I have read numerous research papers on various mechanisms of excitation of surface plasma wave. But why do we need to excite a wave? Is it necessary? Can't the wave propagate without being excited?
The excitation of surface plasma waves (SPW) by an intense short laser pulse is a useful tool to enhance the laser absorption and the electron heating in the target. In this work, the influence of the transverse laser profile and the pulse duration used to excited SPW is investigated from Fluid and 2D Particle-in-Cell simulations. We show the existence of a lobe of surface plasma wave modes. Our results highlight surface plasma waves excitation mechanism and define the laser parameters to optimise the SPW excitation and the kinetic energy of the associated electron trapped in the wave. It opens the door to monitor the spectral mode distribution and temporal shape of the excited surface waves in the high relativistic regime. The most important result of the study is that—at least in 2D—the charge and the energy of the electron bunches depend essentially on the laser energy rather than on temporal or spatial shape of the laser pulse.@
Dear Dr Moses --
1- To respond to your Q# 1 please refer to:
http://www.jetp.ac.ru/cgi-bin/dn/e_066_02_0290.pdf
2- to answer to Q #2 please have a look at :
https://www.jstor.org/stable/74692?seq=1
3- to answer Q #3
The excitation of surface plasma waves (SPW) by an intense short laser pulse is a useful tool to enhance the laser absorption and the electron heating in the target. and for more on this please see:
https://www.nature.com/articles/s41598-020-70221-9#:~:text=The%20excitation%20of%20surface%20plasma,electron%20heating%20in%20the%20target.
Regards--
Hi;
The excitation of surface plasma waves is an effective way to improve laser absorption in the target and the generation of fast electrons and ions. Potential applications in: the generation of an ultra-short pulsed X-ray light source, ultra-fast electron diffraction, tabletop electron accelerators and ultra-fast electron spectroscopies. Please check the following document.
With my best regards
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