Enhanced Scattering and Anomalous Absorption of Light Due to Decay into Plasma Waves

1969 ◽  
Vol 12 (11) ◽  
pp. 2362 ◽  
Author(s):  
M. Bornatici
Keyword(s):  
Plasma Waves ◽  
Anomalous Absorption ◽  
Absorption Of Light

scholarly journals Soliton emission in the forced non-linear Schrödinger equation

1986 ◽  
Vol 4 (3-4) ◽  
pp. 545-553 ◽  
Author(s):  
O. Larroche ◽  
M. Casanova ◽  
D. Pesme ◽  
M. N. Bussac
Keyword(s):  
Schrödinger Equation ◽  
Schrodinger Equation ◽  
Reasonable Agreement ◽  
Critical Density ◽  
Plasma Waves ◽  
Resonant Absorption ◽  
Direct Numerical Simulations ◽  
Absorption Of Light ◽  
Non Linear ◽  
Soliton Generation

The plasma waves generated by resonant absorption of light in the vicinity of the critical density of laser-produced plasmas, are modelled by a non-linear Schrödinger equation with additional terms accounting for the presence of a source and the inhomogeneity of the medium.We use an average lagrangian method to describe the behaviour of the solutions of this equation in the range of parameters where periodic soliton generation occurs. An iterating scheme describing the successive emission of solitons yields values for this range of parameters which are in reasonable agreement with those found from direct numerical simulations of the non-linear Schrödinger equation.

Absorption of Light at Oblique Incidence on a Plasma Layer

1972 ◽  
Vol 50 (24) ◽  
pp. 3184-3192
Author(s):  
N. H. Burnett
Keyword(s):  
Laser Heating ◽  
Oblique Incidence ◽  
Plasma Layer ◽  
Plasma Waves ◽  
Resonance Absorption ◽  
Linear Coupling ◽  
Enhanced Absorption ◽  
Absorption Of Light ◽  
Bounded Plasma ◽  
Longitudinal Plasma

Two effects are examined which may lead to enhanced absorption of light by sharply bounded plasma layers at oblique incidence. The first is a resonance absorption caused by interference of light reflected from the front and rear boundaries of the layer. The second is the linear coupling of the incident transverse wave into longitudinal plasma waves. It is thought that these effects may be useful in obtaining increased efficiency in laser heating of plasmas.

Anomalous absorption of light under nonresonance conditions

2007 ◽  
Vol 37 (5) ◽  
pp. 453-464
Author(s):  
A I Parkhomenko ◽  
A M Shalagin
Keyword(s):  
Anomalous Absorption ◽  
Absorption Of Light

Anomalous scattering and absorption of light by decay into plasma waves

1969 ◽  
Vol 1 (14) ◽  
pp. 713-717 ◽  
Author(s):  
M. Bornatici ◽  
A. Cavaliere ◽  
F. Engelmann
Keyword(s):  
Plasma Waves ◽  
Anomalous Scattering ◽  
Absorption Of Light

LACBED with Quantitative Anomalous Absorption Corrections

1990 ◽  
Vol 48 (2) ◽  
pp. 528-529
Author(s):  
C.J. Rossouw ◽  
L.J. Allen ◽  
P.R. Miller
Keyword(s):  
Momentum Transfer ◽  
Scattering Amplitude ◽  
Incident Beam ◽  
Waller Factor ◽  
Beam Momentum ◽  
Anomalous Absorption ◽  
Quantitative Calculation ◽  
Ewald Sphere ◽  
Image Position ◽  
Incident Beam Energy

An Einstein model for thermal diffuse scattering (TDS) has enabled quantitative calculation of the absorptive potential V'(r). This allows anomalous absorption to be accounted for in LACBED contrast. Fourier coefficients Vg-h of the absorptive component from each atom α are calculated from integrals of the formwhere fα is the scattering amplitude and M(Q) the Debye-Waller factor. Integration over the Ewald sphere (dΩ) requires the momentum transfer q to have values up to 2ko (the incident beam momentum). Dynamical ‘dechannelling’ is accounted for by the terms g ≠ h. The crystal absorptive potential is obtained by coherently summing over these atomic absorptive potentials within the unit cell. Unlike the elastic potential, the absorptive potential is a strong function of incident beam energy Eo, since the range of momentum transfer q and associated solid angles dΩ change with the Ewald sphere radius.Fig. 1 shows a LACBED pattern of the zeroth order beam from Si aligned along a <001> zone axis.

Absorption of light in antiferromagnetic dielectrics

1969 ◽  
Vol 98 (5) ◽  
pp. 27-70 ◽  
Author(s):  
V.V. Eremenko ◽  
A.I. Belyaeva
Keyword(s):  
Absorption Of Light
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