Structure and optical properties of amorphous diamond films prepared by ArF laser ablation as a function of carbon ion kinetic energy

1998 ◽  
Vol 73 (18) ◽  
pp. 2591-2593 ◽  
Author(s):  
Vladimir I. Merkulov ◽  
Douglas H. Lowndes ◽  
G. E. Jellison ◽  
A. A. Puretzky ◽  
D. B. Geohegan
Keyword(s):  
Optical Properties ◽  
Laser Ablation ◽  
Kinetic Energy ◽  
Diamond Films ◽  
Carbon Ion ◽  
Ion Kinetic Energy ◽  
Arf Laser

Amorphous Diamond Films Deposited by Pulsed-Laser Ablation: the Optimum Carbon-Ion Kinetic Energy and Effects of Laser Wavelength

1998 ◽  
Vol 526 ◽  
Author(s):  
Douglas H. Lowndes ◽  
Vladimir I. Merkulov ◽  
A. A. Puretzky ◽  
D. B. Geohegan ◽  
G. E. Jellison ◽  
...  
Keyword(s):  
Optical Properties ◽  
Laser Ablation ◽  
Kinetic Energy ◽  
Energy Gap ◽  
Spot Size ◽  
Laser Wavelength ◽  
Film Deposition ◽  
Carbon Ions ◽  
Carbon Ion ◽  
Beam Focusing

AbstractA systematic study has been made of changes in the bonding and optical properties of hydrogen-free tetrahedral amorphous carbon (ta-C) films, as a function of the kinetic energy of the incident carbon ions measured under film-deposition conditions. Ion probe measurements of the carbon ion kinetic energies produced by ArF and KrF laser ablation of graphite are compared under identical beam-focusing conditions. Much higher C+ kinetic energies are produced by ArF-laser ablation than by KrF for any given fluence and spot size. Electron energy loss spectroscopy and scanning ellipsometry measurements of the sp3 bonding fraction, plasmon energy, and optical properties reveal a well-defined optimum kinetic energy of 90 eV to deposit ta-C films having the largest sp3 fraction and the widest optical (Tauc) energy gap (equivalent to minimum near-gap optical absorption). Tapping-mode atomic force microscope measurements show that films deposited at near-optimum kinetic energy are extremely smooth, with rms roughness of only ~ 1 Å over distances of several hundred nm, and are relatively free of particulates.

Ion Kinetic Energy Distributions and Mechanisms of Pulsed Laser Ablation on Al

2008 ◽  
Vol 112 (42) ◽  
pp. 16556-16560 ◽  
Author(s):  
Jon I. Apiñániz ◽  
Borja Sierra ◽  
Roberto Martínez ◽  
Asier Longarte ◽  
Carolina Redondo ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Kinetic Energy ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Energy Distributions ◽  
Ion Kinetic Energy ◽  
Kinetic Energy Distributions

Ejected Product Energy Distributions from Laser Ablated Solids

1988 ◽  
Vol 129 ◽  
Author(s):  
H. Helvajian ◽  
R. P. Welle
Keyword(s):  
Laser Ablation ◽  
Kinetic Energy ◽  
Product Formation ◽  
Uv Laser ◽  
Energy Distributions ◽  
Laser Threshold ◽  
Ion Kinetic Energy ◽  
The Mean ◽  
Mean Kinetic Energy ◽  
Kinetic Energy Distributions

ABSTRACTAt laser threshold fluences near ion product formation, we have measured the ejected ion kinetic-energy distributions from the UV laser ablation of crystalline aluminum and silver targets. The mean kinetic energy is found to be hyperthermal.

scholarly journals Ion kinetic energy control in cross-beam pulsed laser ablation on graphite targets

2007 ◽  
Vol 59 ◽  
pp. 728-731
Author(s):  
C Sánchez Aké ◽  
H Sobral1 ◽  
P Ramos-Alvarez ◽  
C Lemen ◽  
M Villagrán-Muniz
Keyword(s):  
Laser Ablation ◽  
Kinetic Energy ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Energy Control ◽  
Ion Kinetic Energy

Plasma and DLC Film Characteristics from Pulsed Laser Ablation Of Single Crystal Graphite and Amorphous Carbon: A Comparative Study Employing Electrostatic Probe Measurements

2000 ◽  
Vol 617 ◽  
Author(s):  
R. M. Mayo ◽  
J. W. Newman ◽  
A. Sharma ◽  
Y. Yamagata ◽  
J. Narayan
Keyword(s):  
Laser Ablation ◽  
Kinetic Energy ◽  
Single Crystal ◽  
Amorphous Carbon ◽  
Plasma Plume ◽  
Laser Energy ◽  
Heavy Particle ◽  
Complex Molecules ◽  
Ion Kinetic Energy ◽  
Lower Temperature

AbstractIn an ongoing effort to investigate plasma plume features yielding high quality DLC films, we have applied plasma plume diagnosis and film characterization to examine plume character distinction from KrF laser ablation of both amorphous carbon (a-C) and single crystal graphite (SCG) targets- The advancing plasma plume produced by these structurally different targets are observed to possess quantitatively similar total heavy particle inventory, ionized fraction, and electron thermal content, yet quite different ion kinetic energy, plume profile, C2 formation mechanism, and concentration of complex molecules. All data support the conclusion that the SCG target plasma plume is populated with heavier, more complex molecules than those in a-C which have been shown to be predominantly comprised of C and C+ under vacuum conditions with the addition of C2 at high fill pressure. Significantly smaller plume profile peaking factor, less energetic and slightly lower temperature plume conditions, laser energy (E1) dependent plume peaking, harder films produced at lower El strongly heterogeneous films, and lesser plume energy attenuation in high pressure background fill in SCG target plumes all support the conclusion of more massive plume species in SCG target plumes. Energy balance estimates indicate that ion kinetic energy dominates and that SCG target ablation liberates about twice the number of 12C atoms per unit El.

scholarly journals Ridge waveguide lasers in Nd:GGG crystals produced by swift carbon ion irradiation and femtosecond laser ablation

2012 ◽  
Vol 20 (9) ◽  
pp. 9763 ◽  
Author(s):  
Yuechen Jia ◽  
Ningning Dong ◽  
Feng Chen ◽  
Javier R. Vázquez de Aldana ◽  
Sh. Akhmadaliev ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Ion Irradiation ◽  
Femtosecond Laser Ablation ◽  
Ridge Waveguide ◽  
Carbon Ion ◽  
Waveguide Lasers ◽  
Ridge Waveguide Lasers
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