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Showing 1 to 20 of 113 for “"pulsed laser deposition"”.
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Femtosecond pulsed laser deposition
… investigates two variations of the conventional pulsed laser deposition (PLD) technique. The first technique is femtosecond PLD, whereby the laser used to ablate the target has a significantly higher peak intensity and shorter pulse duration as compared to conventional nanosecond lasers more …
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Pulsed Laser Deposition of Thin Film Heterostructures
… and Lanthanum Aluminate (100) substrates by pulsed laser deposition. X-ray diffraction results show that the films grown on the Strontium Titanate are amorphous and polycrystalline on the Lanthanum Aluminate. Resistances versus temperature measurements show that the films exhibit …
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Planar waveguide devices fabricated by pulsed laser deposition
… to be a comprehensive study on the use of pulsed laser deposition to fabricate planar waveguide devices. As such, a thorough review into the state of the art of current activities in this area is initially presented. A buried Nd:GGG waveguide laser has been fabricated for the first time by …
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Growth of Semiconductor Thin Films by Pulsed Laser Deposition
Pulsed ultraviolet light from a XeF excimer laser was used to grow thin films of zinc oxide and tin dioxide on (111) p-type silicon wafers within a versatile high vacuum laser deposition system. This pulsed laser deposition system was self-designed and self-built. Parameters such as pressure, …
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Template Directed Growth of Nb doped SrTiO₃ using Pulsed Laser Deposition
… which were then filled with Nb:STO using Pulsed Laser Deposition (PLD) at room temperature. This technique produced nanowires and nanodots with critical dimensions below 100 nm, and a yield of approximately 95%. In addition to scanning electron microscopy and atomic force microscopy …
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Pulsed laser deposition of chalcogenide glass materials for potential waveguide laser applications
… many applications for small scale, solid state lasers in the near infrared, where conversely there are very few such devices. A lasing device in a rare earth doped gallium-lanthanum-sulphide thin film is attractive due to emission at wavelengths in the 2 to 5 µm region where many gasses and …
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Pulsed laser deposition of thick multilayer garnet crystal films for waveguide laser devices
… aim of this project was to use the technique of pulsed laser deposition (PLD) to fabricate thick multilayered garnet crystal planar waveguides with rare-earth ion doped cores for use as planar waveguide laser devices. Planar waveguides are of interest because of the implications of their …
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Tuning Strong Correlated Properties in EuTiO3 Thin Films Grown by Pulsed Laser Deposition
… of growth pressure, substrate temperature and laser repetition rate. The optimized growth condition (laser repletion rate of 3 Hz, substrate temperature of 710 oC and growth pressure of 1-2∙10-6 Torr) was confirmed to make the (ETO)1-x-(Eu2O3)x (x = 0.2, 0.25, 0.33, 0.5) epitaxial thin film on …
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Growth by pulsed laser deposition and characterisation of zinc oxide thin films and nanostructures
… thin films and nanostructures grown using the pulsed laser deposition technique. In this technique, a solid state Nd:YAG laser operating at 266 nm and with a 6 ns pulse width was fired at a sintered, ceramic target to produce an expanding plume of ZnO into a vacuum chamber (pressures in the …
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Excitation-Induced Ge Quantum Dot Growth on Si(100)-2X1 by Pulsed Laser Deposition
… dots (QD) are grown on Si(100)-(2×1) with laser excitation during growth processes by pulsed laser deposition (PLD). <em>In situ </em>reflection-high energy electron diffraction (RHEED) and post-deposition atomic force microscopy (AFM) are used to study the growth dynamics and morphology of …
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Structure and properties of transparent conductive ZnO films grown by pulsed laser deposition (PLD)
… thin films were grown on glass substrates by the pulsed laser deposition (PLD) technique using a KrF excimer laser with wavelength of 248nm. The influence of ambient oxygen pressure, substrate temperature, laser fluence, the number of pulses and doping with silicon was investigated. The …
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Pulsed laser deposition of superconducting Sr2RuO4 thin-films and the role of crystallographic defects
… beam epitaxy (MBE), reproducible growth by pulsed laser deposition (PLD) remains extremely challenging. In this thesis, we developed a protocol for the reliable growth of superconducting SRO214 thin-films by pulsed laser deposition and identify the type of structural defects that are …
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Ultra-thin boron nitride films by pulsed laser deposition: Plasma diagnostics, synthesis, and device transport
<p>This work describes, for the first time, a pulsed laser deposition (PLD) technique for growth of large area, stoichiometric ultra-thin hexagonal and amorphous boron nitride for next generation 2D material electronics. The growth of boron nitride, in this case, is driven by the high kinetic …
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An analysis of ferromagnetic shape memory alloys produced by melt spinning, sputtering and pulsed laser deposition.
… alloys were also produced by both sputtering and pulsed laser deposition in order to characterise their behaviour and gain some insight into the growth conditions necessary to successfully produce thin films of ferromagnetic shape memory alloys. This was done because thin films grown at low …
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An investigation into controlling the growth modes of ferroelectric thin films using pulsed laser deposition and RHEED
… diffraction (RHEED) in combination with interval pulsed laser deposition (PLD) has been used to achieve a two dimensional, layer-by-layer growth mode. Crucial to this was the deposition of a unit-cell thick titanium dioxide buffer layer on the surface, the deposition of which was also controlled …
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Structural, electrical and optical properties of transparent conducting Si-doped ZnO thin films grown by pulsed laser deposition
… ablated onto borosilicate glass substrates by pulsed laser deposition of a bulk ZnO target doped with 2 wt% silicon. The rotating target was irradiated at low ambient oxygen pressures by a KrF Excimer laser (Lambda physics LPX 300) emitting pulses of 0.18 ns in length, with frequency of 10 Hz, …
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Combinatorial Pulsed Laser Deposition Employing Radially-Segmented Targets: Exploring Orthorhombic (InxGa1−x)2O3 and (AlxGa1−x)2O3 Towards Superlattice Heterostructures
… einer neuartigen Methode der gepulsten Laser-Plasmaabscheidung (PLD) über die Untersuchung der ternären In- und Al-Legierungssysteme von metastabilem orthorhombischen κ-Ga2O3 auf der Basis dieser Methode hin zu Multi-Quantengraben (QW) Supergitter (SL) Heterostrukturen für transparente …
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Superior pinning properties in nano-engineered YBa2Cu3O7-δ
… nanoparticles in YBa2Cu3O7-δ thin films grown by pulsed laser deposition. The structural and morphological characteristic of the pinning landscapes produced are investigated and correlated to their effects on the superconducting properties of the thin films. In particular two pinning landscapes …
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