Excitation of plasma waves by electromagnetic waves in magnetized plasmas

1993 ◽  
Vol 5 (8) ◽  
pp. 3088-3091 ◽  
Author(s):  
P. K. Shukla
Keyword(s):  
Electromagnetic Waves ◽  
Plasma Waves ◽  
Magnetized Plasmas

Harmonic Responses In 2DEG AlGaAs/GaAs HEMT Devices Due To Plasma Wave Interactions

2012 ◽  
Author(s):  
Abdul Manaf Hashim ◽  
Seiya Kasai ◽  
Hideki Hasegawa
Keyword(s):  
Plasma Wave ◽  
Electron Mobility ◽  
Electromagnetic Waves ◽  
Field Effect Transistors ◽  
High Electron Mobility Transistor ◽  
Plasma Waves ◽  
Thz Radiation ◽  
High Electron ◽  
Short Channel ◽  
High Electron Mobility

Gelombang plasma adalah ayunan kepadatan elektron dalam ruang masa, dan di dalam submikro transistor kesan medan, frekuensi plasma khas, ωp, terletak dalam julat terahertz (THz) dan tidak melibatkan peralihan kuantum. Maka, ayunan THz dapat dikesan dan/atau dihasilkan dengan menggunakan ransangan gelombang plasma. Dalam kertas kerja ini, dapat dikaji kaitan gelombang plasma antara penghantaran gelombang plasma dalam saluran pendek transistor pergerakan elektron tinggi (high–electron–mobility transistor – HEMT) dan yang terpancar dari gelombang elektromagnet. Berdasarkan ekperimen, kami telah membuktikan pengesanan radiasi terahertz (THz) oleh AlGaAs /GaAs HEMT hingga harmonik ketiga dalam suhu bilik dan hasil resonan bertepatan dengan hasil kiraan. Kata kunci: Gelombang permukaan plasma; plasma hanyut; peranti THz; GaAs; HEMT Plasma waves are oscillations of electron density in time and space, and in deep submicron field effect transistors, typical plasma frequencies, ωp, lie in the terahertz (THz) range and do not involve any quantum transitions. Hence, using plasma wave excitation for detection and/or generation of THz oscillations is a very promising approach. In this paper, the investigation of plasma wave interaction between the plasma waves propagating in a short–channel High–Electron–Mobility Transistor (HEMT) and that of the radiated electromagnetic waves was carried out. Experimentally, we have demonstrated the detection of the terahertz (THz) radiation by an AlGaAs/GaAs HEMT up to third harmonic at room temperature and their resonant responses show very good agreement with the calculated results. Key words: Surface plasma waves; drift plasma; THz device, GaAs; HEMT

scholarly journals Stability of electron wave spectra in weakly magnetized plasmas

2017 ◽  
Vol 83 (6) ◽  
Author(s):  
M. Kono ◽  
H. L. Pécseli
Keyword(s):  
Continuous Wave ◽  
Wave Spectrum ◽  
Spectral Width ◽  
Plasma Waves ◽  
Electron Plasma ◽  
Analytical Models ◽  
Magnetized Plasmas ◽  
Wave Spectra ◽  
Weakly Nonlinear ◽  
Modulational Instabilities

Analytical models for nonlinear electron plasma waves in weakly magnetized plasmas are developed for single as well as multi-mode conditions, with continuous wave spectra being a limiting case. The conditions for wave decay as well as modulational instabilities are analysed. Our results demonstrate that slow or nearly stationary plasma density variations can be found for weakly magnetized plasmas even for weakly nonlinear electron plasma waves without involving cavitation of large amplitude plasma waves. A reduction of the growth rates for decay as well as modulational instabilities are found when the spectral width of the wave spectrum is increased. Some of our results are relevant for the interpretation of the nonlinearly enhanced ion acoustic lines often observed in non-equilibrium ionospheres.

scholarly journals Whistler waves observed by Solar Orbiter during its first orbit

2021 ◽  
Author(s):  
Matthieu Kretschmar ◽  
Thomas Chust ◽  
Daniel Graham ◽  
Volodya Krasnosekskikh ◽  
Lucas Colomban ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Electromagnetic Waves ◽  
Heliocentric Distance ◽  
Plasma Waves ◽  
Distribution Functions ◽  
The Sun ◽  
Whistler Waves ◽  
Velocity Distribution Functions ◽  
The Waves

<p>Plasma waves can play an important role in the evolution of the solar wind and the particle velocity distribution functions in particular. We analyzed the electromagnetic waves observed above a few Hz by the Radio Plasma Waves (RPW) instrument suite onboard Solar Orbiter, during its first orbit, which covered a distance from the Sun between 1 AU and 0.5 AU.  We identified the majority of the detected waves as whistler waves with frequency around  0.1 f_ce and right handed circular polarisation. We found these waves to be mostly aligned or anti aligned with the ambient magnetic field, and rarely oblique. We also present and discuss their direction of propagation and the variation of the waves' properties with heliocentric distance.</p>

Interaction between electromagnetic waves and plasma waves in motional plasma

2009 ◽  
Vol 16 (6) ◽  
pp. 062107 ◽  
Author(s):  
S. Y. Chen ◽  
M. Gao ◽  
C. J. Tang ◽  
X. D. Peng
Keyword(s):  
Electromagnetic Waves ◽  
Plasma Waves
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