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Article
Femtosecond-laser nanofabrication onto silicon surface with near-field localization generated by plasmon polaritons in gold nanoparticles with oblique irradiation
Nanohole fabrication process with gold nanoparticles irradiated by femtosecond laser at different incident angles is investigated. Nanoparticles with diameter of 200 nm and laser irradiation with center wavele...
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Article
Nanostructuring of silicon surface by femtosecond laser pulse mediated with enhanced near-field of gold nanoparticles
Nanostructure fabrication on a silicon substrate using a near-field electromagnetic enhancement in the vicinity of gold nanoparticles is studied. Experimental and theoretical investigations are made in order t...
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Article
Improvement of surface smoothness of Nd:KGd(WO4)2 films by nozzle-gas-assisted pulsed-laser deposition
We have demonstrated efficient film oxidation of Nd:KGW [or Nd:KGd(WO4)2] films using a newly developed nozzle-gas-assisted pulsed-laser deposition (NGA-PLD) method. This technique is systematically studied and e...
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Article
Materials processing by use of a Ti:Sapphire laser with automatically-adjustable pulse duration
We have developed an automatic pulsewidth-adjustable femtosecond Ti:Sapphire laser system that can generate an output of 50 fs-1 ps in duration, and sub-mJ/pulse at a repetition rate of 1 kpps. The automatic p...
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Article
Control of the refractive index change in fused silica glasses induced by a loosely focused femtosecond laser
We demonstrate waveguide fabrication using of a loosely focused femtosecond laser that induces both nonlinear ionization and nonlinear propagation in silica glasses without any scanning process. The numerical ...
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Article
Fabrication of Nd:KGW film on a Si substrate with a CeO2 buffer layer
Highly textured single-oriented (110) Nd-doped potassium gadolinium tungstate [Nd:KGd(WO4)2 or Nd:KGW] thin films were successfully fabricated on (100) Si substrate by introducing a (100) CeO2 buffer layer using ...
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Article
Pulsed-laser deposition of a Nd:KGd(WO4)2 waveguide in Ar and O2 environments
Thin-film Nd-doped potassium gadolinium tungstate (Nd:KGW or KGd(WO4)2) waveguides are deposited on (1102)sapphire or (100)YAG substrates by KrF laser ablation of potassium-rich ceramic targets in Ar and O2. The ...
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Article
Tailored ablation processing of advanced biomedical hydroxyapatite by femtosecond laser pulses
The micromachining of hydroxyapatite (HAp) is highly important for orthopedics and dentistry, since human bone and teeth consist mainly of HAp. We demonstrate ultrashort Ti:sapphire laser ablation of HAp, usin...
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Article
Ablation characteristics of Au, Ag, and Cu metals using a femtosecond Ti:sapphire laser
Femtosecond laser ablation of metallic bulk crystals of Au, Ag and Cu was experimentally studied with laser pulse widths ranging from 120 fs through 800 fs at a center wavelength of 780 nm for micro-machining...
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Article
Efficient ablation of organic polymers polyether sulphone and polyether ether ketone by a TEA CO2 laser with high perforation ability
Organic polymer (PES: PolyEther Sulphone and PEEK: PolyEther Ether Ketone) ablation with oscillation-line selected TEA CO2 lasers is successfully demonstrated. With different irradiation conditions the ablative e...