Even-order harmonic generation from nonlinear Thomson backscatter in a tightly focused Gaussian laser pulse

Hong, Xue-Ren; Li, Yanan; Wei, Dou; Tang, Rong-An; Sun, Jianan; Duan, Wen‐Shan

doi:10.1063/5.0077486

Cited by 7 publications

(3 citation statements)

References 54 publications

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“…Obviously the maximum photon brightness of the high-order harmonics is larger than that of the low order harmonics in Ref. [44].…”

Section: The Optimum Observation Directionmentioning

confidence: 80%

Angular distributions of nonlinear Thomson scattering in combined fields with a general elliptical polarization laser and a background magnetic field

Xiao¹,

Zhang²,

Sang³

et al. 2022

Preprint

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Nonlinear Thomson scattering of an electron motion in a combined fields is investigated. The fields are constituted by an intense elliptically polarized laser field and a strong background magnetic field. It is found that the angular distributions of scattering spectra with respect to the azimuthal angle exhibits the symmetry for the laser intensity, the magnetic resonance parameter, the initial axial momentum of electron as well as the order of harmonics in emission spectra. Meanwhile the distribution of polar angle approaches the direction of laser propagation more and more with parameters increase. The optimal angle for maximum radiated power per unit of solid, the corresponding photon number and its brightness can be obtained, which implies that the high quality XUV or/and X-ray light can be generated by the studied scheme when the suitable parameters are choosen.

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“…Obviously the maximum photon brightness of the high-order harmonics is larger than that of the low order harmonics in Ref. [44].…”

Section: The Optimum Observation Directionmentioning

confidence: 80%

Angular distributions of nonlinear Thomson scattering in combined fields with a general elliptical polarization laser and a background magnetic field

Xiao¹,

Zhang²,

Sang³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…6,11 . Hong et al 12 observed that increasing the laser intensity of a tightly focused Gaussian laser can break the symmetry of electron trajectories and enhance the peak. The effect of laser intensity on the emission spectrum was studied by Zhuang et al 13 , who found that the spectral bandwidth of the emitted light becomes wider in a high-intensity laser field.…”

Section: Introductionmentioning

confidence: 99%

Laser intensity affects the electron's optimal position and the spatial radiation characteristics in linearly polarized tightly focused laser field

Qiu,

Zhang,

Tian

2023

Eighteenth National Conference on Laser Technology and Optoelectronics

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Using computer numerical simulation technology, we discuss in detail the influence of linearly polarized tightly focused laser intensity on the maximum radiation power and optimal position of electrons, and further study the dynamics and spatial radiation characteristics of electrons at the optimal position corresponding to different laser intensities.Our results demonstrate that the optimal position and maximum radiation power of the electron exhibit linear and exponential dependencies, respectively, on the laser amplitude.The initially stationary electron at the optimal position undergoes oscillatory motion,and then moves in a straight line after interacting with the laser, with an asymmetric trajectory. As the laser intensity increases, The azimuth angle of the maximum power radiation power remains 0°, while the polar angle decreases from 41° to 25°, indicating that it approaches the z-axis. The time when the maximum radiation power occurs is approximately 50.7 fs. Addictionally, We further discuss the evolution characteristics of the time spectra in the direction of maximum power radiation.

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“…(14) Hong et al observed that increasing the laser intensity of a tightly focused Gaussian laser can break the symmetry of electron trajectories and enhance the peak. (15) The effect of laser intensity on the emission spectrum was studied by Zhuang et al, who found that the spectral bandwidth of the emitted light becomes larger in a high-intensity laser field. (16) In addition, Yan et al studied the effect of the initial position of the high-energy electron on its spatial radiation properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Intensity on an Electron’s Optimal Position and Spatial Radiation Characteristics in a Linearly Polarized Tightly Focused Laser Field

Qiu¹,

Tian²,

Chen³

2023

Sensors and Materials

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X-rays are widely used in the field of optical imaging. A novel type of X-ray source is the relativistic nonlinear Thomson scattering (RNTS). Within the framework of RNTS, we investigated in detail the effects of different intensities of linearly polarized tightly focused lasers on the maximum radiation power, optimal position of an electron (initial position of the electron that yields the maximum radiation power in the entire space), as well as the motion and spatial radiation features of the electron at the optimal position. Our results reveal, for the first time, that the optimal position and maximum radiation power of the electron exhibit significant linear and exponential dependences, respectively, on the laser amplitude. After interacting with the laser, the initially stationary electron at the optimal position first undergoes an oscillatory motion and then moves linearly. The entire trajectory of the electron is asymmetric. As the laser intensity increases, the spatial and angular distributions of the radiation become smaller, and the collimation of radiation increases. In the direction of maximum power radiation, the azimuth angle φ remains at 0°, whereas the corresponding polar angle θ decreases from 41° to 20°, indicating that the spatial radiation approaches the z-axis. The time when the maximum radiation power is obtained is approximately 50.7 fs. Additionally, the asymmetry and micro-double-peak structure of the temporal spectra, as well as the modulation characteristics of the frequency spectra, were further investigated in the direction of the maximum power radiation. These findings will assist researchers in achieving high-power and ultrashort X-rays in experiments, thereby increasing the resolution and imaging speed of optical imaging.

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Even-order harmonic generation from nonlinear Thomson backscatter in a tightly focused Gaussian laser pulse

Cited by 7 publications

References 54 publications

Angular distributions of nonlinear Thomson scattering in combined fields with a general elliptical polarization laser and a background magnetic field

Angular distributions of nonlinear Thomson scattering in combined fields with a general elliptical polarization laser and a background magnetic field

Laser intensity affects the electron's optimal position and the spatial radiation characteristics in linearly polarized tightly focused laser field

Effect of Laser Intensity on an Electron’s Optimal Position and Spatial Radiation Characteristics in a Linearly Polarized Tightly Focused Laser Field

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