Terahertz plasma-wave excitation in 80-nm gate-length GaAs MESFET by photomixing long-wavelength CW laser sources

2002 ◽  
Author(s):  
T. Otsuji ◽  
Y. Kanamaru ◽  
H. Kitamura ◽  
S. Nakae
Keyword(s):  
Plasma Wave ◽  
Gate Length ◽  
Wave Excitation ◽  
Long Wavelength ◽  
Gaas Mesfet ◽  
Cw Laser ◽  
Laser Sources

Effect of relativistic self-focusing on plasma wave excitation by a hollow Gaussian beam

2011 ◽  
Vol 77 (6) ◽  
pp. 777-784 ◽  
Author(s):  
RUCHIKA GUPTA ◽  
M. RAFAT ◽  
R. P. SHARMA
Keyword(s):  
Laser Beam ◽  
Gaussian Beam ◽  
Plasma Wave ◽  
Radial Distance ◽  
Laser Frequency ◽  
Pump Laser ◽  
Wave Excitation ◽  
Paraxial Ray Approximation ◽  
Self Focusing ◽  
Paraxial Ray

AbstractA paraxial-like approach has been invoked to understand the nature of propagation of a hollow Gaussian beam (HGB) propagating in plasma under the influence of relativistic non-linearity. In this approach, the parameters are expanded in terms of the radial distance from the maximum of irradiance rather than that from the axis. This paper investigates the excitation of plasma wave in a hot collision less plasma by HGB. On account of the × force, a plasma wave at 2ω0 (here, ω0 is the pump laser frequency) is generated. The solution of the HGB has been obtained within the paraxial ray approximation. Filamentary structures of the laser beam are observed due to relativistic non-linearity.

scholarly journals Beat-wave excitation of plasma wave and observation of accelerated electrons

1992 ◽  
Vol 68 (1) ◽  
pp. 48-51 ◽  
Author(s):  
Y. Kitagawa ◽  
T. Matsumoto ◽  
T. Minamihata ◽  
K. Sawai ◽  
K. Matsuo ◽  
...  
Keyword(s):  
Plasma Wave ◽  
Wave Excitation ◽  
Accelerated Electrons

scholarly journals Photocontrolled Terahertz Amplified Modulator via Plasma Wave Excitation in ORTD-Gated HEMTs

2017 ◽  
Vol 9 (5) ◽  
pp. 1-8 ◽  
Author(s):  
Changju Zhu ◽  
Luhong Mao ◽  
Fan Zhao ◽  
Xurui Mao ◽  
Weilian Guo
Keyword(s):  
Plasma Wave ◽  
Wave Excitation

Photoacoustic Raman spectroscopy (PARS) using cw laser sources

1979 ◽  
Vol 34 (2) ◽  
pp. 144-146 ◽  
Author(s):  
Joseph J. Barrett ◽  
Michael J. Berry
Keyword(s):  
Raman Spectroscopy ◽  
Cw Laser ◽  
Laser Sources
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