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Resonant x-ray second-harmonic generation in atomic gases
North China Elect Power Univ, Dept Math & Phys, Beijing 102206, Peoples R China.;Shandong Normal Univ, Collaborat Innovat Ctr Light Manipulat & Applicat, Jinan 250358, Shandong, Peoples R China..ORCID iD: 0000-0002-4341-4823
Synchrotron SOLEIL, Boite Postale 48, F-91192 Gif Sur Yvette, France.;Horia Hulubei Natl Inst Phys & Nucl Engn, ELI NP, 30 Reactorului St, RO-077125 Magurele, Judet Ilfov, Romania.;Univ Paris Saclay, CEA Saclay, CNRS, LIDYL,CEA, F-91191 Gif Sur Yvette, France..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Theoretical Chemistry and Biology.ORCID iD: 0000-0002-1763-9383
Siberian Fed Univ, Krasnoyarsk 660041, Russia.;Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia..ORCID iD: 0000-0003-1366-1986
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2019 (English)In: Physical Review A: covering atomic, molecular, and optical physics and quantum information, ISSN 2469-9926, E-ISSN 2469-9934, Vol. 100, no 6, article id 063403Article in journal (Refereed) Published
Abstract [en]

We explore the x-ray second-harmonic generation process induced by resonant two-photon absorption in systems with inversion symmetry. We show that this process becomes allowed in the x-ray region due to nondipole contributions. It is found that, although a plane-wave pump field generates only a longitudinal second-harmonic field, a Gaussian pump beam creates also a radially polarized transverse second-harmonic field which is stronger than the longitudinal one. Contrary to the longitudinal component, the transverse second-harmonic field with zero intensity on the axis of the pump beam can run in free space. Our theory is applied to Ar and Ne atomic vapors and predicts an energy conversion efficiency of x-ray second-harmonic generation of 3.2 x 10(-11) and 1.3 x 10(-12), respectively.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 100, no 6, article id 063403
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Physical Sciences
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URN: urn:nbn:se:kth:diva-266274DOI: 10.1103/PhysRevA.100.063403ISI: 000499966200011Scopus ID: 2-s2.0-85077089522OAI: oai:DiVA.org:kth-266274DiVA, id: diva2:1383630
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QC 20200108

Available from: 2020-01-08 Created: 2020-01-08 Last updated: 2020-01-08Bibliographically approved

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Ågren, HansGel'mukhanov, Faris

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