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| 001 | 891900 | ||
| 005 | 20260127150455.0 | ||
| 024 | 7 | _ | |2 doi |a 10.1088/1361-6587/abd9e1 |
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| 024 | 7 | _ | |2 ISSN |a 0741-3335 |
| 024 | 7 | _ | |2 ISSN |a 1361-6587 |
| 024 | 7 | _ | |2 ISSN |a 1879-2979 |
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| 100 | 1 | _ | |0 P:(DE-Juel1)171323 |a Chitgar, Z. M. |b 0 |e Corresponding author |
| 245 | _ | _ | |a Theory of circularly polarized harmonic generation using bi-colour lasers in underdense plasmas |
| 260 | _ | _ | |a Bristol |b IOP Publ. |c 2021 |
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| 520 | _ | _ | |a Circularly polarized (CP) extreme ultraviolet- and x-ray radiation is an essential tool for analyzing the magnetic properties of materials. Elliptically polarized high harmonic generation (HHG) has been demonstrated by focusing bi-chromatic (800 + 400 nm wavelengths), counter-rotating CP laser pulses into gas targets (Fleischer et al 2014 Nat. Photonics 8 543). More recent theoretical studies indicate that a bi-circular laser driver can also work in both under- and overdense plasmas with analogous selection rules to those in gases: for example, every third harmonic is suppressed and adjacent harmonics have opposite helicity for counter-polarized CP ω0 and 2ω0 pumps. In this work, an analytical theory of bi-circular HHG from underdense plasmas is formulated which provides quantitative predictions of harmonic efficiency scaling, selectivity and helicity for both co- and counter-polarized drivers of arbitrary frequency ratio. This is compared to a fully non-linear, one-dimensional fluid model and particle-in-cell simulations, showing good agreement with both. |
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| 700 | 1 | _ | |0 P:(DE-Juel1)130495 |a Adam, R. |b 1 |
| 700 | 1 | _ | |0 P:(DE-Juel1)173666 |a Greb, C. |b 2 |
| 700 | 1 | _ | |0 P:(DE-Juel1)131234 |a Lehrach, A. |b 3 |
| 700 | 1 | _ | |0 P:(DE-Juel1)131108 |a Büscher, M. |b 4 |
| 700 | 1 | _ | |0 P:(DE-Juel1)132115 |a Gibbon, P. |b 5 |
| 773 | _ | _ | |0 PERI:(DE-600)1473144-7 |a 10.1088/1361-6587/abd9e1 |g Vol. 63, no. 3, p. 035023 - |n 3 |p 035023 - |t Plasma physics and controlled fusion |v 63 |x 1361-6587 |y 2021 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/891900/files/Chitgar_2021_Plasma_Phys._Control._Fusion_63_035023.pdf |y OpenAccess |
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