On the possibility of the emission of attosecond pulses owing to the interaction of counterpropagating relativistically intense laser pulses with a thin layer of a diluted plasma |
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Authors: | V T Platonenko and A F Sterzhantov |
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Institution: | 1.Faculty of Physics,Moscow State University,Moscow,Russia;2.International Laser Center,Moscow State University,Moscow,Russia |
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Abstract: | A numerical experiment in which two relativistically intense laser pulses are normally incident on a layer of a diluted plasma
from two opposite sides is described. The period of Langmuir plasma oscillations is much larger than the pulse duration and
the product of this period by the speed of light is much larger than the thickness of the layer. A pulse propagating to the
right is incident on the layer earlier than the counter pulse and carries a significant fraction of electrons or all of the
electrons from the plasma. Under certain conditions, electrons form a bunch, which contains most of the electrons and has
a thickness much smaller than the wavelength of light. The counter pulse perturbs the motion of the bunch and initiates the
emission of a short few-cycle pulse, which propagates in the positive direction (to the right), significantly differs in structure
from the counter pulse, and has a duration much smaller than the field period in laser pulses. |
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Keywords: | |
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