Ablation threshold dependence on pulse duration for copper

Hashida, Masaki; Semerok, A.; Gobert, O.; Petite, G.; Izawa, Y.; Wagner, J.-F.

doi:10.1016/s0169-4332(02)00463-4

Cited by 201 publications

(109 citation statements)

References 11 publications

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“…1,2 Femtosecond (fs) laser processing can be applied to micro-and nanometer fabrication of various materials such as metals, 3,4 semiconductors, 5 and insulators. 6 Surface modification such as the formation of periodic grating structures on a metal surface has also been demonstrated under irradiation with multiple fs laser pulses, [7][8][9][10] and these structures have been actively studied. 11,12 The observed grating spacing was of the scale of several hundreds of nanometers, and was sometimes shorter than the irradiation laser wavelength.…”

Section: Introductionmentioning

confidence: 99%

Formation of x-ray Newton’s rings from nano-scale spallation shells of metals in laser ablation

et al. 2017

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The initial stages of the femtosecond (fs) laser ablation process of gold, platinum, and tungsten were observed by single-shot soft x-ray imaging technique. The formation and evolution of soft x-ray Newton’s rings (NRs) were found for the first time. The soft x-ray NRs are caused by the interference between the bulk ablated surface and nanometer-scale thin spallation layer; they originate from the metal surface at pump energy fluence of around 1 J/cm2 and work as a flying soft x-ray beam splitter.

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Section: Introductionmentioning

confidence: 99%

Formation of x-ray Newton’s rings from nano-scale spallation shells of metals in laser ablation

et al. 2017

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“…However, it has not been possible to obtain sufficient emission uniformity at low applied electric fields using these methods. Recently, a periodic nano-structure formation produced by femtosecond laser ablation [5] [6] has been demonstrated for various materials such as metals [7], dielectrics [8] [9], and semiconductors [10]. The periodic formation originates from the interference between the incident laser and the scattered wave (or plasma wave) along the surface.…”

Section: Introductionmentioning

confidence: 99%

Carbon-nanotube cathode modified by femtosecond laser ablation

Hashida¹,

Shimizu²,

Shimizu

2007

J. Phys.: Conf. Ser.

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“…Ultrashort laser ablation is a very complicated process, and further work is still needed to completely understand the fundamental ablation mechanisms. Earlier investigations show that material removal during ultrashort laser ablation may be realized through one or a combination of the following mechanisms, such as spallation, Coulomb explosion, phase explosion, critical-point phase separation (CPPS), and fragmentation [23,[33][34][35][36][37][38][39][40][41][42][43][44][45][46]. The actual mechanisms depend on laser intensity, wavelength, material types, etc.…”

Section: Ultrashort-pulsed Laser Ablationmentioning

confidence: 99%

Micro‐Laser Processing

Özel²

2011

Micro‐Manufacturing

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INTRODUCTIONThe use of laser technology in the processing of materials for micro-products has been reported over the last decade. Laser-based material processing on a microscale has been used in thermal processing, shock peening, surface treatment, cleaning of surfaces, welding, melting and polishing, scribing, as well as micromachining of basic geometric features on a variety of materials [1][2][3][4][5][6][7][8][9][10][11][12].Lasers are usually categorized as two groups: continuous wave (cw) and pulsed lasers. Conventional cw and pulsed laser irradiation and ablation is used in many fields, such as material processing, machining, etching, deposition, sintering, micro-fluidics, medical, and many other applications [13][14][15][16][17][18][19].The use of lasers in micro-manufacturing is closely connected to the characteristics of the laser. The main laser parameters to be chosen and controlled are wavelength, λ (nm); average power (W) or energy (J); intensity (W/m 2 ) or fluence, ( ) (J/m 2 ); pulse duration, τ (s); pulse repetition rates (Hz); and peak power (pulse energy/pulse duration) [9,11,16,20,21].Pulsed lasers achieve much higher intensities than cw lasers and are the preferred solution for the fabrication of micro-sized structures. Long-pulsed (nanosecond, ns), short-pulsed (picoseconds, ps), and ultrashort-pulsed (femtosecond, fs) lasers that are commonly used for repairing, trimming, marking, scribing, texturing, welding, ablation, cutting, and drilling include among others (i) Excimer lasers with ultraviolet (UV) wavelengths, (ii) Ti:sapphire lasers Micro-Manufacturing: Design and Manufacturing of Micro-Products, First Edition. Edited by Muammer Koç and TugrulÖzel.

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Ablation threshold dependence on pulse duration for copper

Cited by 201 publications

References 11 publications

Formation of x-ray Newton’s rings from nano-scale spallation shells of metals in laser ablation

Formation of x-ray Newton’s rings from nano-scale spallation shells of metals in laser ablation

Carbon-nanotube cathode modified by femtosecond laser ablation

Micro‐Laser Processing

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