Effect of permittivity on periodic nanostructures by femtosecond laser irradiation on Ti plate

2017 ◽  
Author(s):  
T. Ooga ◽  
M. Tsukamoto ◽  
Y. Sato ◽  
M. Miyake
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Irradiation ◽  
Periodic Nanostructures

Producing anomalous uniform periodic nanostructures on Cr thin films by femtosecond laser irradiation in vacuum

2020 ◽  
Vol 45 (6) ◽  
pp. 1301
Author(s):  
Fei Wang ◽  
Bo Zhao ◽  
Yuhao Lei ◽  
Jianjun Yang ◽  
Chunlei Guo
Keyword(s):  
Thin Films ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Irradiation ◽  
Periodic Nanostructures

Biocompatibility of Titanium Dioxide Film Modified by Femtosecond Laser Irradiation

2014 ◽  
Vol 783-786 ◽  
pp. 1377-1382 ◽  
Author(s):  
Masahiro Tsukamoto ◽  
Togo Shinonaga ◽  
Akiko Nagai ◽  
Kimihiro Yamashita ◽  
Takao Hanawa ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Film Surface ◽  
Polarization Vector ◽  
Cell Spreading ◽  
Laser Wavelength ◽  
Femtosecond Laser Irradiation ◽  
Periodic Nanostructures ◽  
Cell Test

Titanium (Ti) is one of the most widely used for biomaterials, because of its excellent anti-corrosion and high mechanical properties. In addion to these properies, the bioactivity of Ti is required. Recently, coating of the titanium dioxide (TiO2) film on Ti plate surface is useful methods to obtain biocompatibility of Ti plate. If periodic nanostructures were formed on the film surface, direction of cell spreading might be controlled due to grooves direction. Then, femtosecond laser is one of the useful tools of periodic nanostructures formation. Peiriod of periodic nanostructures might be varied by changing the laser wavelength. In the experiments, the film was formed on Ti plate with an aerosol beam which was composed of submicron size TiO2 particles and helium gas. The film was irradiated with the femtosecond laser. Laser wavelengths of the laser was at 1044, 775 and 388 nm, respectively. Periodic nanostructures, lying perpendicular to the laser electric field polarization vector, were formed on the film by femtosecond laser irradiation at 1044, 775 and 388 nm, respectively. The period of the periodic nanostructures on the film produced by femtosecond laser irradiation at 1044, 775 and 388 nm was about 350, 230 and 130 nm, respectively. In the cell test, cell spreading along the grooves of the periodic nanostructures was observed although it was not done for the film without the periodic nanostructures. These results suggested that direction of cell spreading could be controlled by the periodic nanostructures formation

scholarly journals Femtosecond Laser-Induced Self-Assembly of Ce3+-Doped YAG Nanocrystals

Crystals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1142
Author(s):  
Yasuhiko Shimotsuma ◽  
Kotaro Tomura ◽  
Tatsuya Okuno ◽  
Masahiro Shimizu ◽  
Kiyotaka Miura
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Self Assembly ◽  
Three Dimensional ◽  
Photonic Devices ◽  
Femtosecond Laser Irradiation ◽  
Ligand Field ◽  
Femtosecond Pulses ◽  
Periodic Nanostructures ◽  
Partial Crystallization

Direct three-dimensional laser writing of crystallization inside glass has been intensely studied as an attractive technique for fabricating photonic devices. In particular, polarization-dependent periodic nanostructures composed of the partial crystallization in glass can be self-assembled through focused irradiation of femtosecond pulses. Here, we report on the Y3Al5O12 (YAG) crystal precipitation in nanoscale by femtosecond laser irradiation inside Al2O3-Y2O3 glass. Furthermore, we focus on the white emission by Ce: YAG in which a part of Y3+ site was replaced by Ce3+, the effect on photoluminescence (PL) characteristics by changing of ligand field induced by nanostructure formation was observed.

Periodic nanostructures self-formed on silicon and silicon carbide by femtosecond laser irradiation

2014 ◽  
Vol 117 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Laura Gemini ◽  
Masaki Hashida ◽  
Masahiro Shimizu ◽  
Yasuhiro Miyasaka ◽  
Shunsuke Inoue ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Irradiation ◽  
Periodic Nanostructures

Generation of nano-bumps on transparent quartz glass surface under femtosecond laser irradiation

2008 ◽  
Author(s):  
Wei Guo ◽  
Zeng Bo Wang ◽  
Lin Li ◽  
Zhu Liu ◽  
Boris Luk’yanchuk ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Quartz Glass ◽  
Glass Surface ◽  
Femtosecond Laser Irradiation

scholarly journals Condensation of Si-rich region inside soda-lime glass by parallel femtosecond laser irradiation

2014 ◽  
Vol 22 (13) ◽  
pp. 16493 ◽  
Author(s):  
Masaaki Sakakura ◽  
Kouhei Yoshimura ◽  
Torataro Kurita ◽  
Masahiro Shimizu ◽  
Yasuhiko Shimotsuma ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Soda Lime ◽  
Femtosecond Laser Irradiation ◽  
Soda Lime Glass ◽  
Rich Region

scholarly journals Three- and four-photon excited upconversion luminescence in terbium doped lutetium silicate powders by femtosecond laser irradiation

2013 ◽  
Vol 3 (11) ◽  
pp. 1803 ◽  
Author(s):  
Nikifor Rakov ◽  
Whualkuer Lozano B. ◽  
Edilson L. Falcão-filho ◽  
Renato B. Guimarães ◽  
Glauco S. Maciel ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Upconversion Luminescence ◽  
Femtosecond Laser Irradiation

scholarly journals Photo-initiation of ZnO nanorod formation by femtosecond laser irradiation

2010 ◽  
Vol 118 (1374) ◽  
pp. 147-151 ◽  
Author(s):  
Nan WU ◽  
Yasuhiko SHIMOTSUMA ◽  
Masayuki NISHI ◽  
Masaaki SAKAKURA ◽  
Kiyotaka MIURA ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Femtosecond Laser Irradiation ◽  
Zno Nanorod
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