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Elliptically Polarized High-harmonic Radiation for Production of Isolated Attosecond Pulses

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Journal Sci Rep
Specialty Science
Date 2021 May 6
PMID 33953228
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Abstract

Circularly polarized attosecond pulses are powerful tool to study chiral light-matter interaction via chiral electron dynamics. However, access to isolated circularly polarized attosecond pulses enabling straightforward interpretation of measurements, still remains a challenge. In this work, we experimentally demonstrate the generation of highly elliptically polarized high-harmonics in a two-color, bi-circular, collinear laser field. The intensity and shape of the combined few-cycle driving radiation is optimized to produce a broadband continuum with enhanced spectral chirality in the range of 15-55 eV supporting the generation of isolated attosecond pulses with duration down to 150 as. We apply spectrally resolved polarimetry to determine the full Stokes vector of different spectral components of the continuum, yielding a homogenous helicity distribution with ellipticity in the range of 0.8-0.95 and a negligible unpolarized content.

References
1.
von Korff Schmising C, Weder D, Noll T, Pfau B, Hennecke M, Struber C . Generating circularly polarized radiation in the extreme ultraviolet spectral range at the free-electron laser FLASH. Rev Sci Instrum. 2017; 88(5):053903. DOI: 10.1063/1.4983056. View

2.
Veyrinas K, Gruson V, Weber S, Barreau L, Ruchon T, Hergott J . Molecular frame photoemission by a comb of elliptical high-order harmonics: a sensitive probe of both photodynamics and harmonic complete polarization state. Faraday Discuss. 2016; 194:161-183. DOI: 10.1039/c6fd00137h. View

3.
Corkum . Plasma perspective on strong field multiphoton ionization. Phys Rev Lett. 1993; 71(13):1994-1997. DOI: 10.1103/PhysRevLett.71.1994. View

4.
Suzuki M, Inubushi Y, Yabashi M, Ishikawa T . Polarization control of an X-ray free-electron laser with a diamond phase retarder. J Synchrotron Radiat. 2014; 21(Pt 3):466-72. DOI: 10.1107/S1600577514004780. View

5.
McFarland B, Farrell J, Bucksbaum P, Guhr M . High harmonic generation from multiple orbitals in N2. Science. 2008; 322(5905):1232-5. DOI: 10.1126/science.1162780. View