Tunneling Ionization Study of Linear Molecules in Strong-Field Laser Pulses

2020 ◽  
Vol 65 (1-2) ◽  
pp. 57-68
Author(s):  
V. Petrović ◽  
◽  
H. Delibašić ◽  
I. Petrović ◽  
◽  
...  
Keyword(s):  
Ionization Potential ◽  
Strong Field ◽  
Laser Pulses ◽  
Ionization Rate ◽  
Rate Equations ◽  
Tunneling Ionization ◽  
Low Intensity ◽  
Linear Molecules ◽  
Experimental Findings ◽  
Ionization Rates

"We theoretically studied photoionization of atoms and molecules in the frame of Perelomov-Popov-Terent’ev (PPT) and Ammosov-Delone-Krainov (ADK) theories. Strong-field single ionization of two diatomic molecules, N_2 and O_2, are studied and compared to Ar and Xe atoms, using an 800 nm Ti:sapphire laser in the 3×〖10〗^13 to 1×〖10〗^15 Wcm^(-2) intensity range. To eliminate disagreement between theoretical and experimental findings in a low intensity fields (~6×〖10〗^13 Wcm^(-2)), we considered the influence of shifted ionization potential. Including these effects in the ionization rates, we numerically solved rate equations in order to determine an expression for the ionization yields. The use of modified ionization potential showed that the ionization yields will actually decrease below values predicted by original (uncorrected) formulas. This paper will discuss the causes of this discrepancy. Keywords: tunneling ionization, ionization rate, ionization yield, molecules. "

A theoretical study of vibrational effects on strong field ionization of CS2

2018 ◽  
Vol 17 (08) ◽  
pp. 1850052
Author(s):  
Meixia Zhang ◽  
Guangwen Xu ◽  
Guoying Lu ◽  
Peng Song
Keyword(s):  
Theoretical Study ◽  
Strong Field ◽  
Orientation Angle ◽  
Field Ionization ◽  
Vibrationally Excited ◽  
Tunneling Ionization ◽  
Strong Field Ionization ◽  
Vibration Effect ◽  
Primary Contribution ◽  
Ionization Rates

Tunneling ionization of vibrationally excited CS2 molecules in their ground electronic state is calculated using molecular orbital Ammosov–Delone–Krainov theory (MO-ADK) considering bond length-dependence and bond angle-dependence. The tunneling ionization rates and the corresponding electron density are calculated respectively for different initial states. A relationship between laser intensity and the molecular orientation angle is determined and compared with experimental results, showing excellent agreement. Our calculations show that the primary contribution of vibration effect to CS2 in tunneling ionization is due to the symmetric expansion mode.

Tunneling ionization of air in the strong field of femtosecond laser pulses

JETP Letters ◽  
2009 ◽  
Vol 90 (3) ◽  
pp. 181-185 ◽  
Author(s):  
A. A. Ionin ◽  
S. I. Kudryashov ◽  
L. V. Seleznev ◽  
D. V. Sinitsyn
Keyword(s):  
Femtosecond Laser ◽  
Strong Field ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Tunneling Ionization

scholarly journals Two-dimensional photoelectron holography in strong-field tunneling ionization by counter rotating two-color circularly polarized laser pulses

2019 ◽  
Vol 27 (22) ◽  
pp. 32193 ◽  
Author(s):  
Qinghua Ke ◽  
Yueming Zhou ◽  
Jia Tan ◽  
Mingrui He ◽  
Jintai Liang ◽  
...  
Keyword(s):  
Strong Field ◽  
Laser Pulses ◽  
Two Dimensional ◽  
Circularly Polarized ◽  
Tunneling Ionization

scholarly journals Metastable noble gas atoms in strong-field ionization experiments

2016 ◽  
Vol 4 ◽  
Author(s):  
J. E. Calvert ◽  
A. J. Palmer ◽  
I. V. Litvinyuk ◽  
R. T. Sang
Keyword(s):  
Ionization Potential ◽  
Atomic Structure ◽  
Strong Field ◽  
Noble Gas ◽  
Laser Pulses ◽  
Metastable States ◽  
Current Work ◽  
Field Ionization ◽  
Experimental Conditions ◽  
Strong Field Ionization

The interactions of strong-field few-cycle laser pulses with metastable states of noble gas atoms are examined. Metastable noble gas atoms offer a combination of low ionization potential and a relatively simple atomic structure, making them excellent targets for examining ionization dynamics in varying experimental conditions. A review of the current work performed on metastable noble gas atoms is presented.

Accurate Structure Parameters for Tunneling Ionization Rates of Gas-Phase Linear Molecules

2017 ◽  
Vol 67 (3) ◽  
pp. 289
Author(s):  
Song-Feng Zhao ◽  
Jian-Ke Li ◽  
Guo-Li Wang ◽  
Peng-Cheng Li ◽  
Xiao-Xin Zhou
Keyword(s):  
Gas Phase ◽  
Structure Parameters ◽  
Tunneling Ionization ◽  
Linear Molecules ◽  
Ionization Rates

The interaction of low-intensity femtosecond laser pulses with a copper foil

2008 ◽  
Author(s):  
Nikolai G. Karlykhanov ◽  
V.A. Lykov ◽  
A.T. Sapozhnikov ◽  
Sean Kirkwood ◽  
Ying Y. Tsui ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Copper Foil ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Low Intensity

Imaging of strong field dissociative single and double ionization channels of N2O

2017 ◽  
Vol 31 (29) ◽  
pp. 1750215 ◽  
Author(s):  
Feras Afaneh ◽  
Horst Schmidt-Böcking
Keyword(s):  
Angular Distribution ◽  
Laser Pulse ◽  
Momentum Distribution ◽  
Strong Field ◽  
Double Ionization ◽  
Photoelectron Angular Distribution ◽  
Ionization Processes ◽  
Elliptically Polarized ◽  
Molecular Frame ◽  
Ionization Rates

In this paper, we study single and double ionizations of N2O in a short elliptically polarized 800 nm laser pulse using the COLTRIMS technique. The molecular-frame photoelectron angular distribution and the ion sum-momentum distribution of single and double ionizations of N2O molecules are reported for the single ionization dissociative channel NO[Formula: see text] + N and the double ionization dissociative channel NO[Formula: see text] + N[Formula: see text]. The ionizations of multiple orbitals for the two studied dissociative channels were identified via studying the orientation dependent ionization rates for their KERs. The results show that the shape of the ionizing orbitals governs the single and double ionization processes of N2O.

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