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초강력 레이저 과학 연구단
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Attosecond pulses generated by the lighthouse effect in Ar gas

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Title
Attosecond pulses generated by the lighthouse effect in Ar gas
Author(s)
Tosa, V; Lee, JS; Hyung Taek Kim; Chang Hee Nam
Publication Date
2015-05
Journal
PHYSICAL REVIEW A, v.91, no.5, pp.051801 -
Publisher
AMER PHYSICAL SOC
Abstract
We numerically investigate harmonic generation in Ar gas under high ionization conditions and demonstrate that a lighthouse effect is present. We examine the structure of the driving field during propagation in temporal, spectral, and spatial domains, and conclude that the complete depletion of neutral Ar on axis gives rise to additional wavelets at off-axis regions. We show that these wavelets propagate with increasing divergence as the radial distances from the axis increase, generating the rotation of the wave front, thus fulfilling a necessary condition for the lighthouse effect. We obtain attosecond bursts of light emitted with different divergences in successive optical half-cycles so that in the far field these bursts arrive at different distances from the beam axis
URI
http://pr.ibs.re.kr/handle/8788114/2026
DOI
10.1103/PhysRevA.91.051801
ISSN
2469-9926
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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(Attosecond)PhysRevA.91.051801_HT Kim_20247.pdfDownload

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