Journal of Applied Physics

High-peak-power surface high-harmonic generation at extreme ultra-violet wavelengths from a tape

B. H. Shaw, J. van Tilborg, T. Sokollik, C. B. Schroeder, W. R. McKinney et al.
Solid-based surface high-harmonic generation from a tape is experimentally studied. By operating at mildly relativistic normalized laser strengths a<~0.2, harmonics up to the 17th order are efficiently produced in the coherent wake emission (CWE) regime. CWE pulse properties, such as divergence, ene ... [J. Appl. Phys. 114, 043106 (2013)] published Thu Jul 25, 2013.

Geometrical scaling law for laser shock processing

Xianqian Wu, Qingming Tan, and Chenguang Huang
Scaling approach to laser shock processing is studied by dimensional analysis and numerical simulation. The essential dimensionless parameters controlling the shock effect are studied, and a geometrical scaling law correlating the input laser parameters and the output strengthening effect parameters ... [J. Appl. Phys. 114, 043105 (2013)] published Thu Jul 25, 2013.

Effects of substrate-induced-strain on the electrical properties and laser induced voltages of tilted LaCaMnO thin films

Ji Ma, Hui Zhang, Qingming Chen, and Xiang Liu
LaCaMnO thin films have been prepared on vicinal cut LaAlO, (LaAlO)-(SrAlTaO), and SrTiO (001) substrates by pulsed laser deposition. The influence of the substrate on the electrical transport properties and laser induced voltage (LIV) effect of the films was investigated. The high insulator to meta ... [J. Appl. Phys. 114, 043708 (2013)] published Thu Jul 25, 2013.

Role of zinc coating at liquid-vapor interface during laser material processing of zinc coated steel

Seung Hwan Lee and Jyoti Mazumder
In laser material processing, one of the major interests is characterizing interfacial phenomena induced by thermal phase changes of materials. The interfacial characteristics in the laser processing of multi-coated materials show different behaviors compared to those of single material processing. ... [J. Appl. Phys. 114, 044903 (2013)] published Wed Jul 24, 2013.

Time evolution analysis of the electron distribution in Thomson/Compton back-scattering

V. Petrillo, A. Bacci, C. Curatolo, C. Maroli, L. Serafini et al.
We present the time evolution of the energy distribution of a relativistic electron beam after the Compton back-scattering with a counter-propagating laser field, performed in the framework of the Quantum Electrodynamics, by means of the code CAIN. As the correct angular distribution of the spontane ... [J. Appl. Phys. 114, 043104 (2013)] published Wed Jul 24, 2013.

Cold atomic beam ion source for focused ion beam applications

B. Knuffman, A. V. Steele, and J. J. McClelland
We report measurements and modeling of an ion source that is based on ionization of a laser-cooled atomic beam. We show a high brightness and a low energy spread, suitable for use in next-generation, high-resolution focused ion beam systems. Our measurements of total ion current as a function of ion ... [J. Appl. Phys. 114, 044303 (2013)] published Tue Jul 23, 2013.

Multi-band photoluminescence in TiO nanoparticles-assembled films produced by femtosecond pulsed laser deposition

D. K. Pallotti, E. Orabona, S. Amoruso, C. Aruta, R. Bruzzese et al.
We present an analysis of the photoluminescence (PL) properties of nanostructured titania (TiO) thin films produced by femtosecond pulsed laser deposition. Up to four PL bands are evidenced and analyzed, corresponding to radiative transitions ranging from the blue/violet to the near-infrared. The PL ... [J. Appl. Phys. 114, 043503 (2013)] published Mon Jul 22, 2013.

Study of the spatial coherence of high order harmonic radiation generated from pre-formed plasma plumes

M. Kumar, H. Singhal, J. A. Chakera, P. A. Naik, R. A. Khan et al.
A study of the spatial coherence of the high order harmonic radiation generated by the interaction of 45 fs Ti:sapphire laser beam with carbon (graphite) plasma plume has been carried out using Young's double slit interferometry. It is observed that the spatial coherence varies with harmonic order, ... [J. Appl. Phys. 114, 033112 (2013)] published Fri Jul 19, 2013.

Quasi-equilibrium size distribution of subcritical nuclei in amorphous phase change AgIn-SbTe

Kristof Darmawikarta, Bong-Sub Lee, Robert M. Shelby, Simone Raoux, Stephen G. Bishop et al.
We investigate the effect of low temperature annealing or of extended storage at room temperature on the subsequent nucleation behavior of amorphous AgIn-incorporated SbTe (AIST), a material for phase change memories. Time-resolved reflectivity measurements during pulsed laser crystallization reveal ... [J. Appl. Phys. 114, 034904 (2013)] published Fri Jul 19, 2013.

Three-dimensional extreme ultraviolet emission from a droplet-based laser-produced plasma

A. Z. Giovannini and Reza S. Abhari
The emission of extreme ultraviolet radiation in a 2% bandwidth centered at 13.5 nm (in-band) is measured in one hemisphere. The targets of the laser are tin droplets. In-band emission is measured at angles from the laser axis larger than 120 degrees . Analytical models representing the physical pro ... [J. Appl. Phys. 114, 033303 (2013)] published Thu Jul 18, 2013.

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