Journal Article

FZJ-2021-01812

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Theory of circularly polarized harmonic generation using bi-colour lasers in underdense plasmas

Chitgar, Z. M. (Corresponding author)FZJ* ; Adam, R.FZJ* ; Greb, C.FZJ* ; Lehrach, A.FZJ* ; Büscher, M.FZJ* ; Gibbon, P.FZJ*

2021
IOP Publ. Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/27641  doi:10.1088/1361-6587/abd9e1

Abstract: 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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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)
2. Elektronische Eigenschaften (PGI-6)
3. Kernphysikalische Großgeräte (IKP-4)
4. JARA - HPC (JARA-HPC)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)
2. Kinetic Plasma Simulation with Highly Scalable Particle Codes (jzam04_20190501) (jzam04_20190501)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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