Analysis of THz generation through the asymmetry of photoelectron angular distributions

Zhou, Zhenhua; Wang, Xu; Lin, C. D.

doi:10.1103/physreva.95.033418

Cited by 7 publications

(3 citation statements)

References 30 publications

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“…The QTM predicted S THz (τ ) is consistent with commonly used theoretical models including the continuum-continuum transition in SFA and PC model [16]. And the w(p) also can be cross validated with numerical solving time-dependent Schrödinger equation [18]. The QTM would provide more potential theoretical treatment for the TWG.…”

supporting

confidence: 71%

Terahertz Emisssion from Quantum Interference of Electron Trajectories

Zhang,

Yan

et al. 2020

Preprint

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supporting

confidence: 71%

Terahertz Emisssion from Quantum Interference of Electron Trajectories

Zhang,

Yan

et al. 2020

Preprint

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“…Recently, the THz energy of 31 μJ with cylindrical lens focusing was reached [29]. The mechanism of terahertz radiation in a two-color field was suggested in [30] and later studied in several papers; see, in particular, [31][32][33][34][35][36][37] and references therein.…”

Section: Introductionmentioning

confidence: 99%

Multiphoton ionization of atoms in two-color laser field and coherent polarization control of terahertz waves

Rylyuk¹

2018

Laser Phys.

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Within the framework of the Keldysh theory, the multiphoton ionization of atoms subjected to a perturbation by a high intensity two-color laser radiation field of an arbitrary polarization is considered. The dependence of the net photoelectron current, generated due to the interaction of an intense elliptically polarized two-color laser field with an atom, on the ratio of the second and fundamental harmonic amplitudes, their relative phase, and an angle between harmonics is found. The parameters maximizing the net photoelectron current are specified. Properties of polarization and spectral intensity of terahertz radiation and also possibility of the coherent control of terahertz waves polarization through the relative phase between harmonics in a two-color scheme are investigated. Using the 'imaginary-time' method, extremal subbarrier trajectories of the photoelectron moving in an elliptically polarized two-color laser field and the Coulomb correction to the total ionization rate are derived and discussed. The asymptotic expressions for the total ionization rate and the net photoelectron current obtained in the paper for the qualitative explanation of experiments on the generation of terahertz radiation in gases can be used.

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“…The trajectory predicted S THz (τ ) is consistent with the experimental results, validating the successes of the trajectory method. And the w( p) can also be cross-validated with numerical solving timedependent Schrödinger equation [25]. However, the trajectory method gives a more straightforward insight into the microscopic mechanism of TWG, and directly connects the TWG and PEMDs [17][18][19][20].…”

Section: Methodsmentioning

confidence: 99%

Electron trajectory backanalysis for spectral profile in two-color terahertz generation

Zhang¹,

Zhang²,

Yan³

et al. 2021

J. Phys. B: At. Mol. Opt. Phys.

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The gas-phase medium ionized by two-color femtosecond field produces supercontinuum radiation ranging from the terahertz to midinfrared band. Under the strong-field approximation, the electron trajectory backanalysis is exploited to interpret the spectral profile of terahertz radiation. Meanwhile, the electron trajectory method can correlate terahertz spectral profiles and photoelectron momentum distributions (PEMDs). The coherent superposition of electron trajectories released from the consecutive cycles is found to induce the high-frequency cutoff and sharpen the spectral bandwidth of supercontinuum radiation, tightly coinciding with the intercycle interference fringes in PEMDs. The trajectory analysis exhibits that single electron interference plays an important role in the terahertz generation process. Our method provides an intuitive interpretation in terms of electron trajectory perspective and sheds light on the microscopic mechanisms of terahertz generation.

show abstract

Analysis of THz generation through the asymmetry of photoelectron angular distributions

Cited by 7 publications

References 30 publications

Terahertz Emisssion from Quantum Interference of Electron Trajectories

Terahertz Emisssion from Quantum Interference of Electron Trajectories

Multiphoton ionization of atoms in two-color laser field and coherent polarization control of terahertz waves

Electron trajectory backanalysis for spectral profile in two-color terahertz generation

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