Impact of laser-ionized liquid nonlinear characteristics on the efficiency of terahertz wave generation

Ponomareva, Evgenia A.; Stumpf, S. A.; Tcypkin, Anton; Kozlov, Sergei A.

doi:10.1364/ol.44.005485

Cited by 19 publications

(9 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section, we numerically investigate the generation of terahertz radiation upon the excitation of liquid media by two collinear laser pulses to obtain a clearer picture of the pulse duration-dependent features. The equations of strong-field dynamics in the isotropic dielectric medium for a three-band system are used for this purpose 19 (see "Methods" section for some additional details). They can be reduced to one field equation, which here is given in its normalized form:…”

Section: Discussionmentioning

confidence: 99%

“…The research on the comparison of plasma and Kerr nonlinearity contributions in the single-pulse excitation case was already done in ref. 19 . Numerical simulation based solely on considering the third-order Kerr nonlinearity leads to the negligible terahertz generation, while the plasma effect seems to determine this process significantly.…”

Section: Discussionmentioning

confidence: 99%

“…Theoretical model features and approximations. To numerically investigate the generation of terahertz radiation upon double-pulse excitation, we consider the equations of strong-field dynamics in the isotropic dielectric medium for the threeband system 19 :…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Varying pre-plasma properties to boost terahertz wave generation in liquids

et al. 2021

Self Cite

View full text Add to dashboard Cite

Laser-driven nonlinear phenomena can both reveal the structural features of materials and become the basis for the development of various translated technologies, including highly intense terahertz sources. Here we realize a modified single-color double-pulse excitation scheme for enhancing the terahertz wave generation in flat liquid jets, and we show that the pre-ionization effect is crucial for finding the optimal input conditions. The experimental results, being supported by numerical simulations, reveal the preference for longer pre-pulses to induce the effective ionization process and shorter signals for the strong laser-plasma interaction. In addition to the identified features of the terahertz wave energy enhancement with respect to the duration change for both pulses and their ratio variation, we state the possibility of achieving the optical-to-THz conversion efficiency value up to 0.1% in the case of double-pulse excitation of an α-pinene jet.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Varying pre-plasma properties to boost terahertz wave generation in liquids

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…The very first source of electromagnetic THz radiation was created at the beginning of the last century by the Soviet scientist A.A. Glagoleva-Arkadyeva 5 . In recent years methods have been developed for efficient generation of high-intensity pulsed THz radiation, for example, the method of optical rectification 6 or generation in plasma [7][8][9] . Under the excitation of high-intensity THz radiation, nonlinear effects of media begin to play a significant role [10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Radiation shift from triple to quadruple frequency caused by the interaction of terahertz pulses with a nonlinear Kerr medium

Artser

Melnik

Ismagilov

et al. 2022

Preprint

View full text Add to dashboard Cite

High-intensity optical radiation propagation in a transparent dielectric medium causes the phenomena of self-action of the pulse and the generation of radiation at triple frequencies due to the cubic nonlinearity of the medium. However, usually the quadratic nonlinear effects outshine the cubic ones in the anisotropic nonlinear crystals. In this work, we demonstrate that for certain experimental parameters the nonlinear effect of the third order can be stronger than one of the second order in MgO:LiNbO3 crystal for terahertz frequency range. We experimentally and theoretically show that it can lead to the significant modification of the classical phenomenon of radiation generation at triple frequencies in the case when the pulse represents only one complete oscillation of the optical field. In the experiment it was shown that the phenomenon of generation of radiation at triple frequencies with respect to the frequency of the maximum spectral density in a nonlinear medium of the pulse disappears, and it is replaced by the generation of radiation at quadruple frequencies. The analysis demonstrates that this effect is based on the asymmetry of the initial spectrum of such extremely short pulses in terms of the number of oscillations.

show abstract

“…However, multiphoton and tunneling ionization are more important in the case of gas. For more information on the theoretical analysis about single-color excitation, please check [15,50,62,63].…”

mentioning

confidence: 99%

Broadband THz Sources from Gases to Liquids

et al. 2021

View full text Add to dashboard Cite

Matters are generally classified within four states: solid, liquid, gas, and plasma. Three of the four states of matter (solid, gas, and plasma) have been used for THz wave generation with short laser pulse excitation for decades, including the recent vigorous development of THz photonics in gases (air plasma). However, the demonstration of THz generation from liquids was conspicuously absent. It is well known that water, the most common liquid, is a strong absorber in the far infrared range. Therefore, liquid water has historically been sworn off as a source for THz radiation. Recently, broadband THz wave generation from a flowing liquid target has been experimentally demonstrated through laser-induced microplasma. The liquid target as the THz source presents unique properties. Specifically, liquids have the comparable material density to that of solids, meaning that laser pulses over a certain area will interact with three orders more molecules than an equivalent cross-section of gases. In contrast with solid targets, the fluidity of liquid allows every laser pulse to interact with a fresh area on the target, meaning that material damage or degradation is not an issue with the high-repetition rate intense laser pulses. These make liquids very promising candidates for the investigation of high-energy-density plasma, as well as the possibility of being the next generation of THz sources.

show abstract

Impact of laser-ionized liquid nonlinear characteristics on the efficiency of terahertz wave generation

Cited by 19 publications

References 21 publications

Varying pre-plasma properties to boost terahertz wave generation in liquids

Varying pre-plasma properties to boost terahertz wave generation in liquids

Radiation shift from triple to quadruple frequency caused by the interaction of terahertz pulses with a nonlinear Kerr medium

Broadband THz Sources from Gases to Liquids

Contact Info

Product

Resources

About