Precise Periodic Structuring with Femtosecond-laser.

Sawada, Hiroshi; Kawahara, Kousuke; Ninomiya, Takafumi; Kurosawa, Kou; Yokotani, Atsushi

doi:10.2493/jjspe.69.554

Cited by 21 publications

(7 citation statements)

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“…Precise regular grooves are produced using linear polarized femto-second laser energy near the ablation threshold, and spacing of regular structures about the same as the laser wavelength [8]. Applying this technology, the regular nano/microgrooves 100-150 nm deep and spaced at 700 nm were produced on the rake face of the cemented carbide cutting tool using a laser (Canon Machinery Inc., Model Surfbeat R; peak wavelength 800 nm, pulse width 150 fs, cyclic frequency 1 kHz, pulse energy 300 J).…”

Section: Cutting Tool With Nano/micro-textured Surfacementioning

confidence: 99%

“…Femto-second laser technology was adopted to generate nano/micro-grooves [8,9] on the rake face of a cemented carbide cutting tool. Precise regular grooves are produced using linear polarized femto-second laser energy near the ablation threshold, and spacing of regular structures about the same as the laser wavelength [8].…”

Section: Cutting Tool With Nano/micro-textured Surfacementioning

confidence: 99%

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Development of a cutting tool with a nano/micro-textured surface—Improvement of anti-adhesive effect by considering the texture patterns

Sugihara

Enomoto

2009

Precision Engineering

186

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Section: Cutting Tool With Nano/micro-textured Surfacementioning

confidence: 99%

Section: Cutting Tool With Nano/micro-textured Surfacementioning

confidence: 99%

Development of a cutting tool with a nano/micro-textured surface—Improvement of anti-adhesive effect by considering the texture patterns

Sugihara

Enomoto

2009

Precision Engineering

186

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“…Therefore, a textured surface and two materials were tested for use in laser trapping of a microsphere. For the surface texture, a sub-micrometer texture was produced by using a femtosecond laser, forming the so-called femtosecond laser-induced periodic surface structures (FLIPPS) (Sawada et al 2003). The materials chosen for the substrate were tungsten carbide, as a conductor, and silicon, as an insulator.…”

Section: Substratementioning

confidence: 99%

New Technique for Single-Beam Gradient-Force Laser Trapping in Air

Michihata

Yoshikane

Hayashi

et al. 2013

International Journal of Optomechatronics

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Laser trapping is becoming an important technique for microsystem technologies. To apply it to industrial uses, it should be developed to function in air. However, there is not much research about laser trapping in air. One of the reasons is the difficulty of trapping micro-objects. Therefore, we have proposed a new technique to trap micro-objects in air. In particular, we focused our attention on the substrate where the micro-object is set. By applying a textured surface and employing tungsten carbide as the substrate material, the trapping probability was improved by a remarkable amount. Although a certain degree of improvement was attained, the trapping was still not perfect. To ascertain the forces working on the micro-object, an analytical calculation of the adhesion forces and an electromagnetic simulation of the optical forces were implemented. Based on these calculations, we discuss what the most important factor is for successful laser trapping in air.

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“…In our former ring-on-disk test in water using SiC specimens, an improvement of the load carrying capacity and a shortened running-in process have been reported 4) , in which spirally-oriented periodic structures were formed by irradiation of femtosecond laser pulses on the sliding disk. These periodic structures are formed in a self-organized fashion on materials surface by the irradiation of linearly polarized femtosecond laser pulses with a fluence around the ablation threshold 5) . The period is of the order of the laser wavelength and the depth is below half.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Periodic Structures for Bi-directional Rotation on Water Lubrication Properties of SiC

2008

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In order to improve the lubrication properties of silicon carbide (SiC) in water, symmetrically spiral periodic structures for bi-directional rotation were intermittently and alternately produced on the surface. These periodic structures of submicron size develope in a self-organized fashion on a surface illuminated by linearly polarized femtosecond laser pulses with a low fluence (slightly above the ablation threshold). The periodic structures formed on the sliding surface of the disk. Ring-on-disk tests were performed to investigate the influence of the periodic structures on the friction coefficient. The experiment showed that the symmetrically spiral periodic structures for bi-directional rotation accelerated the running-in process and achieved a low friction coefficient, µ<0.01, which was about the same as the uni-directional spiral periodic structures.

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Precise Periodic Structuring with Femtosecond-laser.

Cited by 21 publications

References 0 publications

Development of a cutting tool with a nano/micro-textured surface—Improvement of anti-adhesive effect by considering the texture patterns

Development of a cutting tool with a nano/micro-textured surface—Improvement of anti-adhesive effect by considering the texture patterns

New Technique for Single-Beam Gradient-Force Laser Trapping in Air

Effect of Surface Periodic Structures for Bi-directional Rotation on Water Lubrication Properties of SiC

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