A brief review of laser ablation mechanisms and applications is presented. Topics covered include polymer ablation, thin film deposition, tissue ablation, and chemical analysis.
NASA Astrophysics Data System (ADS)
This thesis concerns (1) the physics of laser ablation and (2) the materials science of thin films grown by Laser ablation deposition (LAD). The basic ablation mechanisms play an important role in determining the properties of thin films grown by LAD. ...
National Technical Information Service (NTIS)
A new model for the particle formation and ejection of laser ablation of a target for depositing high T(c) superconducting thin films is presented, by which the two features, film composition close to the ablated target and particle ejection along the nor...
The process of laser ablation of the thin film in solid or liquid phase in the before-evaporation regime is considered. The physical model of film ablation caused by thermal tension, occurring in the film by its fast laser heating, is proposed. The dependence of velocity of ...
... Title : Nd: YAG Laser Ablation of BaTiO3 Thin Films. ... Abstract : We have deposited thin films of barium titanate onto a variety of substrates, using ...
DTIC Science & Technology
The improved films are deposits using the novel technique of laser ablation. ... Simultaneously, pCBN thin films will be fabricated by laser ablation and ...
NASA Website
... Title : Characterization of Silicon Carbide Thin Films Deposited by Laser Ablation on 001 and 111 Silicon Wafers. Descriptive Note : Journal article,. ...
Laser ablation of bulk High Temperature Superconductor (HTS) material promises to provide a useful means of producing high quality HTS thin films. Mass spectrometric probes of the ablation plume provide a microscopic understanding of the ablation event an...
... TITANATES, *FERROELECTRIC MATERIALS, ABLATION, EXCIMERS, LASERS, MASS, PARAMETERS, PEROVSKITES, PRESSURE, RATES ...
The processes and applications of laser ablation deposition (LAD), also known as pulsed laser deposition (PLD), which is the deposition of a physical thin film, are introduced. The main advantages of this technique, when compared to other thin film deposi...
... ADP012271 TITLE: Laser Ablated Pure Non-Crystalline Co Thin Films for Inductors ... Trilayers Co/Cu/Co were also fabricated by this technique. ...
... SPAIN, MAGNETIZATION, LOOPS, ELECTROMAGNETISM, HYSTERESIS, FERROMAGNETIC MATERIALS, MAGNETIC DISKS, DOMAIN WALLS ...
... (MM). Descriptors : *THIN FILMS, *CRYSTAL GROWTH, *CHEMISORPTION, *ATOMIC STRUCTURE, ABLATION, ANNEALING, RAMAN ...
Thin titanium dioxide films are deposited on glass substrates by magnetron sputter deposition. They are irradiated in air, by means of a KrF excimer laser. The ablation rate is measured as a function of the laser fluence per pulse, F, and of the number of pulses, N. Above a fluence threshold, the films are ...
Thin films of silicon carbide are produced by using the technology of ion beam evaporation. Various analytical methods are used to analyze film thickness, film composition and crystallization for samples obtained with different target-substrate distances.
DOE Information Bridge
High-quality, high-temperature superconductor (HTSc) films can be grown by the pulsed laser ablation (PLA) process. This article provides a detailed introduction to the advantages and curent limitations of PLA for epitaxial film growth. Emphasis is placed...
Molybdenum films on a glass substrate are ablated from the glass side by picosecond laser pulses at fluences below 1 J/cm2, without damage. Thin films of chromium, titanium and platinum with thicknesses between 200 nm and 1 ?m were examined to investigate the underlying ablation mechanisms. For ...
The influence of thermal conduction into the substrate during excimer laser ablation of thin film ZnS on silicon has been investigated. An analytical solution of the heat diffusion equation for a two-layer system has been used to calculate temperature profiles within the film and substrate arising from laser ...
... growth of cubic boron nitride thin films on single crystal 100 silicon by using pulsed excimer laser ablation of a hexagonal boron nitride bulk target. ...
We report in this letter the amount of gold removed by ablation with a pulsed laser operating at 532 and 355 nm, by using a quartz crystal microbalance as a mass detector. The results indicate that for the 532 and 355 nm pulsed laser ablation of gold thin...
The ablation of thin films by single laser pulse is a well known technique with widespread industrial applications. Ablation occurs in a well defined power density region if a supported thin film is illuminated by a single laser pulse. In the literature there are a number ...
The transport dynamics of laser-ablated neutral/plasma plumes are of significant interest for film growth by pulsed-laser deposition of materials since the magnitude and kinetic energy of the species arriving at the deposition substrate are key processing...
Experiments were performed to understand laser-induced back-ablation of Al film targets with picosecond laser pulses. Al films deposited on the back surface of BK-7 substrates are ablated by picosecond laser pulses propagating into the Al film through the...
We investigate the ablation of SiO x thin films on fused silica substrates using single-pulse exposures at 193 nm and 248 nm. Two ablation modes are considered: front side (the surface of a film is irradiated from above) and rear side (a film is irradiated through its ...
Yttrium-Barium-Cooper-Oxide (YBCO) thin films are prepared using laser ablation. The orientation of the 0.2--0.3 (mu)m thin film is controlled using both substrate temperature and deposited buffer layers for epitaxial growth. Highly textured films a...
We report on aspects of resonant laser ablation (RLA) behavior for a number of sample types: metals, alloys, thin films, zeolites and soil. The versatility of RLA is demonstrated, with results on a variety of samples and in several mass spectrometers. In addition, the application to depth profiling of thin ...
on the target. At higher laser energy flux, when a laser pulse with a power density greater than ablation, with laser induced stress release in target samples, longitudinal and shear waves were transmitted-material interaction through detecting laser induced SAW, longitudinal and shear wave in target. Because AE transducers
E-print Network
We have studied periodic nanostructure formation processes on hard thin film surfaces in femtosecond laser ablation. Using diamond-like carbon films patterned with submicrometer-size stripes, we found that the nanoscale ablation is preferentially initiated by the enhancement of a local field on ...
The ablation-induced plasma physics at reduced ablation crater dimensions is experimentally investigated. Frequency doubled femtosecond laser pulses are tightly focused through objective lenses onto a Cr thin film coated on quartz wafer in order to obtain ablation craters of submicron lateral ...
Energy Citations Database
... Accession Number : ADD853928. Title : Synthesis of SiO2 Thin Films by Reactive Excimer Laser Ablation. Descriptive Note : Journal article,. ...
Recent developments in ferroelectric thin film deposition involving plasma based approaches, are described, which include (a) multi-magnetron. sputter deposition, (b) Multi-ion-beam reactive sputter (MIBERS) deposition, (c) Pulsed excimer laser ablation a...
The thin films of TiO(sub 2) have been investigated extensively in the last years, since they have a broad variety of applications, which owing to their less usual chemical, electrical and optical properties. In this work are presented the obtained result...
We investigate here the feasibility of increasing the energy density of thin-film capacitors by construction of a multi-layer capacitor device through ablation and redeposition of the capacitor materials using a high-power pulsed ion beam. The deposition ...
... Abstract : Thin films of barium titanate (BaTiO3) have been deposited by pulsed-laser ablation onto (001)-oriented MgO substrates. ...
Generation of low work function, stable compound thin films by laser ablation. Compound thin films with low work function can be synthesized by simultaneously laser ablating silicon, for example, and thermal evaporating an alkali metal into an oxygen environment. For ...
This proceedings contains papers on the following topics: Laser processing, pulsed laser deposition, Surface and thin film treatments, Laser ablation, Laser-matter interaction, Machining and microstructuring, Microsystems and microdevices.
... We have grown " thin films by laser ablation of powdered PIN compressed into a pellet. ... pellet, but for some later runs the substrate was placed ...
... has been achieved on single crystal wafers of ... of GaN on sapphire followed the ... Descriptors : *THIN FILMS, *CRYSTALS, ABLATION, CONTRAST ...
... Corporate Author : RESERVED SOURCE. Personal Author(s) : Takigawa, Yasuo ; Hemminger, John C. Report Date : 1994. ...
Excimer laser ablation was used to prepare thin films from bulk targets of Y-Ba-Cu-O, Sm-Ba-Cu-O, and Bi-Sr-Ca-Cu-O. The systematic variation in film thickness, stoichiometry, and microstructure, as a function of laser fluence and angle from the target su...
The paper presents a syntheses of the last data concerning the optimal parameters of the deposition process to obtain the best dynamic quality of HTS thin films in connection with the most precise dynamic measurement method known to date. The paper makes a comparison between the performances achieved by the classical dynamical surface resistance ...
Ferroelectric thin films of barium strontium titanate (BSTO) have been deposited on bare and metallized substrates by the pulsed laser ablation method under different oxygen ambients (150 mT and 50 mT). Under an oxygen pressure of 150 mT, the film composi...
The growth and properties of undoped and Mn-doped ZnGa thin-film phosphors on (100) MgO and glass substrates using pulsed laser ablation were investigated. Blue-white and green emission were observed for as-deposited undoped and Mn-doped films, respective...
The mechanisms of the laser ablation process for pulsed laser deposition thin film growth will be discussed by describing results from several implementable in situ diagnostic techniques, including gated ICCD photography, optical emission and absorption s...
Laser ablation of (GeTe)(85)Sn(15) thin films as a function of atmospheric exposure was monitored in real time by transient reflectivity. The observed optical changes were correlated with microstructural analysis. Among the key findings were that the presence of water in the atmosphere during laser irradiation of a ...
PubMed
Ultrashort pulse lasers have proven to have superior advantages over conventional continuous wave and long pulse lasers for ablation of thin metal films. Though several investigations have been carried out to understand the phenomena of ultrashort pulse laser machining, the effect of the beam polarization on ...
