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Christoph Peter Hauri

Cette personne n’est plus à l’EPFL

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Publications associées (85)

Magnetic order dynamics in optically excited multiferroic TbMnO3

Paul Beaud, Christoph Peter Hauri

We performed ultrafast time-resolved near-infrared pump, resonant soft x-ray diffraction probe measurements to investigate the coupling between the photoexcited electronic system and the spin cycloid magnetic order in multiferroic TbMnO3 at low temperature ...

Amer Physical Soc2015

Femtosecond resolution timing jitter correction on a TW scale Ti:sapphire laser system for FEL pump-probe experiments

Christoph Peter Hauri

Intense ultrashort pulse lasers are used for fs resolution pumpprobe experiments more and more at large scale facilities, such as free electron lasers (FEL). Measurement of the arrival time of the laser pulses and stabilization to the machine or other sub- ...

Optical Society of America2015

Air nonlinear dynamics initiated by ultra-intense lambda-cubic terahertz pulses

Mostafa Shalaby, Christoph Peter Hauri

We report on the measurement of the instantaneous Kerr nonlinearity and the retarded alignment of air molecules CO2, N-2, and O-2 triggered by an intense, lambda-cubic terahertz pulse, a diffraction-and transform-limited single-cycle pulse. The strong-fiel ...

AIP American Institute of Physics2015

Intense, carrier frequency and bandwidth tunable quasi single-cycle pulses from an organic emitter covering the Terahertz frequency gap

Christoph Peter Hauri

In Terahertz (THz) science, one of the long-standing challenges has been the formation of spectrally dense, single-cycle pulses with tunable duration and spectrum across the frequency range of 0.1–15 THz (THz gap). This frequency band, lying between the el ...

Nature Publishing Group2015

High efficiency THz generation in DSTMS, DAST and OH1 pumped by Cr:forsterite laser

Christoph Peter Hauri

We investigated Terahertz generation in organic crystals DSTMS, DAST and OH1 directly pumped by a Cr:forsterite laser at central wavelength of 1.25 mu m. This pump laser technology provides a laser-to-THz energy conversion efficiency higher than 3 percent. ...

Optical Society of America2015

Laser arrival measurement tools for SwissFEL

Christoph Peter Hauri

SwissFEL is aiming to produce X-ray pulses from 30 fs down to the attosecond time scale. This requires the compression of the several picosecond long electron bunches produced by a photo-injector to sub-fs level. To achieve this, 40fs accurate injection of ...

Spie-Int Soc Optical Engineering2015

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

Mostafa Shalaby, Christoph Peter Hauri

The brightness of a light source defines its applicability to nonlinear phenomena in science. Bright low-frequency terahertz (

Nature Research2015

Towards enabling femtosecond helicity-dependent spectroscopy with high-harmonic sources

Fernando Ardana Lamas, Christoph Peter Hauri

Recent advances in high-harmonic generation gave rise to soft X-ray pulses with higher intensity, shorter duration and higher photon energy. One of the remaining shortages of this source is its restriction to linear polarization, since the yield of generat ...

Nature Publishing Group2015

Temporal and spectral shaping of broadband terahertz pulses in a photoexcited semiconductor

Mostafa Shalaby, Christoph Peter Hauri

Transmission through a photoexcited semiconductor is used to temporally and spectrally shape a terahertz (THz) pulse. By adjusting the optical pump-THz probe delay, we experimentally introduce a polar asymmetry in the pulse profile as large as 92%. To shap ...

AIP American Institute of Physics2015

High-performing nonlinear visualization of terahertz radiation on a silicon charge-coupled device

Mostafa Shalaby, Christoph Peter Hauri

Photoinduced electron transitions can lead to significant changes of the macroscopic electronic properties in semiconductors. This principle is responsible for the detection of light with charge-coupled devices. Their spectral sensitivity is limited by the ...

Nature Publishing Group2015

Generation of 1.5-octave intense infrared pulses by nonlinear interactions in DAST crystal

Christoph Peter Hauri

Infrared pulses with large spectral width extending from 1.2 to 3.4 μm are generated in the organic crystal DAST (4-N, N-dimethylamino-4′-N′-methylstilbazolium tosylate). The input pulse has a central wavelength of 1.5 μm and 65 fs duration. With 2.8 mJ in ...

Iop Publishing Ltd2015

Filling the Entire Terahertz Frequency Gap by Single-Cycle MV/Cm Pulses

Fernando Ardana Lamas, Christoph Peter Hauri

We demonstrate highly efficient Terahertz production and absolute phase control in the hardly accessible THz frequency gap (1-15 THz) by optical rectification in organic crystals leading to single-cycle field oscillations beyond 150MV/m and 0.5 Tesla. ...

Springer-Verlag Berlin2015

High field broadband THz generation in organic materials

Christoph Peter Hauri

Organic salt crystals, e.g. DAST, OH1, and DSTMS, pumped by ultra-short infrared laser are efficient THz emitters. We review our latest results on the generation in organic crystals of THz single-cycle transients with field strength of 1.5 MV/cm. The energ ...

Taylor & Francis2015

Coherent Ultrafast Magnetization Dynamics Non-resonantly Induced in Cobalt by an Intense Terahertz Transient

Fernando Ardana Lamas, Christoph Peter Hauri

We demonstrate non-resonant magnetization dynamics in the ferromagnetic cobalt thin film induced by a record high-field Terahertz pulse. The magnetization dynamics are coherent and exactly follow the THz carrier oscillations. ...

Springer International Publishing2015

Intrinsic emittance reduction of copper cathodes by laser wavelength tuning in an rf photoinjector

Thomas Schietinger, Christoph Peter Hauri

With the improvement of acceleration techniques, the intrinsic emittance of the cathode has a strong impact on the final brightness of a free electron laser. The systematic studies presented in this paper demonstrate for the first time in a radiofrequency ...

American Physical Society2015

Spectrally intense terahertz source based on triangular Selenium

Mostafa Shalaby, Christoph Peter Hauri

The intensity of a nonlinear terahertz (THz) source is primarily given by its spectral density. In this letter, we introduce triangular Selinium (Se) as a novel THz emitter and show numerically its superior properties to the currently used crystals for int ...

Nature Publishing Group2015

Generation of broadband THz pulses in organic crystal OH1 at room temperature and 10 K

Christoph Peter Hauri

We studied the effects of cryogenic cooling of a 2-[ 3-(4hydroxystyryl)-5, 5-dimethylcyclohex-2-enylidene] malononitrile (OH1) crystal on the generation of broadband THz pulses via collinear optical rectification of 1350 nm femtosecond laser pulses. Coolin ...

Optical Society of America2014

Large-Amplitude Spin Dynamics Driven by a THz Pulse in Resonance with an Electromagnon

Paul Beaud, Christoph Peter Hauri

Multiferroics have attracted strong interest for potential applications where electric fields control magnetic order. The ultimate speed of control via magnetoelectric coupling, however, remains largely unexplored. Here, we report an experiment in which we ...

American Association for the Advancement of Science2014

MV/cm Terahertz transients in the THz gap (1-20 THz) from organic crystals

Christoph Peter Hauri

OSA2014

Coherent ultrafast magnetization dynamics non-resonantly induced in cobalt by an intense Terahertz transient

Peter Derlet, Fernando Ardana Lamas, Christoph Peter Hauri

OSA2014

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