Laser Annealing of Defects in Vpe and Cz Grown Gallium Arsenide with a Pulsed Nd:Yag Laser

1980 ◽  
Vol 1 ◽  
Author(s):  
P. M. Mooney ◽  
J. C. Bourgoin ◽  
J. Icole
Keyword(s):  
Gallium Arsenide ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Laser Annealing ◽  
Schottky Diodes ◽  
Native Defect ◽  
Pulsed Nd:Yag Laser ◽  
Electron Traps

ABSTRACTGallium arsenide crystals, both VPE and Cz grown, were annealed with a pulsed Nd:YAG laser. Gold Schottky diodes were fabricated and defects were studied using the DLTS technique. The native defect E(0.83eV) was found to anneal while other electron traps, E(0.39eV) in both materials and E(0.30eV)in Cz material, remained after irradiation. A new trap, E(0.70eV), was observed after laser irradiation in both materials.Cz GaAs samples implanted with both Ga and As were also laser annealed. The E(0.83eV) level was not observed after implantation. The E(0.30eV) trap and new levels, E(0.44eV) and E(0.6leV) were observed. C-V measurements and defect profiles indicate that the recrystallized layer is far from defect free.

Preventive Effect of Tooth Fracture by Pulsed Nd:YAG Laser Irradiation with Diamine Silver Fluoride Solution

2001 ◽  
Vol 19 (6) ◽  
pp. 315-318 ◽  
Author(s):  
Keiko Yokoyama ◽  
Yuichi Kimura ◽  
Koukichi Matsumoto ◽  
Akihiro Fujishima ◽  
Takashi Miyazaki
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Preventive Effect ◽  
Fluoride Solution ◽  
Pulsed Nd:Yag Laser ◽  
Tooth Fracture ◽  
Silver Fluoride

Effect of Pre-Oxidized CuO Layer in Joining between Polyethylene Terephalate (PET) and Copper (Cu) by Using Pulsed Nd:YAG Laser

2010 ◽  
Vol 129-131 ◽  
pp. 714-718 ◽  
Author(s):  
Farazila Yusof ◽  
Yoshiharu Mutoh ◽  
Yukio Miyashita
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Shear Failure ◽  
High Heat ◽  
Experimental Result ◽  
Joint Interface ◽  
Intimate Contact ◽  
Cross Sectional ◽  
Pulsed Nd:Yag Laser ◽  
Oxide Particles

In the present study, effect of pre-oxidized (PO) CuO layer in the joining between polyethylene terephalate (PET) and copper (Cu) by using pulsed Nd:YAG laser was investigated. The experimental result for PET/PO Cu (with pre-oxidized layer) and PET/Cu (without pre-oxidized layer) were presented in this paper. The results showed the pre-oxidation surface improved the welding efficiency. The welded area and tensile shear failure load (TSFL) of PET/PO Cu joint were increased when pre-oxidized layer was introduced. This indicates that high heat was absorbed during laser irradiation of PET/PO-Cu joint compare to PET/Cu joint. On the other hand, the fracture surface of PET/PO-Cu showed the presence of Cu and Cu oxide particles in the PET side. While in case of PET/Cu, no occurrence of Cu particles can be observed. The presence of Cu oxide particles and Cu particles were believed may increase PET/PO Cu joint shear force. From the cross-sectional observation of PET/PO Cu joint interface, it was found that an oxide layer in the laser irradiation area was removed and PET seemed to have intimate contact with Cu surface.

Impact of Pulsed Nd:YAG Laser Irradiation on the Growth and Mortality of the Biofilm Forming Marine Bacterium Pseudoalteromonas carrageenovora

Biofouling ◽  
2002 ◽  
Vol 18 (2) ◽  
pp. 123-127 ◽  
Author(s):  
Kanavillil Nandakumar ◽  
Hideki Obika ◽  
Tatsuya Shinozaki ◽  
Toshihiko Ooie ◽  
Akihiro Utsumi ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Marine Bacterium ◽  
Pulsed Nd:Yag Laser

The effect of a pulsed-Nd:YAG laser irradiation on microstructure of human gingiva

1997 ◽  
Vol 27 (2) ◽  
pp. 317
Author(s):  
Kyung-Yoon Han ◽  
Kwang-Yong Shin ◽  
Chun-Seok Kim ◽  
Hyung-Soo Kim ◽  
Chang-Yup Yum ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser ◽  
Human Gingiva

Long-term effect of pulsed Nd:YAG laser irradiation on cultured human periodontal fibroblasts

2005 ◽  
Vol 36 (3) ◽  
pp. 225-233 ◽  
Author(s):  
Yi-Jane Chen ◽  
Jiiang-Huei Jeng ◽  
Chung-Chen Jane Yao ◽  
Min-Huey Chen ◽  
Lein-Tuan Hou ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Term Effect ◽  
Pulsed Nd:Yag Laser ◽  
Long Term Effect ◽  
Human Periodontal Fibroblasts

Removal of Two Types of Root Canal Filling Material Using Pulsed Nd:YAG Laser Irradiation

2004 ◽  
Vol 22 (6) ◽  
pp. 470-476 ◽  
Author(s):  
Tomoo Anjo ◽  
Arata Ebihara ◽  
Atsushi Takeda ◽  
Masaaki Takashina ◽  
Mitsuhiro Sunakawa ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Filling Material ◽  
Root Canal Filling ◽  
Pulsed Nd:Yag Laser

The Effects of Pulsed Nd:YAG Laser Irradiation with Fluoride on Root Surface

1996 ◽  
Vol 14 (6) ◽  
pp. 399-403 ◽  
Author(s):  
CHENGFEI ZHANG ◽  
YUICHI KIMURA ◽  
KOUKICHI MATSUMOTO
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Root Surface ◽  
Pulsed Nd:Yag Laser
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