Terahertz radiation generation by three-color laser pulses in air filament

Vaičaitis, V.; Balachninaitė, Ona; Morgner, Uwe; Babushkin, Ihar

doi:10.1063/1.5078683

Cited by 39 publications

(14 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, the first coherent THz radiation from a laser-induced gas plasma was observed by Hamster et al in 1993. [132] A simple schematic of the principle is shown in Figure 22. THz pulses generated by a small-scale kHz-repetition-rate regenerative amplifier were demonstrated from the current surge following photoionization of air with an applied DC bias field of about 10 kV cm −1 .…”

Section: Thz Sources Based On Laser-filament-induced Plasmasmentioning

confidence: 99%

Laser‐Driven Strong‐Field Terahertz Sources

Fülöp

Tzortzakis

Kampfrath

2019

Advanced Optical Materials

285

147

View full text Add to dashboard Cite

reason for this interest relies on the fact that THz radiation can couple resonantly to numerous fundamental motions of ions, electrons, and electron spins in all phases of matter. For example, in solids, the THz range overlaps with the frequency of lattice vibrations (phonons), the collision rates of conduction electrons, the binding energy of bound electron-hole pairs (excitons), and the precession frequency of spin waves (magnons). Consequently, THz radiation, both continuous-wave and pulsed, has been used for characterization of and gaining insight into elementary processes in complex materials. The majority of these studies used relatively weak THz fields and, thus, probed the linear response of the material, without inducing notable material modifications.Only recently, however, completely new avenues in THz science were opened up by triggering nonlinear THz responses of materials. [3][4][5][6][7][8][9][10][11][12][13] Instead of using weak fields to primarily observe selected THz modes such as phonons or magnons, strong fields allow one to actively drive them to unprecedentedly large amplitudes, potentially thereby resulting in novel states of matter. [6,8,11] For example, simulations suggest that exciting matter with intense THz transients may lead to massive modifications of electrically [14] or magnetically [15] ordered domains and enable the acceleration of free ions to ≈1 MeV, [16] and postacceleration to 50-100 MeV energies. [17] Remarkable experimental results such as switching of magnetic order, [18,19] parametric amplification of optical phonons, [20] novel insights into spin-lattice coupling, [21,22] and acceleration of free electrons in a THz linear accelerator [23] were achieved only recently. This progress has been made possible by the development of laser-driven table-top THz sources routinely providing pulses with unprecedented energies and peak electric and magnetic field strengths throughout the entire THz spectral range. Different laser-based THz pulse generation techniques can be used to access different parts of the spectral range extending from 0.1 to 10 THz. Some of the recently developed technologies enable the generation of radiation with even larger bandwidth or tuning range up to 100 THz and beyond, which lead to an extension of what is called the THz spectral range. An overview of the approximate spectral coverage and the achieved highest pulse energies and peak electric-field strengths of various laserdriven technologies is given in Figure 1. ScopeIn this work, the basic principles of femtosecond-laser-driven intense pulsed THz sources and their recent development are reviewed. These sources are capable of delivering peak electric field strengths on the MV cm −1 scale. Corresponding typical THz pulse energies are on the µJ-to-mJ level, depending on A review on the recent development of intense laser-driven terahertz (THz) sources is provided here. The technologies discussed include various types of sources based on optical rectification (OR), spintronic emitters, and laserfilame...

show abstract

Section: Thz Sources Based On Laser-filament-induced Plasmasmentioning

confidence: 99%

Laser‐Driven Strong‐Field Terahertz Sources

Fülöp

Tzortzakis

Kampfrath

2019

Advanced Optical Materials

285

147

View full text Add to dashboard Cite

show abstract

“…Unfortunately, active control and stabilization of the relative phases between N-color optical fields (N ≥ 3) in experiments are not all trivial and normally require complex feedback loops with attosecond control precision based on interferometer phase measurement [28,29]. Therefore, THz generation using a femtosecond sawtooth-like wave has not yet been experimentally demonstrated, although THz enhancement has been observed with three-color fields obtained from Optical Parametric Amplifier (OPA), where the relative phases between the optical fields are usually not fixed [30,31].…”

Section: Introductionmentioning

confidence: 99%

Coherent control of boosted terahertz radiation from air plasma pumped by a femtosecond three-color sawtooth field

Fan

et al. 2020

Phys. Rev. A

View full text Add to dashboard Cite

We report on the coherent control of boosted ultrashort terahertz pulse emitted from air plasma pumped by a femtosecond sawtooth pulse composed of three optical harmonic fields. With an in-line optical setup, the relative phases between the three optical components of the pump pulse can be varied independently with attosecond precision without the complexity of external phase stabilization. We observe that the amplitude of the terahertz emission pumped by the phase-optimized sawtooth wave is enhanced by 1.8 times compared to the widely used two-color scheme. Moreover, by manipulating the relative phases between the three colors at attosecond precision, coherent control of the azimuthal angle, ellipticity, and polarity of THz radiation is achieved. A local current model reproduces well the coherent control observations.

show abstract

“…Alongside flourishing fields of application, recent years have seen rapid development of table-top THz sources, including broadband THz pulses generated from plasmas [12][13][14][15] , low frequency pulses in the range of ~ 10 µJ from large area semiconductor switches [16][17][18] , or spin emitter heterostructures 19,20 . Among the table-top sources the most common method is intra-pulse difference frequency generation (DFG) of intense ultrashort laser pulses in nonlinear materials due to both its versatility and scalability.…”

Section: Introductionmentioning

confidence: 99%

Robust optimization of single-cycle THz setups based on phase-matching via tilted pulse fronts using an incident-fluence metric

Kroh

Rohwer

Wang

et al. 2020

Nonlinear Frequency Generation and Conversion: Materials and Devices XIX

View full text Add to dashboard Cite

Despite the popularity and ubiquitousness of the tilted-pulse-front technique for single-cycle terahertz (THz) generation, optimization of the experimental setup remains complex and difficult due to the sensitive dependence on and coupling between the optical pulse parameters, including fluence, beam size, angular dispersion and temporal compression. Here we present a systematic and robust method to tune the tilted pulse-front setup, based on use of selected multi-dimensional scans, which enables a straight-forward and accurate determination of optimum parameter values. Our methodology not only allows us to determine parameter sensitivities and achieve a robust optimum in the performance, but also enables a verification of certain physical properties of the lithium niobate prism, including the THz refractive index. The detailed step-by-step procedure is discussed and applied to a tilted-pulse-front THz setup at both room temperature and cryogenic temperatures. The procedure can be applied to any setup based on the tilted-pulse-front geometry and is important for the construction of high energy THz sources required for strong field terahertz applications such as novel particle acceleration schemes or beam manipulators.

show abstract

Terahertz radiation generation by three-color laser pulses in air filament

Cited by 39 publications

References 44 publications

Laser‐Driven Strong‐Field Terahertz Sources

Laser‐Driven Strong‐Field Terahertz Sources

Coherent control of boosted terahertz radiation from air plasma pumped by a femtosecond three-color sawtooth field

Robust optimization of single-cycle THz setups based on phase-matching via tilted pulse fronts using an incident-fluence metric

Contact Info

Product

Resources

About