Self-pinching of pulsed laser beams during filamentary propagation

AbstractWe have developed a new pulsed laser deposition technique using two Nd:YAG laser beams for the nucleation of silicon carbide (SiC) crystalline nano-particles and single crystalline SiC thin films. Transmission electron microscopy and atomic force microscopy observation suggest that several nanometer size SiC particles can be prepared by the new pulsed laser deposition (PLD) method using two Nd:YAG laser beams (1064nm and 532nm). X ray photoelectron spectroscopy measurements suggest that the silicon/carbon composition ratio of the prepared SiC thin films can be controlled by laser fluence and wavelength.

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Microraman Study of Laser Ablated Gaas

MRS Proceedings ◽

10.1557/proc-354-687 ◽

1994 ◽

Vol 354 ◽

Author(s):

C. García ◽

J. Jiménez ◽

A.C. Prieto ◽

J. Ramos ◽

L.F. Sanz

Keyword(s):

Chemical Composition ◽

Structural Changes ◽

Pulsed Laser ◽

Optical Interferometry ◽

Laser Beams ◽

Surface Inspection ◽

Dopant Distribution ◽

Microraman Spectroscopy

AbstractMorphologic and structural changes induced by UV pulsed laser beams on GaAs are studied by means of surface inspection (optical interferometry) and MicroRaman spectroscopy. Crystal order and chemical composition (dopant distribution ) are shown to be changed by the ablation.

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Optimum laser parameters for 1D radiation pressure acceleration

Laser and Particle Beams ◽

10.1017/s0263034615000336 ◽

2015 ◽

Vol 33 (3) ◽

pp. 387-396 ◽

Cited By ~ 5

Author(s):

Peter Schmidt ◽

Oliver Boine-Frankenheim ◽

Peter Mulser

Keyword(s):

Laser Pulse ◽

Radiation Pressure ◽

Pulsed Laser ◽

Laser Beams ◽

Body Density ◽

One Dimensional ◽

Acceleration Mechanism ◽

The Past ◽

Commercial Code ◽

Foil Target

AbstractLaser ion acceleration (Wilks et al., 2001; Passoni et al., 2010) has become an interesting field of research in the past years. Several experiments, such as LIGHT (Schollmeier et al., 2008; Bagnoud et al., 2010; Busold et al., 2013; 2014a; 2014b) are performed worldwide. High intense, pulsed laser beams are used to generate and accelerate a plasma. For higher laser intensities (>1021 W cm−1), simulations (Esirkepov et al., 2004; Macchi et al., 2005; 2009; 2010; Robinson et al., 2008; Rykovanov et al., 2008; Henig et al., 2009; Schlegel et al., 2009; Shoucri et al., 2011; 2013; 2014; Kar et al., 2012; Korzhimanov et al., 2012; Shoucri, 2012) have revealed a new acceleration mechanism: The Radiation Pressure Acceleration. The entire foil target is accelerated by the radiation pressure of the laser pulse. Ideally, a sharp peak spectrum is generated, with energies up to GeV and nearly solid body density. This work faces on a detailed analysis of the acceleration mechanism in order to develop the optimum laser- and target parameters for the process. The analysis is supported by one-dimensional PIC simulations, using the commercial code VSim© Tech-X (2015).

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Harmonic Generation and Mixing of CaWO4:Nd3+and Ruby Pulsed Laser Beams in Piezoelectric Crystals

Physical Review ◽

10.1103/physrev.128.2175 ◽

1962 ◽

Vol 128 (5) ◽

pp. 2175-2179 ◽

Cited By ~ 36

Author(s):

Robert C. Miller ◽

Albert Savage

Keyword(s):

Harmonic Generation ◽

Pulsed Laser ◽

Laser Beams ◽

Piezoelectric Crystals

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Heat Conduction in a Moving Semi-infinite Solid Subjected to Pulsed Laser Irradiation

Journal of Heat Transfer ◽

10.1115/1.3246977 ◽

1986 ◽

Vol 108 (3) ◽

pp. 597-601 ◽

Cited By ~ 74

Author(s):

M. F. Modest ◽

H. Abakians

Keyword(s):

Heat Conduction ◽

Laser Irradiation ◽

Pulsed Laser ◽

The Body ◽

Laser Beams ◽

One Dimensional ◽

Body Of Knowledge ◽

Dimensional Diffusion ◽

Complicated Geometries ◽

Pulsed Laser Irradiation

Heat conduction in a moving semi-infinite medium subject to laser irradiation is considered. The body of knowledge of exact analytical solutions for Gaussian laser irradiation is expanded to include pulsed lasers, and laser beams that penetrate into the medium with exponential decay. For applications with complicated geometries (laser melting and evaporation), a simple integral method, based on one-dimensional diffusion, is presented, and its range of validity determined.

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