Dissociation dynamics of a model diatomic species in an intense pulsed laser field: a time dependent Fourier grid Hamiltonian approach

1992 ◽  
Vol 172 (3) ◽  
pp. 155-161 ◽  
Author(s):  
S. Adhikari ◽  
S.P. Bhattacharyya
Keyword(s):  
Laser Field ◽  
Pulsed Laser ◽  
Time Dependent ◽  
Hamiltonian Approach ◽  
Dissociation Dynamics

scholarly journals Hamiltonian Approach to Magnetic Fields with Toroidal Surfaces

1985 ◽  
Vol 40 (10) ◽  
pp. 959-967
Author(s):  
A. Salat
Keyword(s):  
Magnetic Field ◽  
Hamiltonian System ◽  
Magnetic Fields ◽  
Constant Pressure ◽  
Time Dependent ◽  
Hamiltonian Approach ◽  
One Dimensional ◽  
Mhd Equilibrium ◽  
Magnetic Surfaces ◽  
Rotational Transform

The equivalence of magnetic field line equations to a one-dimensional time-dependent Hamiltonian system is used to construct magnetic fields with arbitrary toroidal magnetic surfaces I = const. For this purpose Hamiltonians H which together with their invariants satisfy periodicity constraints have to be known. The choice of H fixes the rotational transform η(I). Arbitrary axisymmetric fields, and nonaxisymmetric fields with constant η(I) are considered in detail.Configurations with coinciding magnetic and current density surfaces are obtained. The approach used is not well suited, however, to satisfying the additional MHD equilibrium condition of constant pressure on magnetic surfaces.

An analytical modeling of time dependent pulsed laser melting

1999 ◽  
Vol 86 (5) ◽  
pp. 2836-2846 ◽  
Author(s):  
Vladimir N. Tokarev ◽  
Alexander F. H. Kaplan
Keyword(s):  
Analytical Modeling ◽  
Pulsed Laser ◽  
Time Dependent ◽  
Laser Melting

High-order harmonic generation with a single-color mid-infrared laser field by frequency-chirping

2019 ◽  
Vol 33 (13) ◽  
pp. 1950122 ◽  
Author(s):  
Yunhui Wang ◽  
Dandan Song ◽  
Qiang Zuo ◽  
Hong Wu ◽  
Zhihong Yang
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
Infrared Laser ◽  
Pulse Generation ◽  
High Order ◽  
Time Dependent ◽  
Mid Infrared ◽  
High Order Harmonic ◽  
Isolated Attosecond Pulse ◽  
Frequency Chirping

By numerically solving the time-dependent Schrödinger equation for helium atoms in a single mid-infrared laser field, we explore the frequency-chirping effect of laser field on high-order harmonic and isolated attosecond pulse generation. One or two ultrabroad supercontinuum harmonic plateaus can be controlled through modulating the laser field frequency by a small time-dependent signal. Under the best chirping condition, an ultrashort 2.2 as pulse can be obtained by Fourier transformation with the bandwidth of 782 eV. Furthermore, we explain the harmonic generation physical mechanisms by classical ionizing and returning energy maps and time–frequency analyzes.

Slim: a Personal Computer Based Software for Simulation of Laser Interaction with Materials

1991 ◽  
Vol 236 ◽  
Author(s):  
Rajiv K. Singh ◽  
John Viatella
Keyword(s):  
Laser Irradiation ◽  
Personal Computer ◽  
Rapid Heating ◽  
Pulsed Laser ◽  
Laser Pulses ◽  
Time Dependent ◽  
Intense Laser ◽  
Laser Interaction ◽  
History Of ◽  
Short Laser Pulses

AbstractA user-friendly, personal computer (PC) based routine called SLIM [Simulation of Laser Interaction with Materials] has been developed to understand the non-equilibrium effects of high intensity, short laser pulses on different materials. By employing an accurate implicit finite difference scheme with varying spatial and temporal node dimensions, the time-dependent thermal history of laser-irradiated material can be accurately and quickly determined. This program can take into account the temperature dependent optical and thermal properties of the solid, time dependent laser pulse intensity, and formation and propagation of the melt and/or vaporization interfaces induced by intense laser irradiation. The program can also simulate thermal effects on multilayer structures exposed to pulsed laser irradiation It is expected that this simulation routine will be indispensable to all researchers working in the area of pulsed laser processing of materials, including rapid heating, melting, annealing, laser doping, laser deposition of thin films and laser solidification processing.

Resonant scattering of photon by electron in the presence of the pulsed laser field

Laser Physics ◽  
2011 ◽  
Vol 21 (9) ◽  
pp. 1675-1687 ◽  
Author(s):  
A. I. Voroshilo ◽  
S. P. Roshchupkin ◽  
V. N. Nedoreshta
Keyword(s):  
Laser Field ◽  
Pulsed Laser ◽  
Resonant Scattering
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