Intense longitudinal electric fields generated from transverse electromagnetic waves

2004 ◽  
Vol 84 (19) ◽  
pp. 3855-3857 ◽  
Author(s):  
Godai Miyaji ◽  
Noriaki Miyanaga ◽  
Koji Tsubakimoto ◽  
Keiichi Sueda ◽  
Ken Ohbayashi
Keyword(s):  
Electric Fields ◽  
Electromagnetic Waves ◽  
Transverse Electromagnetic

MUTUAL NONLINEAR INTERACTION OF A NUMBER OF ELECTROMAGNETIC WAVES IN A PLASMA

1963 ◽  
Vol 41 (10) ◽  
pp. 1702-1711 ◽  
Author(s):  
Mahendra Singh Sodha ◽  
Carl J. Palumbo
Keyword(s):  
Wave Equation ◽  
Electric Fields ◽  
Current Density ◽  
Nonlinear Interaction ◽  
Electromagnetic Waves ◽  
Physical Significance ◽  
Mutual Interaction ◽  
Modulated Waves ◽  
Boltzmann's Equation ◽  
Uniform Plasma

In this communication the authors have obtained an expression for current density in a slightly ionized uniform plasma in the presence of a number of electric fields of different frequencies by solving the appropriate Boltzmann's equation. This expression along with the wave equation has been used to investigate the nonlinear mutual interaction of a number of electromagnetic waves, propagating in a plasma. Limitations of the present analysis have also been indicated and the physical significance of the results has been discussed. The technique has also been applied to investigate the mutual interaction of amplitude-modulated waves, and the results express a generalization of Luxembourg effect to a number of strong modulated waves.

Transverse Electromagnetic Waves withE→∥B→

1982 ◽  
Vol 48 (13) ◽  
pp. 837-838 ◽  
Author(s):  
Cheng Chu ◽  
Tihiro Ohkawa
Keyword(s):  
Electromagnetic Waves ◽  
Transverse Electromagnetic

scholarly journals Realization of acoustic spin transport in metasurface waveguides

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yang Long ◽  
Danmei Zhang ◽  
Chenwen Yang ◽  
Jianmin Ge ◽  
Hong Chen ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Electromagnetic Waves ◽  
Degrees Of Freedom ◽  
Transport Processes ◽  
Angular Momenta ◽  
Transverse Electromagnetic ◽  
Spin Texture ◽  
Momentum Coupling ◽  
Practical Implications ◽  
Spin Momentum

Abstract Spin angular momentum enables fundamental insights for topological matters, and practical implications for information devices. Exploiting the spin of carriers and waves is critical to achieving more controllable degrees of freedom and robust transport processes. Yet, due to the curl-free nature of longitudinal waves distinct from transverse electromagnetic waves, spin angular momenta of acoustic waves in solids and fluids have never been unveiled only until recently. Here, we demonstrate a metasurface waveguide for sound carrying non-zero acoustic spin with tight spin-momentum coupling, which can assist the suppression of backscattering when scatters fail to flip the acoustic spin. This is achieved by imposing a soft boundary of the π reflection phase, realized by comb-like metasurfaces. With the special-boundary-defined spin texture, the acoustic spin transports are experimentally manifested, such as the suppression of acoustic corner-scattering, the spin-selected acoustic router with spin-Hall-like effect, and the phase modulator with rotated acoustic spin.

An eigenstate formulation of the magnetotelluric impedance tensor

Geophysics ◽  
1982 ◽  
Vol 47 (8) ◽  
pp. 1204-1214 ◽  
Author(s):  
Dwight E. Eggers
Keyword(s):  
Electric Fields ◽  
Degrees Of Freedom ◽  
Homogeneous Medium ◽  
Real Space ◽  
Conventional Approach ◽  
Impedance Tensor ◽  
Electric And Magnetic Fields ◽  
Coordinate Rotation ◽  
Rotation Methods ◽  
Transverse Electromagnetic

An important step in the interpretation of magnetotelluric (MT) data is the extraction of scalar parameters from the impedance tensor Z, the transfer function which relates the observed horizontal magnetic and electric fields. The conventional approach defines parameters in terms of elements of a coordinate‐rotated tensor. The rotation angle is chosen such that Z′(θ) approximates in some sense the form for a two‐dimensional (2-D) subsurface conductivity distribution, with zero elements on the diagonal. There are two major problems with this approach. (1) Apparent resistivities, defined from the off‐diagonal elements of the rotated tensor, are independent of the trace of Z. It is problematic that apparent resistivities, the parameters for which we have physical analogs and which are most heavily used in interpretation, are insensitive to the addition of an arbitrary constant on the diagonal of Z. (2) The conventional parameter set is incomplete; there are two degrees of freedom in Z which are transparent to all parameters. Through a variation of the classical eigenstate formulation of a matrix, it is shown that in general there exist two, and only two, polarization states for which the electric and magnetic fields have the same polarization at perpendicular orientations. For each eigenstate the magnetic and electric fields are related by a scalar, the eigenvalue for that state. This scalar relationship between fields is of identical form to the solution for transverse electromagnetic (TEM) waves in a homogeneous medium and thus provides a physically more satisfactory basis for defining apparent resistivity than the conventional approach using the off‐diagonal elements of the coordinate‐rotated impedance tensor. The eigenstate and coordinate‐rotation methods yield identical results in the limited cases of 1-D and 2-D subsurface conductivity distributions. The eigenstates provide the basis for new definitions of parameters as concise, closed expressions which are complete and more amenable to interpretational insight. The polarization ellipses defined by the eigenstates provide a concise display in real space of all the information contained in the impedance tensor.

Electric fields and electromagnetic waves

1981 ◽  
Vol 19 (1) ◽  
pp. 50-51 ◽  
Author(s):  
George A. Dulk ◽  
Robert Stoller
Keyword(s):  
Electric Fields ◽  
Electromagnetic Waves
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