Enhancement of brightness of high-order harmonics with elliptical polarization from near-critical density plasmas irradiated by an ultraintense laser pulse

2020 ◽  
Vol 27 (8) ◽  
pp. 083101
Author(s):  
Yan Jiang ◽  
Qing Wang ◽  
Lihua Cao ◽  
Zhanjun Liu ◽  
Chunyang Zheng ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Critical Density ◽  
High Order ◽  
Elliptical Polarization

scholarly journals Reconstruction algorithm for tunneling ionization with a perturbation for the time-domain observation of an electric-field

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wosik Cho ◽  
Jeong-uk Shin ◽  
Kyung Taec Kim
Keyword(s):  
Laser Pulse ◽  
Electric Field ◽  
Time Domain ◽  
Reconstruction Algorithm ◽  
High Order ◽  
Reconstruction Process ◽  
Tunneling Ionization ◽  
Order Contribution ◽  
High Order Contribution ◽  
The Time Domain

AbstractWe present a reconstruction algorithm developed for the temporal characterization method called tunneling ionization with a perturbation for the time-domain observation of an electric field (TIPTOE). The reconstruction algorithm considers the high-order contribution of an additional laser pulse to ionization, enabling the use of an intense additional laser pulse. Therefore, the signal-to-noise ratio of the TIPTOE measurement is improved by at least one order of magnitude compared to the first-order approximation. In addition, the high-order contribution provides additional information regarding the pulse envelope. The reconstruction algorithm was tested with ionization yields obtained by solving the time-dependent Schrödinger equation. The optimal conditions for accurate reconstruction were analyzed. The reconstruction algorithm was also tested using experimental data obtained using few-cycle laser pulses. The reconstructed pulses obtained under different dispersion conditions exhibited good consistency. These results confirm the validity and accuracy of the reconstruction process.

scholarly journals Cooper minimum of high-order harmonic spectra from an MgO crystal in an ultrashort laser pulse

2020 ◽  
Vol 101 (3) ◽  
Author(s):  
Yiting Zhao ◽  
Xiaoqin Xu ◽  
Shicheng Jiang ◽  
Xi Zhao ◽  
Jigen Chen ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Ultrashort Laser Pulse ◽  
High Order ◽  
High Order Harmonic ◽  
Ultrashort Laser

Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse

2018 ◽  
Vol 27 (2) ◽  
pp. 024206
Author(s):  
Xue-Fei Pan ◽  
Jun Zhang ◽  
Shuai Ben ◽  
Tong-Tong Xu ◽  
Xue-Shen Liu
Keyword(s):  
Laser Pulse ◽  
High Order ◽  
Weak Pulse ◽  
Spectral Redshift

scholarly journals High-order harmonics from an ultraintense laser pulse propagating inside a fiber

2003 ◽  
Vol 67 (1) ◽  
Author(s):  
S. V. Bulanov ◽  
T. Zh. Esirkepov ◽  
N. M. Naumova ◽  
I. V. Sokolov
Keyword(s):  
Laser Pulse ◽  
High Order

scholarly journals Intense local plasma heating by stopping of ultrashort ultraintense laser pulse in dense plasma

2007 ◽  
Vol 25 (4) ◽  
pp. 631-638 ◽  
Author(s):  
W. Yu ◽  
M. Y. Yu ◽  
H. Xu ◽  
Y. W. Tian ◽  
J. Chen ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Plasma Oscillation ◽  
Plasma Heating ◽  
Critical Density ◽  
Deposition Process ◽  
Particle In Cell ◽  
Linearly Polarized ◽  
Plasma Slab ◽  
Cell Simulation ◽  
Channel Boundary

AbstractSelf-trapping, stopping, and absorption of an ultrashort ultraintense linearly polarized laser pulse in a finite plasma slab of near-critical density is investigated by particle-in-cell simulation. As in the underdense plasma, an electron cavity is created by the pressure of the transmitted part of the light pulse and it traps the latter. Since the background plasma is at near-critical density, no wake plasma oscillation is created. The propagating self-trapped light rapidly comes to a stop inside the slab. Subsequent ion Coulomb explosion of the stopped cavity leads to explosive expulsion of its ions and formation of an extended channel having extremely low plasma density. The energetic Coulomb-exploded ions form shock layers of high density and temperature at the channel boundary. In contrast to a propagating pulse in a lower density plasma, here the energy of the trapped light is deposited onto a stationary and highly localized region of the plasma. This highly localized energy-deposition process can be relevant to the fast ignition scheme of inertial fusion.

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