scholarly journals Pulsed Laser Melting Effects on Single Crystal Gallium Phosphide

2009 ◽  
Author(s):  
D. Pastor ◽  
J. Olea ◽  
M. Toledano-Luque ◽  
I. Martil ◽  
G. Gonzalez-Diaz ◽  
...  
Keyword(s):  
Single Crystal ◽  
Gallium Phosphide ◽  
Pulsed Laser ◽  
Laser Melting

Formation of single crystal sulfur supersaturated silicon based junctions by pulsed laser melting

2007 ◽  
Vol 25 (6) ◽  
pp. 1847 ◽  
Author(s):  
Malek Tabbal ◽  
Taegon Kim ◽  
Jeffrey M. Warrender ◽  
Michael J. Aziz ◽  
B. L. Cardozo ◽  
...  
Keyword(s):  
Single Crystal ◽  
Pulsed Laser ◽  
Laser Melting ◽  
Silicon Based

Ti-doped Gallium Phosphide Layers with Concentrations Above the Mott Limit

2009 ◽  
Vol 1210 ◽  
Author(s):  
Javier Olea Ariza ◽  
David Pastor ◽  
María Toledano-Luque ◽  
Ignacio Mártil ◽  
Germán González-Díaz ◽  
...  
Keyword(s):  
Gallium Phosphide ◽  
Vibrational Mode ◽  
Pulsed Laser ◽  
X Ray Diffraction ◽  
Laser Melting ◽  
Intermediate Band ◽  
X Ray ◽  
Tof Sims ◽  
Crystalline Domains ◽  
Secondary Ion

AbstractWe have studied the Pulsed-Laser Melting (PLM) effects on Ti implanted GaP to form an Intermediate Band (IB). Structural analysis has been carried out by means of Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS), Raman spectroscopy and Glancing Incidence X-Ray Diffraction (GIXRD). After the PLM annealing, Ti concentration is over the Mott limit. Nevertheless, the Raman spectra show a forbidden TO vibrational mode of GaP. This result suggests the formation of crystalline domains with a different orientation in the annealed region regarding to the GaP unannealed substrate. This conclusion has been corroborated by GIXRD measurements. As a result of the polycrystalline lattice, a drop of the mobility is produced.

Liquid Phase Growth of Epitaxial Ni and Co Silicides by Pulsed Laser Irradiation

1983 ◽  
Vol 23 ◽  
Author(s):  
R. T. Tung ◽  
J. M. Gibson ◽  
D. C. Jacobson ◽  
J. M. Poate
Keyword(s):  
Liquid Phase ◽  
Single Crystal ◽  
Liquid Phase Epitaxy ◽  
Cell Formation ◽  
Pulsed Laser ◽  
Phase Growth ◽  
Interfacial Instabilities ◽  
Laser Melting ◽  
Liquid Phase Growth ◽  
Pulsed Laser Irradiation

ABSTRACTEpitaxial Ni and Co silicides have been fabricated using pulsed laser melting. Interfacial instabilities and cell formation are suppressed during the liquid-phase epitaxy by melting mono or disilicide layers. Single crystal NiSi2 and CoSi2 films have been grown on (100) and (111) Si following a post-anneal. This method does not require UHV deposition or reaction techniques.

Correlation between crystallinity and mid-infrared optical absorption spectra of silicon supersaturated with sulfur

2015 ◽  
Vol 1738 ◽  
Author(s):  
Ikurou Umezu ◽  
Katsuki Nagao ◽  
Tatsuya Nakai ◽  
Muneyuki Naito ◽  
Mitsuru Inada ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Single Crystal ◽  
Thermal Annealing ◽  
Laser Fluence ◽  
Annealing Temperature ◽  
Pulsed Laser ◽  
Single Crystal Substrate ◽  
Laser Melting ◽  
Mid Infrared ◽  
Insulator Metal Transition

ABSTRACTWe prepared silicon hyperdoped with sulfur by ion-implantation followed by pulsed laser melting. Effects of laser fluence during pulsed laser melting and of post-annealing on the silicon hyperdoped with sulfur are investigated. The structure of hyperdoped layer changes from poly-to mono-crystal with increasing laser fluence. Interface between sulfur-implanted-layer and single-crystal substrate disappear above 1.1 J/cm2. The spectral intensity of mid-infrared (MIR) optical absorption increases with crystallinity and spectral shape depends on whether the melt depth during pulsed laser melting reaches interface between implanted layer and single-crystal silicon substrate or not. The MIR absorption intensity rapidly decreases with thermal annealing temperature and almost disappears at 750 °C. The activation energy of conductivity decreases with increasing laser fluence and further decreases with increasing post thermal-annealing temperature. The insulator-metal transition is observed for the sample annealed at 750 °C. These results indicate that there is no direct correlation between MIR optical absorption band and insulator-metal transition.

Microanalysis of silicate glass films grown on α-Al2O3 by pulsed-laser deposition

1993 ◽  
Vol 51 ◽  
pp. 438-439
Author(s):  
Michael P. Mallamaci ◽  
James Bentley ◽  
C. Barry Carter
Keyword(s):  
Liquid Phase ◽  
Single Crystal ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Ceramic Materials ◽  
Laser Deposition ◽  
Triple Junctions ◽  
Ion Milling ◽  
Multicomponent Oxides ◽  
Glass Films

Glass-oxide interfaces play important roles in developing the properties of liquid-phase sintered ceramics and glass-ceramic materials. Deposition of glasses in thin-film form on oxide substrates is a potential way to determine the properties of such interfaces directly. Pulsed-laser deposition (PLD) has been successful in growing stoichiometric thin films of multicomponent oxides. Since traditional glasses are multicomponent oxides, there is the potential for PLD to provide a unique method for growing amorphous coatings on ceramics with precise control of the glass composition. Deposition of an anorthite-based (CaAl2Si2O8) glass on single-crystal α-Al2O3 was chosen as a model system to explore the feasibility of PLD for growing glass layers, since anorthite-based glass films are commonly found in the grain boundaries and triple junctions of liquid-phase sintered α-Al2O3 ceramics.Single-crystal (0001) α-Al2O3 substrates in pre-thinned form were used for film depositions. Prethinned substrates were prepared by polishing the side intended for deposition, then dimpling and polishing the opposite side, and finally ion-milling to perforation.

scholarly journals The Al Doping Effect on Epitaxial (In,Mn)As Dilute Magnetic Semiconductors Prepared by Ion Implantation and Pulsed Laser Melting

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4138
Author(s):  
Ye Yuan ◽  
Yufang Xie ◽  
Ning Yuan ◽  
Mao Wang ◽  
René Heller ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Ion Implantation ◽  
Diluted Magnetic Semiconductors ◽  
Laser Annealing ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Pulsed Laser ◽  
Laser Melting ◽  
Co Doping ◽  
Diluted Magnetic

One of the most attractive characteristics of diluted ferromagnetic semiconductors is the possibility to modulate their electronic and ferromagnetic properties, coupled by itinerant holes through various means. A prominent example is the modification of Curie temperature and magnetic anisotropy by ion implantation and pulsed laser melting in III–V diluted magnetic semiconductors. In this study, to the best of our knowledge, we performed, for the first time, the co-doping of (In,Mn)As diluted magnetic semiconductors by Al by co-implantation subsequently combined with a pulsed laser annealing technique. Additionally, the structural and magnetic properties were systematically investigated by gradually raising the Al implantation fluence. Unexpectedly, under a well-preserved epitaxial structure, all samples presented weaken Curie temperature, magnetization, as well as uniaxial magnetic anisotropies when more aluminum was involved. Such a phenomenon is probably due to enhanced carrier localization introduced by Al or the suppression of substitutional Mn atoms.

Pulsed Laser Melting: The Effect of Implanted Solutes on the Resolidification Velocity

1983 ◽  
Vol 23 ◽  
Author(s):  
G. J. Galvin ◽  
J. W. Mayer ◽  
P. S. Peercy
Keyword(s):  
Electrical Conductance ◽  
Pulsed Laser ◽  
Solute Concentration ◽  
Atomic Percent ◽  
Supersaturated Solution ◽  
Solidification Velocity ◽  
Laser Melting ◽  
Solid Interface ◽  
Solution Studies ◽  
Nonequilibrium Segregation

ABSTRACTTransient electrical conductance has been used to measure the resolidification velocity in silicon containing implanted solutes. Nonequilibrium segregation of the solutes occurs during the rapid resolidification following pulsed laser melting. The velocity of the liquid-solid interface is observed to depend on the type and concentration of the solute. A 25% reduction in solidification velocity is observed for an implanted indium concentration of three atomic percent. Implanted oxygen is also shown to reduce the solidification velocity. The dependence of the velocity on solute concentration impacts a variety of segregation, trapping and supersaturated solution studies.

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