Results 261 to 270 of about 8,444,233 (303)

Polarization of a polar gas by external and internal electric fields

American Journal of Physics, 1977
Linear-polar molecules in an external field contribute to two kinds of polarization effects which may be described in classical terms. First, the external field E produces a torque on each molecule which tends to align its electric dipole moment μ in the direction of the field.
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Electric field meter with a dipole antenna in an elliptically polarized electric field

Measurement Techniques, 1994
A model of an electric field meter with a dipole antenna is analyzed. The model takes into account the fact that the meter incorporates other elements with a conducting surface in addition to the dipole antenna, viz.: a matching device, a signal cable, and a voltmeter.
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Drift of Spiral Waves Controlled by a Polarized Electric Field

Journal of Chemical Physics, 2006
The drift behavior of spiral waves under the influence of a polarized electric field is investigated in the light that both the polarized electric field and the spiral waves possess rotation symmetry. Numerical simulations of a reaction-diffusion model show that the drift velocity of the spiral tip can be controlled by changing the polarization mode of
Jiang-Xing Chen, Hong Zhang, You-Quan Li
exaly   +3 more sources

Polarized Fluorescence in an Electric Field

1981
As for the other electro-optics effects, the change of polarization of fluorescence observed in an electric field results from the orientation of the molecules. The specific advantages which were looked for when we started to develop the technique1 were, when compared to the more classical electric birefringence and dichroism: the possibility of ...
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Polarization tensor of a photon in an electric field

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2017
Abstract The polarization operator is investigated at arbitrary photon energy in a constant and homogeneous electric field of the strength E. When the photon energy is less than the vacuum energy = eE ℏ / mc , the found probability describes the absorption of a soft photon by virtual electron and positron in an electric field. At this energy,
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Polarization spectroscopy of gaseous tropolone in a strong electric field

The Journal of Chemical Physics, 2004
We report studies of polarization spectroscopy of gaseous tropolone in a strong electric field using resonantly enhanced multiphoton ionization. The electric field induces localization of the tunneling proton between the two equivalent oxygen atoms.
Chengyin, Wu, Yonggang, He, Wei, Kong
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Gauge invariance and the electric polarization field

Molecular Physics, 1996
Physical observables associated with interactions between electromagnetic radiation and charged particles are required to be gauge invariant, i.e. independent of the gauge of the field potentials. Gauge invariance implies the involvement of the electric polarization field, P(x), in electrodynamics, but leaves undetermined the transverse component P(x)⊥
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Magnetic-Field-Induced Electric Polarization in Multiferroic Nanostructures

Physical Review Letters, 2005
Magnetic-field-induced electric polarization in nanostructured multiferroic composite films was studied by using the Green's function approach. The calculations showed that large magnetic-field-induced polarization could be produced in multiferroic nanostructures due to enhanced elastic coupling interaction.
Ce-Wen, Nan, Gang, Liu, Yuanhua, Lin, Haydn, Chen   +3 more
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Influence of an electric field on the spin polarization in semiconductor superlattices

Journal of Physics: Condensed Matter, 2005
The influence of a quantizing electric field on the spin polarization is treated for semiconductor superlattices with a Rashba spin-orbit interaction. For weakly coupled superlattices, the quantum kinetic equation for the canonically transformed density matrix is analytically solved.
P, Kleinert, V V, Bryksin
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Electron polarization in a quantum well with uniform electric field

Solid State Communications, 1991
AbstractThe polarization of a quantum electron confined in square, parabolic, and triangular quantum wells is calculated numerically. The aim of the present calculations is to compare the results for various geometries.
K. F. Ilaiwi, M. Tomak
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