Experimental investigation of strong-field-ionization theories for laser fields from visible to midinfrared frequencies

Lai, Yu Hang; Xu, Junliang; Szafruga, Urszula B.; Talbert, Bradford K.; Gong, Xiaowei; Zhang, Kaikai; Fuest, Harald; Kling, Matthias F.; Blaga, Cosmin I.; Agostini, Pierre; DiMauro, Louis F.

doi:10.1103/physreva.96.063417

Cited by 52 publications

(26 citation statements)

References 68 publications

(83 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our second route to determining the peak intensity implemented a fit of our data to the Perelomov-Popov-Terent’ev (PPT) 31 formulation of strong-field ionization theory. PPT was recently shown to accurately describe experimental results for multi-cycle pulses from 400 nm to 3.9 μ m 32 . Fitting our data, shown as the dashed blue line in Fig.…”

Section: Resultsmentioning

confidence: 97%

An intense, few-cycle source in the long-wave infrared

Wilson

Summers

Zigo

et al. 2019

Sci Rep

View full text Add to dashboard Cite

For the last several decades, the wavelength range accessible for strong-field, few-cycle studies has remained limited to the visible, near infrared and mid-wave infrared regimes. In particular, sources in the long-wave infrared have been lacking. We report the development of a 1 kHz, few-cycle laser source with up to a 9 μ m central wavelength and gigawatt peak powers. When focused, this source can ionize gas targets, which we demonstrate here through the ionization of atomic xenon at wavelengths ranging from 5 μ m to 9 μ m. This opens up new opportunities for fundamental atomic and molecular physics, enabling experimental tests of strong-field ionization theories in the extreme long-wavelength, few-cycle limit and the direct excitation of vibrational transitions in organic molecules.

show abstract

Section: Resultsmentioning

confidence: 97%

An intense, few-cycle source in the long-wave infrared

Wilson

Summers

Zigo

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The apparent discrepancy between the experiments of Lai et al 48 , showing the validity of the PPT ionization rate formula, and the EID calculations can be explained by the fact that the experiments by Lai et al were conducted at low gas pressures, where the many-body interactions lose their importance. To clarify this situation, Woodbury et al 56 experimentally measured the ionization yield in air, nitrogen, and argon at atmospheric (0.5–3 bar) pressures for 1.024 and 3.9 μm picosecond laser pulses.…”

Section: Medium Responsementioning

confidence: 87%

“…To complete the semi-classical description of ionization for long-wavelength laser pulses, we have to indicate the way to calculate the corresponding ionization rate. Recently, Lai et al 48 experimentally studied the ionization yield versus laser intensity for various atomic targets irradiated by laser pulses with different polarizations and wavelengths ranging from the visible to the mid-infrared (0.4–4 μm) in both the multiphoton and tunneling regimes. The experimental findings were compared to the ionization rate calculated by the Perelomov-Popov-Terent’ev (PPT) formula 49 .…”

Section: Medium Responsementioning

confidence: 99%

Powerful terahertz waves from long-wavelength infrared laser filaments

Fedorov

Tzortzakis

2020

Light Sci Appl

View full text Add to dashboard Cite

Strong terahertz (THz) electric and magnetic transients open up new horizons in science and applications. We review the most promising way of achieving sub-cycle THz pulses with extreme field strengths. During the nonlinear propagation of two-color mid-infrared and far-infrared ultrashort laser pulses, long, and thick plasma strings are produced, where strong photocurrents result in intense THz transients. The corresponding THz electric and magnetic field strengths can potentially reach the gigavolt per centimeter and kilotesla levels, respectively. The intensities of these THz fields enable extreme nonlinear optics and relativistic physics. We offer a comprehensive review, starting from the microscopic physical processes of light-matter interactions with mid-infrared and far-infrared ultrashort laser pulses, the theoretical and numerical advances in the nonlinear propagation of these laser fields, and the most important experimental demonstrations to date.

show abstract

“…Recently, the improved PPT model was used to calibrate the laser intensity in strong-field ionization experiments [23]. It was also demonstrated that the PPT model is fully capable of reproducing single ionization probabilities for atoms in laser fields from the multiphoton to the tunneling ion-ization regimes [24]. While the SFA1 model was used in [15,17], in the present paper we employ the improved PPT model to calculate the single ionization yield for Ne atoms.…”

Section: Theoretical Modelmentioning

confidence: 99%

Pulse-duration dependence of the double-to-single ionization ratio of Ne by intense 780-nm and 800-nm laser fields: Comparison of simulations with experiments

et al. 2019

View full text Add to dashboard Cite

Accurate ab initio calculations of the ratio of double-to-single ionization of Ne atoms in strong laser fields are difficult due to the many-electron nature of the target. Here, with accurate total cross sections carefully evaluated using the state-of-the-art many-electron R-matrix theory for both electron impact ionization and electron impact excitation of Ne + , we simulate the total double ionization yields of Ne 2+ in strong laser fields at 780 nm and 800 nm for pulse durations in the range from 7.5 fs to 200 fs based on the improved quantitative rescattering model. The corresponding single ionization yields of Ne + are calculated within the nonadiabatic tunneling model of Perelomov, Popov, and Terent'ev. The ratio of double-to-single ionization of Ne is then obtained from the calculated double and single ionization yields. By normalizing the ratio to the one calculated from solving the time-dependent Schrödinger equation for a few-cycle short pulse, we make quantitative comparisons of our results with experimental data to show that our model predicts the experimental findings very well. Finally, we analyze the pulse-duration dependence of the double-to-single ionization ratio.

show abstract

Experimental investigation of strong-field-ionization theories for laser fields from visible to midinfrared frequencies

Cited by 52 publications

References 68 publications

An intense, few-cycle source in the long-wave infrared

An intense, few-cycle source in the long-wave infrared

Powerful terahertz waves from long-wavelength infrared laser filaments

Pulse-duration dependence of the double-to-single ionization ratio of Ne by intense 780-nm and 800-nm laser fields: Comparison of simulations with experiments

Contact Info

Product

Resources

About