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Título
Bright, single helicity, high harmonics driven by mid-infrared bicircular laser fields
Autor(es)
Materia
Attosecond pulses
Beam shaping
High harmonic generation
Phase matching
Photon counting
Soft x rays
Clasificación UNESCO
2209 Óptica
Fecha de publicación
2021-11
Citación
Dorney, K.M., Tingting, F., Nguyen, Q.L., Ellis, J.L., Hickstein, D.D., Brooks, N., Zusin, D., Gentry, C., Hernández-García, C., Kapteyn, H.C. and Murnane, M.M. (2021). Bright, single helicity, high harmonics driven by mid-infrared bicircular laser fields. Opt. Express 29, 38119-38128
Resumen
[EN]High-harmonic generation (HHG) is a unique tabletop light source with femtosecond-to-attosecond pulse duration and tailorable polarization and beam shape. Here, we use counter-rotating femtosecond laser pulses of 0.8 µm and 2.0 μm to extend the photon energy range of circularly polarized high-harmonics and also generate single-helicity HHG spectra. By driving HHG in helium, we produce circularly polarized soft x-ray harmonics beyond 170 eV—the highest photon energy of circularly polarized HHG achieved to date. In an Ar medium, dense spectra at photon energies well beyond the Cooper minimum are generated, with regions composed of a single helicity—consistent with the generation of a train of circularly polarized attosecond pulses. Finally, we show theoretically that circularly polarized HHG photon energies can extend beyond the carbon K edge, extending the range of molecular and materials systems that can be accessed using dynamic HHG chiral spectro-microscopies
URI
DOI
10.1364/OE.440813
Versión del editor
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- ALF. Artículos [314]