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Sargis Ter-Avetisyan
초강력 레이저과학 연구단
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Surface modulation and back reflection from foil targets irradiated by a Petawatt femtosecond laser pulse at oblique incidence

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Title
Surface modulation and back reflection from foil targets irradiated by a Petawatt femtosecond laser pulse at oblique incidence
Author(s)
S. Ter-Avetisyan; Andreev A.; Platonov K.; Sung J.H.; Lee S.K.; H.W. Lee; J.Y. Yoo; P.K. Singh; Ahmed H.; Scullion C.; K.F. Kakolee; Tae Won Jeong; Hadjisolomou P.; Borghesi M.
Publication Date
2016-11
Journal
OPTICS EXPRESS, v.24, no.24, pp.28104 - 28112
Publisher
OPTICAL SOC AMER
Abstract
A significant level of back reflected laser energy was measured during the interaction of ultra-short, high contrast PW laser pulses with solid targets at 30° incidence. 2D PIC simulations carried out for the experimental conditions show that at the laser-target interface a dynamic regular structure is generated during the interaction, which acts as a grating (quasi-grating) and reflects back a significant amount of incident laser energy. With increasing laser intensity above 1018 W/cm2 the back reflected fraction increases due to the growth of the surface modulation to larger amplitudes. Above 1020 W/cm2 this increase results in the partial destruction of the quasi-grating structure and, hence, in the saturation of the back reflection efficiency. The PIC simulation results are in good agreement with the experimental findings, and, additionally, demonstrate that in presence of a small amount of pre-plasma this regular structure will be smeared out and the back reflection reduced. © 2016 Optical Society of America
URI
https://pr.ibs.re.kr/handle/8788114/3102
ISSN
1094-4087
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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