Anomalous resonance-enhanced harmonic ellipticity in an elliptically polarized laser field

Huo, Xiao-Xin; Wang, Shuang; Sun, Lin; Xing, Yun-He; Zhang, Jun; Liu, Xue‐Shen

doi:10.1103/physreva.106.023102

Cited by 7 publications

(2 citation statements)

References 49 publications

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“…In addition, there are several theoretical studies in which the HHG efficiency was calculated using the recombination cross-section. The theoretical models other than the four-step model were introduced in [27][28][29][30][31][32], though the list of the theoretical studies of RH effect in plasma is much larger. A sequence of experiments on the pronounced enhancement of single harmonics in laser-driven plasmas has shown that this effect is attributed to the dynamical shift of ionic resonances close to specific harmonics.…”

Section: Discussionmentioning

confidence: 99%

High-Order Harmonics Generation in Selenium-Containing Plasmas

Ganeev

2023

Photonics

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The studies of the high-order harmonics generated in Se-containing plasmas are reported. The ablation of selenium in a vacuum allowed for the formation of a plasma demonstrating high-order harmonics generation and resonance enhancement of the harmonic at the shortest wavelength reported so far (λ ≈ 22.9 nm, Eph ≈ 54.14 eV). This harmonic corresponds to the 35th order of the 800-nm-class lasers. The influence of the presence of selenium in the molecular state (ZnSe and HgSe) on the suppression of the resonance effect during harmonics generation in plasma is studied. The enhanced 35th harmonic was analyzed by different methods of plasma formation using nanosecond, picosecond, and femtosecond pulses. The enhancement factor of the resonance-enhanced harmonic was measured to be 32× compared with the neighboring lower-order harmonics in the case of the picosecond-pulses-induced Se plasma. The role of the strong ionic transition of Se in the region of 22.7 nm in the observation of the resonance-induced enhancement of a single harmonic is discussed.

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Section: Discussionmentioning

confidence: 99%

High-Order Harmonics Generation in Selenium-Containing Plasmas

Ganeev

2023

Photonics

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“…[1][2][3][4] Linear APs are restricted in probing chiral-sensitive light-matter interactions, [5,6] so it is desirable to generate APs with tunable polarization. Considerable efforts have been devoted to polarization control of harmonics in elliptically polarized (EP) fields, [7,8] (nearly) orthogonally two-color polarized (OTC) fields, [9][10][11] and co-rotating bicircular fields. [12] Recently, the bichromatic counter-rotating circularly polarized (BCCP) field with frequencies (ω, 2ω) has been proven to be an efficient laser scheme for generating the harmonics with large ellipticity.…”

Section: Introductionmentioning

confidence: 99%

Generating attosecond pulses with controllable polarization from cyclic H32+ molecules by bichromatic circular fields

Zhang 张,

Yan 闫

et al. 2024

Chinese Phys. B

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We investigate the polarization properties of harmonics from the cyclic ${\text{H}}_3^{2+}$ molecular ions in tailored bichromatic counter-rotating circularly polarized (BCCP) fields by solving the time-dependent Schrödinger equation. The allowed harmonics and their helicities are associated with the symmetry compatibility of the field-target systems, and large intensity difference between adjacent harmonics with opposite helicities appears in a wide spectral range when the BCCP field is at certain rotation angles. We try to explain the intensity difference by using a recombination model based on quantum-orbit theory and by analyzing the ionization pathways. Moreover, to synthesize attosecond pulse trains with tunable polarization, the intensity difference is manipulated by introducing a seed XUV field, and by changing the relative amplitude ratio as well as the helicity of BCCP fields.

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Investigate the electron dynamics of harmonic minimum from the bichromatic periodic potential

Fan

Zhang

et al. 2023

Chemical Physics Letters

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Anomalous resonance-enhanced harmonic ellipticity in an elliptically polarized laser field

Cited by 7 publications

References 49 publications

High-Order Harmonics Generation in Selenium-Containing Plasmas

High-Order Harmonics Generation in Selenium-Containing Plasmas

Generating attosecond pulses with controllable polarization from cyclic H32+ molecules by bichromatic circular fields

Investigate the electron dynamics of harmonic minimum from the bichromatic periodic potential

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