Influence of the Shape and Size of ahe Laser Spot on the Spatial Distribution of the Plasma Plume

1995 ◽  
Vol 397 ◽  
Author(s):  
A. Mele ◽  
A. Giardini Guidont ◽  
R. Kelly ◽  
A. Miotello ◽  
S. Orlando
Keyword(s):  
Plasma Plume ◽  
Pulsed Laser ◽  
Ccd Camera ◽  
Laser Deposition ◽  
Laser Spot ◽  
Plume Dynamics ◽  
Gas Dynamic ◽  
High Intensity Laser ◽  
Intensity Laser ◽  
Deposit Characteristics

ABSTRACTPulsed laser deposition may be accomplished by irradiating a target with a high intensity laser pulse. The flux of particles moving from the target to the substrate obeys gas-dynamic laws when the density of the emitted particles exceeds ∼1 monolayer/(10 ns). The angular distribution of the plume, which depends on various factors, will strongly affect the deposit characteristics. It has been found that an intensified CCD camera can be successfully used to analyze laterally in two orthogonal directions the profile of the expanding plume. A marked influence of laser spot dimension and shape on plume dynamics is observed for laser ablation of a number of materials such as metals, semiconductors and high Tc superconductors.

scholarly journals Plasma plume dynamics, rebound, and recoating of the ablation target in pulsed laser deposition

2017 ◽  
Vol 121 (13) ◽  
pp. 135306 ◽  
Author(s):  
Alejandro Ojeda-G-P ◽  
Christof W. Schneider ◽  
Max Döbeli ◽  
Thomas Lippert ◽  
Alexander Wokaun
Keyword(s):  
Pulsed Laser Deposition ◽  
Plasma Plume ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Plume Dynamics

Reduction of Droplet Density onto Hydroxyapatite Films Grown by Pulsed Laser Deposition from Concave-Shaped Targets

1998 ◽  
Vol 526 ◽  
Author(s):  
Valentin Craciun
Keyword(s):  
Plasma Plume ◽  
Pulsed Laser ◽  
The Other ◽  
Laser Deposition ◽  
Laser Spot ◽  
Deposition Method ◽  
Cone Axis ◽  
Droplet Density ◽  
Scanning Electron ◽  
System Axis

AbstractA new deposition method, inspired from the crossed fluxes technique, which employs a concave, conic-shaped target is presented here. The rectangular excimer laser beam used for ablation was focused so that the middle of the spot laid exactly on the tip of the concave-shaped target. Each half of the laser spot created a plasma plume on one side of the concave target which was the symmetrical image across the cone axis of that created by the other half of the laser spot. The heavy droplets passed through the plasma interaction region without collisions and, maintaining their direction of motion, moved away from the system axis. The majority of the ablated ions and atoms emitted from one side of the spot collided with those emitted from the other side and, because of the symmetry of the concave-shaped target, acquired a velocity component along the system axis, moving towards the substrate. Scanning electron microscopy investigations showed a significant reduction of droplet density onto the surface of hydroxyapatite layers grown from such concave-shaped targets as compared to films grown from the usual cylindrical targets.

Characterisation of the optical emission of the plasma plume during pulsed laser deposition of superconducting MgB2 thin films

Vacuum ◽  
2002 ◽  
Vol 69 (1-3) ◽  
pp. 267-271 ◽  
Author(s):  
V.N Tsaneva ◽  
N.A Stelmashenko ◽  
I.N Martev ◽  
Z.H Barber ◽  
M.G Blamire
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Plasma Plume ◽  
Pulsed Laser ◽  
Optical Emission ◽  
Laser Deposition ◽  
Mgb2 Thin Films

Morphological design of complex oxides during pulsed-laser deposition: The role of plasma-plume expansion

2019 ◽  
Vol 126 (18) ◽  
pp. 184301
Author(s):  
D. Del Gaudio ◽  
C. T. Boone ◽  
K. Sallans ◽  
E. Mason ◽  
A. J. Williamson ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Plasma Plume ◽  
Pulsed Laser ◽  
Complex Oxides ◽  
Laser Deposition ◽  
Plume Expansion

Characteristics of Laser-Ablated Plasma and Properties Of Diamond-Like Carbon Film In Pulsed Laser Deposition

2000 ◽  
Vol 648 ◽  
Author(s):  
Yukihiko Yamagata ◽  
Tamiko Ohshima ◽  
Tomoaki Ikegami ◽  
Raj K. Thareja ◽  
Kenji Ebihara ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Laser Energy ◽  
Carbon Film ◽  
Pulsed Laser ◽  
Optical Emission ◽  
Ccd Camera ◽  
Laser Deposition ◽  
Diamond Like Carbon ◽  
Diamond Like Carbon Film ◽  
Swan Band

AbstractCharacteristics of laser-ablated carbon plasma and properties of diamond-like carbon film in KrF pulsed laser deposition were investigated using laser-induced fluorescence (LIF) and optical emission spectroscopy. Two-dimensional LIF images of C2 (Swan band, d3Φg – a3Φu) and C3 (Comet Head System, A1Φu –X1Σg+) molecules were detected as a function of laser energy density by narrow band pass filters and an intensified CCD camera. C2 LIF intensity is found to be weaker in the central part of the plume than that at the periphery at incident energy greater than 6 J/cm2. It is conjectured that C2 molecules are dissociated by collision with energetic species in the central part of the ablation plume, and degrade the diamond-like property of deposited films.

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