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Christoph Peter Hauri

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Related publications (84)

Page 3 of 5

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

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

High-energy terahertz pulses from organic crystals: DAST and DSTMS pumped at Ti:sapphire wavelength

Christoph Peter Hauri

High-energy terahertz pulses are produced by optical rectification (OR) in organic crystals 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) and 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS) by a Ti: sapphire ...

Optical Soc Amer2013

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

Coherent manipulation of free amino acids fluorescence

Christoph Peter Hauri

Coherent manipulation of molecular wavepackets in biomolecules might contribute to the quest towards label-free cellular imaging and protein identification. We report the use of optimally tailored UV laser pulses in pump-probe depletion experiments that se ...

2012

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

Christoph Peter Hauri, Fernando Ardana Lamas

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

Intense THz source based on BNA organic crystal pumped at conventional Ti:Sapphire wavelength

Christoph Peter Hauri

We report on high-energy terahertz pulses by optical rectification (OR) in the organic crystal N-benzyl-2-methyl-4-nitroaniline (BNA) directly pumped by a conventional Ti: sapphire amplifier. The simple scheme provides an optical-to-terahertz conversion ef ...

Ieee2016

Vacuum breakdown limit and quantum efficiency obtained for various technical metals using dc and pulsed voltage sources

Christoph Peter Hauri

American Vacuum Society2010

Terahertz-induced demagnetization in ferromagnets

Christoph Peter Hauri

We experimentally demonstrate ultrafast terahertz induced demagnetization in conducting ferromagnets, Ni, Co, and Fe. At even higher excitation fluence, the materials lose their magnetic properties and then get damaged before magnetic switching takes place ...

Ieee2016

Off-resonant magnetization dynamics phase-locked to an intense phase-stable terahertz transient

Christoph Peter Hauri, Fernando Ardana Lamas

Controlling magnetization dynamics with a femtosecond laser is attracting interest both in fundamental science and in industry because of the potential to achieve magnetic switching at ever faster speeds. Here, we report a coherent, phase-locked coupling b ...

Nature Publishing Group2013

High-precision x-ray FEL pulse arrival time measurements at SACLA by a THz streak camera with Xe clusters

Junqiu Liu, Christoph Peter Hauri, Rasmus Ischebeck, Leonid Rivkin, Ishkhan Gorgisyan

The accurate measurement of the arrival time of a hard X-ray free electron laser (FEL) pulse with respect to a laser is of utmost importance for pump-probe experiments proposed or carried out at FEL facilities around the world. This manuscript presents the ...

Optical Society of America2014

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

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

Christoph Peter Hauri

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

Nature Research2015

Self-referenced spectral interferometry for ultrashort infrared pulse characterization

Christoph Peter Hauri

We demonstrate for the first time (to our knowledge) characterization of ultrashort IR pulses by self-referenced spectral interferometry. Both sub-55-fs pulses from 1.4 mu m to 2 mu m and broadband 2.5-cycle pulses at 1.65 mu m (13 fs FWHM) are characteriz ...

Optical Soc Amer2012

Simultaneous electronic and the magnetic excitation of a ferromagnet by intense THz pulses

Christoph Peter Hauri

The speed of magnetization reversal is a key feature in magnetic data storage. Magnetic fields from intense THz pulses have been recently shown to induce small magnetization dynamics in a cobalt thin film on the sub-picosecond time scale. Here, we show tha ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2016

Extreme cross-phase modulation driven by intense THz field

Christoph Peter Hauri

We present giant cross phase modulation of a 60 fs nIR pulse in GaP by means of an intense Terahertz transient. The THz field induces up to 500% spectral broadening supporting sub-10 fs nIR pulses. ...

Ieee2016

Laser-driven generation of intense single-cycle THz field

Christoph Peter Hauri, Fernando Ardana Lamas

We report on laser-based, high power single-cycle THz source. The THz radiation is generated by four-wave mixing in plasma and by optical rectification in organic salt crystal pumped by powerful optical parametric amplifier. The first approach permits the ...

2012

Spectrally intense terahertz source based on triangular Selenium

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

A compact and cost-effective hard X-ray free-electron laser driven by a high-brightness and low-energy electron beam

Majed Chergui, Christoph Peter Hauri, Christopher Alexander Arrell, Giulia Fulvia Mancini, Leonid Rivkin, Rasmus Ischebeck, Eugenio Ferrari, Camila Bacellar Cases Da Silveira, Mike Seidel, Thomas Schmidt

We present the first lasing results of SwissFEL, a hard X-ray free-electron laser (FEL) that recently came into operation at the Paul Scherrer Institute in Switzerland. SwissFEL is a very stable, compact and cost-effective X-ray FEL facility driven by a lo ...

Nature Publishing Group2020

High quantum efficiency, low emittance electron beam from multifilamentary cathodes

Christoph Peter Hauri, Fernando Ardana Lamas

We present a new type of metallic cathode, reaching quantum efficiency of 10(3). This value together with the estimated emittance, gives a brilliance of 2.8x10(13) A/m(2), making this cathode an excellent candidate for an ultrashort electron source. (C) 20 ...

Ieee2012

Extreme laser spectral broadening driven by intense THz field

Christoph Peter Hauri

We present giant spectral broadening by cross phase modulation of a 60 fs nIR pulse in GaP by means of an intense Terahertz transient. The THz field induces up to 500% spectral broadening supporting sub-10 fs nIR pulses. ...

Ieee2016