Strong-field single-cycle THz pulses generated in an organic crystal

Hauri, Christoph P.; Ruchert, Clemens; Vicario, C.; Ardana, Fernando

doi:10.1063/1.3655331

Cited by 199 publications

(144 citation statements)

References 21 publications

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“…Although sources [9][10][11][12][13] and detectors technologies 14 have evolved rapidly over the past years, THz radiation is still difficult to manipulate mainly because of the lack of both suitable materials and efficient modulation (control) techniques. Terahertz modulation has been demonstrated by optical [15][16][17][18][19][20] , electronic [21][22][23] , and thermal [24][25] means.…”

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confidence: 99%

Terahertz magnetic modulator based on magnetically clustered nanoparticles

Shalaby

Peccianti

Öztürk

et al. 2014

Applied Physics Letters

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confidence: 99%

Terahertz magnetic modulator based on magnetically clustered nanoparticles

Shalaby

Peccianti

Öztürk

et al. 2014

Applied Physics Letters

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“…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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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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“…11 The temporal THz field shape of the resulting 50 µJ THz pulse is measured by electrooptical means in a 50 µm thin GaP <110> crystal with a balanced photodiode detection scheme. 10,12,13 The maximum field strength was calculated from the THz focus size, temporal trace, and pulse energy from a calibrated THz energy meter (Gentec THz12D-3S). 10 To induce the Kerr modulation, the intense terahertz pulse co-propagates through a diamond window collinearly with the 50 fs pulse centered at 800 nm to be switched.…”

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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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Strong-field single-cycle THz pulses generated in an organic crystal

Cited by 199 publications

References 21 publications

Terahertz magnetic modulator based on magnetically clustered nanoparticles

Terahertz magnetic modulator based on magnetically clustered nanoparticles

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

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

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