010.04.010

Cited by 213 publications

(149 citation statements)

References 39 publications

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“…There is a critical fluence for forming columnar structures. Nayak et al (2010) showed that below this threshold fluence, increasing the number of pulses does not form the regular columnar structures [117]. Usually, nanofeatures decorate the columnar structures.…”

Section: Columnar Structurementioning

confidence: 99%

“…There is a lower and upper threshold fluence for columnar structure formation. Columnar microstructures were fabricated on Ti in air above 0.5 J/cm 2 fluence and on Al surfaces below 0.16 J/cm 2 , whereas no microstructures were produced on copper samples [117]. The density of surface features decreased with increasing fluence for Ti.…”

Section: Formation Of Lipss and Nanowhiskers On Top Of Columnar Strucmentioning

confidence: 99%

“…It was suggested that the role of the gas environment on structure formation was physical rather than chemical. The formation of conical structures on stainless steel in He, air, SF6 (at 100 mbar) and in a vacuum (one mTorr) was also investigated [117]. Unlike on Ti, conical structures grew in SF6 on stainless steel, and the height of the pillars was larger in SF6 compared to other gas environments.…”

Section: Formation Of Lipss and Nanowhiskers On Top Of Columnar Strucmentioning

confidence: 99%

“…The holes were irregular in size and arrangements, and their diameters were up to ~15 μm. Nayak and Gupta (2010) ablated a Ti foil at 1.2 J/cm 2 and 1000 pulses per spot to generate random hole patterns [117]. The size of the holes varied from a few micrometers to a few hundred nanometers.…”

Section: Formation Of Lipss and Nanowhiskers On Top Of Columnar Strucmentioning

confidence: 99%

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Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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Abstract:Femtosecond laser micromachining has emerged in recent years as a new technique for micro/nano structure fabrication because of its applicability to virtually all kinds of materials in an easy one-step process that is scalable. In the past, much research on femtosecond laser micromachining was carried out to understand the complex ablation mechanism, whereas recent works are mostly concerned with the fabrication of surface structures because of their numerous possible applications. The state-of-the-art knowledge on the fabrication of these structures on metals with direct femtosecond laser micromachining is reviewed in this article. The effect of various parameters, such as fluence, number of pulses, laser beam polarization, wavelength, incident angle, scan velocity, number of scans, and environment, on the formation of different structures is discussed in detail wherever possible. Furthermore, a guideline for surface structures optimization is provided. The authors' experimental work on laser-inscribed regular pattern fabrication is presented to give a complete picture of micromachining processes. Finally, possible applications of laser-machined surface structures in different fields are briefly reviewed.

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Section: Columnar Structurementioning

confidence: 99%

Section: Formation Of Lipss and Nanowhiskers On Top Of Columnar Strucmentioning

confidence: 99%

Section: Formation Of Lipss and Nanowhiskers On Top Of Columnar Strucmentioning

confidence: 99%

Section: Formation Of Lipss and Nanowhiskers On Top Of Columnar Strucmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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“…Thus, such a textured Si surface is beneficial to enhance the efficiency of photovoltaic solar cell applications [39]. Similar structures can be produced on not only Si but also other semiconductors and metals [40][41][42]. A possible mechanism for the formation of this type of structure has been proposed, involving anomalous density behavior of the solid and molten materials when the phase is changed by laser irradiation [43].…”

Section: Surface Micro-and Nanostructuringmentioning

confidence: 99%

Progress in ultrafast laser processing and future prospects

Sugioka

2017

Nanophotonics

169

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Abstract:The unique characteristics of ultrafast lasers have rapidly revolutionized materials processing after their first demonstration in 1987. The ultrashort pulse width of the laser suppresses heat diffusion to the surroundings of the processed region, which minimizes the formation of a heat-affected zone and thereby enables ultrahigh precision micro-and nanofabrication of various materials. In addition, the extremely high peak intensity can induce nonlinear multiphoton absorption, which extends the diversity of materials that can be processed to transparent materials such as glass. Nonlinear multiphoton absorption enables three-dimensional (3D) micro-and nanofabrication by irradiation with tightly focused femtosecond laser pulses inside transparent materials. Thus, ultrafast lasers are currently widely used for both fundamental research and practical applications. This review presents progress in ultrafast laser processing, including micromachining, surface micro-and nanostructuring, nanoablation, and 3D and volume processing. Advanced technologies that promise to enhance the performance of ultrafast laser processing, such as hybrid additive and subtractive processing, and shaped beam processing are discussed. Commercial and industrial applications of ultrafast laser processing are also introduced. Finally, future prospects of the technology are given with a summary.

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Laser Engineering of Surface Structures

Narayan

Goering

Balani³

et al. 2014

Biosurfaces

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Over the past half century, rapid progress has been made in laser-based medical diagnosis and treatment, as well as in laser-based medical device fabrication. Lasers have unique capabilities for coating, machining, melting, polymerizing, sintering, and welding materials that are used in implantable and transdermal medical devices. In this review, academic and industrial developments involving laser processing of materials for dental, orthopedic, neural, ophthalmic, cardiovascular and transdermal applications are described. In addition, laser processing of nanoscale materials for medical applications is discussed. Finally, the challenges associated with commercialization of laser biomaterials are considered. Due to the unique capabilities provided by laser-based processes, it is anticipated that the use of laser biomaterials in implantable and transdermal medical devices will markedly increase over the coming years.

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Self-organized micro/nano structures in metal surfaces by ultrafast laser irradiation

Cited by 213 publications

References 39 publications

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Progress in ultrafast laser processing and future prospects

Laser Engineering of Surface Structures

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