Polarization shaping of high-order harmonics in laser-aligned molecules.

Polarization shaping of high-order harmonics in laser-aligned molecules.
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DOI:
10.1038/srep39295
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发表时间:
2016-12-20
期刊:
影响因子:
4.6
通讯作者:
Faucher O
Faucher O
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Skantzakis E;Chatziathanasiou S;Carpeggiani PA;Sansone G;Nayak A;Gray D;Tzallas P;Charalambidis D;Hertz E;Faucher O

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The present work reports on the generation of short-pulse coherent extreme ultraviolet radiation of controlled polarization. The proposed strategy is based on high-order harmonics generated in pre-aligned molecules. Field-free molecular alignment produced by a short linearly-polarized infrared laser pulse is used to break the isotropy of a gas medium. Driving the aligned molecules by a circularly-polarized infrared pulse allows to transfer the anisotropy of the medium to the polarization of the generated harmonic light. The ellipticity of the latter is controlled by adjusting the angular distribution of the molecules at the time they interact with the driving pulse. Extreme ultraviolet radiation produced with high degree of ellipticity (close to circular) is demonstrated.
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