Density modulation produced by ultrashort laser pulses and the phase reflection induced in underdense plasmas
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Published:2005
Issue:9
Volume:54
Page:4217
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ISSN:1000-3290
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Container-title:Acta Physica Sinica
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language:
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Short-container-title:Acta Phys. Sin.
Author:
Zhang Qiu-Ju ,Sheng Zheng-Ming ,Cang Yu ,Zhang Jie ,
Abstract
It is shown theoretically and by particle-in-cell simulations that the interferi ng fields of the incident and reflected laser pulses can produce deep plasma den sity modulations in underdense pre-plasmas.This occurs within a few tens of lase r cycles if the incident laser pulse is at moderate intensities such as 10 15W/cm2Such density modulations can serve as a Bragg reflector ,which results in phase reflection from underdense plasmas.Because the deep dens ity modulations are just a period of half a wavelength in the plasma,the reflec ted wave reaches the maximum by resonance with a reflectivity up to near 100%.T he phase reflection can also be observed from the plasma with a linear density p rofile,which can significantly reduce the laser absorption by fusion targets.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Cited by
1 articles.
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