Plasmon resonance coupling in cold overdense dissipative plasma

Abstract

This study introduce a new frequency parameter called s fcwt , which can be used to estimate earthquake magnitude on the basis of the first few seconds of P-waves, using the waveforms of earthquakes occurring in Japan. This new parameter is introduced using continuous wavelet transform as a tool for extracting the frequency contents carried by the first few seconds of P-wave. The empirical relationship between the logarithm of s fcwt within the initial 4 s of a waveform and magnitude was obtained. To evaluate the precision of s fcwt , we also calculated parameters s max p and s c . The average absolute values of observed and estimated magnitude differences (jM est À M obs j) were 0.43, 0.49, and 0.66 units of magnitude, as determined using s max p , s c , and s fcwt , respectively. For earthquakes with magnitudes greater than 6, these values were 0.34, 0.56, and 0.44 units of magnitude, as derived using s max p , s c , and s fcwt , respectively. The s fcwt parameter exhibited more precision in determining the magnitude of moderate-and small-scale earthquakes than did the s c -based approach. For a general range of magnitudes, however, the s max p -based method showed more acceptable precision than did the other two parameters.

Faraday Rotation of Overdense Magnetized Plasma

“…The field components in the plasma region ( for |z| < h 1 ) are given by Eqs. (16)(17)(18)(19). The field components in the dielectric regions can be found by setting ε 1 = ε 3 = ε d and ε 2 = 0 in the equations (13)- (15), that leads to:…”

“…Over-dense plasma has negative permittivity in some frequency regions (ε = 1 − ω p ω for ω < ω p ) and behaves as a plasmonic structure. Further, an over-dense plasma layer can become totally transparent owing to the excitation of coupled plasmons, [16][17][18].…”

“…The main procedure of this anomalous wave transmission involves the excitation of surface modes or plasmon polariton on the plasma surface, [16][17][18]. An incident propagating electromagnetic wave cannot excite plasmon polariton.…”

Transmission Matrix and Faraday Rotation in a Structure Composed of Over-Dense Magnetized Plasma, Dielectric, and Prism Layers

“…In the frequency region ω < ω p , an over-dense plasma is completely opaque to electromagnetic waves. However, if surface plasmons are excited then electromagnetic waves can pass over-dense plasma [6][7][8]. The excitation of surface plasmons on the surface of the plasma only occurs in the presence of evanescent waves.…”

“…The dielectric layer damped waves on both sides of the plasma which led to the excitation of the coupled plasmons on both sides of the over-dense plasma layer. The created coupled plasmons can then transfer the incident electromagnetic energy [6,8,12]. In our previous study, we used two dielectric layers, one on each side of a plasma, to produce evanescent waves [11].…”