Parametric Effects on Plasma Emission Produced during Excimer Laser Ablation of YBa2Cu3O7-x

Geyer, T. J.; Weimer, Wayne A.

doi:10.1366/0003702904417454

Cited by 25 publications

(9 citation statements)

References 35 publications

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“…The thin-film quality from the PLD depends on the various parameters such as wavelength of the laser, energy, ambient gas pressure, pulsed duration, and the distance of the target to the substrate [19]. The ablation process during the deposition may control and monitor by using laser-induced fluorescence [20], laser ablation molecular isotopic spectroscopy [21], and optical emission spectroscopy [22]. The morphology of the deposited thin films is also affected by the substrate temperature.…”

Section: Laser Beam Evaporation (Pulsed-laser Deposition)mentioning

confidence: 99%

Advance Deposition Techniques for Thin Film and Coating

Jilani¹,

Abdel-wahab²,

HosnyHammad³

2017

Modern Technologies for Creating the Thin-Film Systems and Coatings

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Thin films have a great impact on the modern era of technology. Thin films are considered as backbone for advanced applications in the various fields such as optical devices, environmental applications, telecommunications devices, energy storage devices, and so on . The crucial issue for all applications of thin films depends on their morphology and the stability. The morphology of the thin films strongly hinges on deposition techniques. Thin films can be deposited by the physical and chemical routes. In this chapter, we discuss some advance techniques and principles of thin-film depositions. The vacuum thermal evaporation technique, electron beam evaporation, pulsed-layer deposition, direct current/radio frequency magnetron sputtering, and chemical route deposition systems will be discussed in detail.

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Section: Laser Beam Evaporation (Pulsed-laser Deposition)mentioning

confidence: 99%

Advance Deposition Techniques for Thin Film and Coating

Jilani¹,

Abdel-wahab²,

HosnyHammad³

2017

Modern Technologies for Creating the Thin-Film Systems and Coatings

View full text Add to dashboard Cite

show abstract

“…Ionized atoms, molecules, and radicals present in a laser plume when chemical reactions in plasma are insignificant (as in the case of deposition of oxide films [16]) will facilitate the mapping of the stoichiometry of SHUAIBOV, CHUCHMAN the starting compound on the substrate, initiating electron exchange. Using Eq.…”

Section: Resultsmentioning

confidence: 99%

The Emission Characteristics of Laser Plume from the PbGa2S4 Crystal Surface

Шуаибов

Чучман

2005

High Energy Chem

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Averaged spectra and oscilloscope traces of emission of laser plasma in vacuum produced by the impact of neodymium laser radiation ( τ = 20 ns, λ = 1.06 µ m, f = 12 Hz, W = 10 8 -10 9 W/cm 2 ) on Pb, Ga, and polycrystalline PbGa 2 S 4 targets were studied. From spectroscopic diagnostic data, the electron temperature, the recombination time of singly charged ions, and the number density of electrons in the laser plume of lead gallium sulfide were determined. An analysis of the results is given.

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“…This may be formed by the evolution of the laser plasma during its movement [11] and as a result of differences in the method and amount of applied energy within the target during its layering by previous laser pulses [12]. Thus, it was demonstrated [10] that different plasma elements move in different directions during laser ablation of Cd 1-x Mn x Te.…”

mentioning

confidence: 99%

“…Thus, it was demonstrated [10] that different plasma elements move in different directions during laser ablation of Cd 1-x Mn x Te. The laser plume of YBa 2 Cu 3 O 7-x was studied by emission spectroscopy with high space-time resolution [11]. The effects of gas pressure in a vacuum chamber and the power of laser radiation on the emission properties of the plasma were studied.…”

mentioning

confidence: 99%

Formation of excited states of atoms and ions in laser plasma from CuInS2

Чучман

Шуаибов

2008

J Appl Spectrosc

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Emission spectra and the energy distribution of the excited-state population density of atoms and ions in erosion laser plasma from CuInS 2 with various crystal-structure orderings are analyzed. It is shown that increased ordering of the target crystal structure causes the excited-state energies of indium atoms generated in the laser erosion plume to increase and that sulfur atoms always emit only in transitions from highly excited states. The ratio of relative ion concentrations in the laser plasma plume is Cu + /In + /S + = 0.3/0.08/2, which corresponds neither to the atomic ratio of Cu/In/S (1/1/2) in the target nor to the ratio of ionization energies. The results are explained by recombination processes for ions and by the atomization specifics of the CuInS 2 target exposed to long-wavelength radiation. The atomization consists essentially of dissociative processes expressed by CuInS 2 → CuInS + S and CuInS 2 → Cu + InS + S. The electron temperature of polycrystal (single-crystal) plasma at a distance of 1 mm from the target is 0.3 eV (0.4 eV) for atoms and 1.3 eV (2.7 eV) for ions and varies negligibly for plasma up to a distance of 7 mm from the target.Key words: erosion laser plasma, emission spectroscopy, excited-state population densities of atoms and ions, electron temperature, atomization of CuInS2 target. Introduction.Laser spectral analysis is one of the most common and reliable methods for finding the qualitative and quantitative compositions of matter [1]. The principal difficulties and therefore potential for increasing the information value of emission analysis of plasma produced by laser ablation of multi-component targets are explaining the atomization specifics of the target [1], forming excited states of atoms and ions [2], and knowing the space-time evolution of the laser plasma plume [3].The amount of various atoms vaporized from a target of a multi-component alloy can be found by knowing the fundamental thermal physical characteristics of the separate elements in the alloy. Thus, a coefficient normalizing the intensity ratio of diagnostic spectral lines for atoms of the various elements can be calculated in order to determine the stoichiometric ratio of these elements in the target [4]. Spectroscopic analysis for a multi-component chemical compound is complicated because of, first, specifics of the destruction of chemical bonds where, as shown previously [2], selective removal of ions from the surface of ionic crystals is possible through the action of laser radiation; second, the presence of many methods for destroying molecules, which the laser parameters facilitate [5]; and third, possibilities for chemical reactions on the surface of a multi-component target and in its vapor, especially with incoherent melting where the compound is separated into several phases of different compositions [6]. It was concluded [5] that Rydberg molecular states are formed through breakdown of molecular vapor by laser radiation. The decomposition of such molecules and their ionization and recombination det...

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Parametric Effects on Plasma Emission Produced during Excimer Laser Ablation of YBa₂Cu₃O_7-x

Cited by 25 publications

References 35 publications

Advance Deposition Techniques for Thin Film and Coating

Advance Deposition Techniques for Thin Film and Coating

The Emission Characteristics of Laser Plume from the PbGa2S4 Crystal Surface

Formation of excited states of atoms and ions in laser plasma from CuInS2

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