Controlling harmonic generation in molecules with intense laser and static magnetic fields: Orientation effects

Bandrauk, André D.; Lu, Hui

doi:10.1103/physreva.68.043408

Cited by 75 publications

(66 citation statements)

References 28 publications

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“…viously by us, 37,38 we have recently shown new methods for generating circularly polarized MHOHG, 33,40 circularly polarized attosecond pulses, 41 and attosecond magnetic field pulses. 42 We note that other previous methods to produce sources of circularly polarized HHG relied on reflector phase-shifters of linearly polarized infrared laser light with an efficiency of a few percent, thus proposing such new pulses as new tools for the investigation of ultrafast magnetization dynamics.…”

Section: 2829mentioning

confidence: 99%

“…We have also studied MHOHG, i.e., in molecular media, and have shown that single circularly polarized pulses with time modulations of the envelope f (t) gives rise to two different frequency circularly polarized pulses and always lead to recollision with the molecular plane. 37,38 This is achieved by studying the laser induced electron dynamics in a rotating frame, which separates the dynamics under the influence of a Coriolis force and the recollision potential. In both papers it is shown that the Coriolis force can be controlled by a static magnetic field of strength B (gauss).…”

Section: 2829mentioning

confidence: 99%

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Circularly Polarized Attosecond Pulses and Molecular Atto-Magnetism

Bandrauk¹,

Yuan²

2015

From Atomic to Mesoscale

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Various schemes are presented for the generation of circularly polarized molecular high-order harmonic generation (MHOHG) from molecules. In particular it is shown that combinations of counter-rotating circularly polarized pulses produce the lowest frequency Coriolis forces with the highest frequency recollisions, thus generating new harmonics which are the source of circular polarized attosecond pulses (CPAPs). These can be used to generate circularly polarized electronic currents in molecular media on attosecond time scale. Molecular attosecond currents allow then for the generation of ultrashort magnetic field pulses on the attosecond time scale, new tools for molecular atto-magnetism (MOLAM).

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Section: 2829mentioning

confidence: 99%

Section: 2829mentioning

confidence: 99%

Circularly Polarized Attosecond Pulses and Molecular Atto-Magnetism

Bandrauk¹,

Yuan²

2015

From Atomic to Mesoscale

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“…Fortunately, high-brightness circularly polarized harmonics can now be produced in the EUV and soft x-ray regions by driving HHG with bichromatic circularly polarized counter-rotating fields (13)(14)(15)(16)(17)(18)(19)(20)(21). In this scheme, a unique HHG spectrum is generated, consisting of pairs of peaks, each with opposite circular polarization.…”

Section: Introductionmentioning

confidence: 99%

Tomographic Reconstruction of Circularly Polarized High Harmonic Fields: 3D Attosecond Metrology

Chen

Tao

Hernández-García

et al. 2016

High-Brightness Sources and Light-Driven Interactions

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Bright, circularly polarized, extreme ultraviolet (EUV) and soft x-ray high-harmonic beams can now be produced using counter-rotating circularly polarized driving laser fields. Although the resulting circularly polarized harmonics consist of relatively simple pairs of peaks in the spectral domain, in the time domain, the field is predicted to emerge as a complex series of rotating linearly polarized bursts, varying rapidly in amplitude, frequency, and polarization. We extend attosecond metrology techniques to circularly polarized light by simultaneously irradiating a copper surface with circularly polarized high-harmonic and linearly polarized infrared laser fields. The resulting temporal modulation of the photoelectron spectra carries essential phase information about the EUV field. Utilizing the polarization selectivity of the solid surface and by rotating the circularly polarized EUV field in space, we fully retrieve the amplitude and phase of the circularly polarized harmonics, allowing us to reconstruct one of the most complex coherent light fields produced to date.

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“…This is because a bicircular field generates harmonics that are circularly polarized (in addition to being bright). Related schemes employ a circularly polarized field plus a static magnetic field [22,23] or crossed-beam two-color fields [24]. Bright circularly polarized harmonics open up possibilities for various applications, for example, for photoelectron circular dichroism in chiral molecules or x-ray magnetic circular dichroism spectroscopy, two important areas of chemistry and solid state physics.…”

Section: Introductionmentioning

confidence: 99%

Atomic processes in bicircular fields

Odžak

Hasović

Becker

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. We investigate laser-assisted electron-ion recombination (LAR), high-order harmonic generation (HHG) and above-threshold ionization (ATI) of argon atoms by a bicircular laser field, which consists of two coplanar counter-rotating circularly polarized fields of frequencies rω and sω. The energy of soft x rays generated in the LAR process is analyzed as a function of the incident electron angle and numerical results of direct recombination of electrons with Ar + ions are presented. We also present the results of HHG by a bicircular field and confirm the selection rules derived earlier for inert-gas atoms in a p ground state. We show that the photoelectron spectra in the ATI process, presented in the momentum plane, as well as the LAR spectra exhibit the same discrete rotational symmetry as the applied field.

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Controlling harmonic generation in molecules with intense laser and static magnetic fields: Orientation effects

Cited by 75 publications

References 28 publications

Circularly Polarized Attosecond Pulses and Molecular Atto-Magnetism

Circularly Polarized Attosecond Pulses and Molecular Atto-Magnetism

Tomographic Reconstruction of Circularly Polarized High Harmonic Fields: 3D Attosecond Metrology

Atomic processes in bicircular fields

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