<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>GV</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant="normal">m</mml:mi></mml:mrow></mml:math>Single-Cycle Terahertz Fields from a Laser-Driven Large-Size Partitioned Organic Crystal

Vicario, C.; Monoszlai, B.; Hauri, Christoph P.

doi:10.1103/physrevlett.112.213901

Cited by 262 publications

(113 citation statements)

References 27 publications

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“…Although efficient THz energy extraction from organic crystals has previously been reported 19,20 , the advance of the present work is the introduction of an effective scheme for enhanced THz wavefront and beam profile control and improved THz beam transport of the multi-octave spanning THz radiation, which compensates for aberrations originating from the source and from THz imaging optics. Figure 1a,b shows the spatial profiles of the optical pump and the generated THz after the DSTMS crystal.…”

Section: Resultsmentioning

confidence: 99%

“…4e). These values were obtained from small aperture organic crystals, in comparison with 0.5 GV m À 1 obtained from a large aperture DSTMS 20 . Figure 4e shows the obtained peak fields when LPF with different cutoff frequencies were used.…”

Section: Discussionmentioning

confidence: 99%

“…Although the former has been ahead in terms of intensity, the availability and versatility of lasers are dominating time-resolved THz high-field science. The most prominent techniques for intense THz pulse generation, by employing a femtosecond amplified laser pulse, are based on laser-driven ion acceleration 16 , emission from a gas plasma 17 and optical rectification in inorganic (for example, LiNbO 3 ) 18 and organic nonlinear crystals (for example, 2-(3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene)malononitrile) (OH1), 4-N,N-dimethylamino-4 0 -N 0 -methyl-stilbazolium tosylate (DAST), 4-N,N-dimethylamino-4 0 -N 0 -methyl-stilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS)) [19][20][21] . So far, the peak fields from these systems have been limited to 0.12-0.5 GV m À 1 .…”

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confidence: 99%

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Demonstration of a low-frequency three-dimensional terahertz bullet with extreme brightness

2015

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The brightness of a light source defines its applicability to nonlinear phenomena in science. Bright low-frequency terahertz (o5 THz) radiation confined to a diffraction-limited spot size is a present hurdle because of the broad bandwidth and long wavelengths associated with terahertz (THz) pulses and because of the lack of THz wavefront correctors. Here using a present-technology system, we employ a wavefront manipulation concept with focusing optimization leading to spatio-temporal confinement of THz energy at its physical limits to the least possible three-dimensional light bullet volume of wavelength-cubic. Our scheme relies on finding the optimum settings of pump wavefront curvature and post generation beam divergence. This leads to a regime of extremely bright PW m À 2 level THz radiation with peak fields up to 8.3 GVm À 1 and 27.7 T surpassing by far any other system. The presented results are foreseen to have a great impact on nonlinear THz applications in different science disciplines.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Demonstration of a low-frequency three-dimensional terahertz bullet with extreme brightness

2015

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“…The THz source used here is an example for an advanced, multi-octave-spanning THz source where the beam quality is generally challenged by spatial inhomogeneities. 10,22,23 Assuming a maximum frequency of 10 THz, the scale of inhomogeneity is expected to be more than 30 µm (due to diffraction limits) which is not smaller than the probe spot size. However, in terms of resolution, the THz imaging technology presently available hardly satisfies the experimental needs for characterizing a tightly focused THz beam 10 and does not give any information about the spatio-temporal evolution of the THz intensity profile.…”

Section: Resultsmentioning

confidence: 99%

Extreme nonlinear terahertz electro-optics in diamond for ultrafast pulse switching

2017

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Polarization switching of picosecond laser pulses is a fundamental concept in signal processing [C. Chen and G. Liu, Annu. Rev. Mater. Sci. 16, 203 (1986); V. R. Almeida et al., Nature 431, 1081 (2004); and A. A. P. Pohl et al., Photonics Sens. 3, 1 (2013)]. Conventional switching devices rely on the electro-optical Pockels effect and work at radio frequencies. The ensuing gating time of several nanoseconds is a bottleneck for faster switches which is set by the performance of state-of-the-art high-voltage electronics. Here we show that by substituting the electric field of several kV/cm provided by modern electronics by the MV/cm field of a single-cycle THz laser pulse, the electro-optical gating process can be driven orders of magnitude faster, at THz frequencies. In this context, we introduce diamond as an exceptional electro-optical material and demonstrate a pulse gating time as fast as 100 fs using sub-cycle THz-induced Kerr nonlinearity. We show that THz-induced switching in the insulator diamond is fully governed by the THz pulse shape. The presented THz-based electro-optical approach overcomes the bandwidth and switching speed limits of conventional MHz/GHz electronics and establishes the ultrafast electro-optical gating technology for the first time in the THz frequency range. We finally show that the presented THz polarization gating technique is applicable for advanced beam diagnostics. As a first example, we demonstrate tomographic reconstruction of a THz pulse in three dimensions.

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“…In the laser-based schemes, THz pulses with field strength [8 MV/cm at 1 kHz repetition rate have been generated via two-color laser filamentation [2]. Single-cycle THz pulse with field strength up to 36 MV/cm can be generated by optical rectification of a mid infrared laser in a large-size nonlinear organic crystals assembly [3]. Electromagnetic radiations have been generated by the interaction of ultrashort lasers with gas-jet plasmas [4,5] and water vapor [6].…”

Section: Introductionmentioning

confidence: 99%

Multifocal terahertz radiation by intense lasers in rippled plasma

2017

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This paper presents a theoretical model for the generation of terahertz radiation by cosh-Gaussian laser beams of high intensity, which are capable of creating relativistic-ponderomotive nonlinearity. We find the components of the terahertz radiation for the relativistic laser plasma interaction, i.e. beating of the two lasers of same amplitude and different frequency in under dense plasma. We plot the electric field profile of the emitted radiation under the effect of lasers index. By creating a dip in peak of the incident lasers' fields, we can achieve multifocal terahertz radiation.

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GV/mSingle-Cycle Terahertz Fields from a Laser-Driven Large-Size Partitioned Organic Crystal

Cited by 262 publications

References 27 publications

Demonstration of a low-frequency three-dimensional terahertz bullet with extreme brightness

Demonstration of a low-frequency three-dimensional terahertz bullet with extreme brightness

Extreme nonlinear terahertz electro-optics in diamond for ultrafast pulse switching

Multifocal terahertz radiation by intense lasers in rippled plasma

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