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Christoph Peter Hauri

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Publications associées (85)

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

Lukas Stingelin, Majed Chergui, Paul Beaud, Thomas Schietinger, Christopher Alexander Arrell, Thomas Schmidt, Leonid Rivkin, Christoph Peter Hauri, Giulia Fulvia Mancini, Rasmus Ischebeck, Eugenio Ferrari, Camila Bacellar Cases Da Silveira, Mike Seidel, Paolo Craievich, Sven Reiche

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

Generation of strong-field spectrally tunable terahertz pulses

Christoph Peter Hauri

The ideal laser source for nonlinear terahertz spectroscopy offers large versatility delivering both ultra-intense broadband single-cycle pulses and user-selectable multi-cycle pulses at narrow linewidths. Here we show a highly versatile terahertz laser pl ...

2020

Experimental station Bernina at SwissFEL: condensed matter physics on femtosecond time scales investigated by X-ray diffraction and spectroscopic methods

Paul Beaud, Christopher Alexander Arrell, Christoph Peter Hauri, Giulia Fulvia Mancini, Jochen Rittmann

The Bernina instrument at the SwissFEL Aramis hard X-ray free-electron laser is designed for studying ultrafast phenomena in condensed matter and material science. Ultrashort pulses from an optical laser system covering a large wavelength range can be used ...

International Union of Crystallography (IUCr)2019

Coherent and incoherent ultrafast magnetization dynamics in 3d ferromagnets driven by extreme terahertz fields

Mostafa Shalaby, Christoph Peter Hauri

2018

Spectrally intense terahertz source based on triangular selenium

Mostafa Shalaby, Christoph Peter Hauri

We show that triangular selenium has excellent phase matching for THz generation through optical rectification in the range 0.1-4 THz. The performance exceeds that of the state-of-the-art organic crystals. ...

Ieee2016

Simultaneous electronic and magnetic excitation of cobalt by intense THz pulses

Mostafa Shalaby, Christoph Peter Hauri

We study the interaction of intense THz magnetic fields with ferromagnetic thin films. At higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film. ...

Ieee2016

Air nonlinearity triggered by an ultra-intense 33 MV/cm and sub-5 THz light bullet

Mostafa Shalaby, Christoph Peter Hauri

We report on measurements of the instantaneous Kerr nonlinearity and the retarded alignment of non-polar molecules CO2, N-2, and O-2 by an intense, lambda-cubic terahertz pulse with peak field > 33 MV/cm centered at 3.9 THz. ...

Ieee2016

Low frequency terahertz-induced demagnetization in ferromagnetic nickel

Mostafa Shalaby, Christoph Peter Hauri

A laser stimulus at terahertz (THz) frequency is expected to offer superior control over magnetization dynamics compared to an optical pulse, where ultrafast demagnetization is mediated by heat deposition. As a THz field cycle occurs on a timescale similar ...

Amer Inst Physics2016

Visualization of Terahertz radiation on silicon-based CCD and CMOS sensor at high resolution

Mostafa Shalaby, Christoph Peter Hauri

Low frequency THz radiation is visualized by means of a charged-coupled device designed for optical frequencies and a CMOS sensor. This technological advance opens novel opportunities in THz imaging as it offers smallest pixel size and large chip size at l ...

Ieee2016

Multi-mJ infrared femtosecond hydrogen Raman laser

Mostafa Shalaby, Christoph Peter Hauri

High-energy pulses at 1.28 mu m are demonstrated by stimulated Raman scattering in hydrogen using two chirped pulses of a Ti: Sapphire laser. The Stokes pulse carrying record-high energy of 4.4 mJ is recompressed to 80 fs. ...

Ieee2016

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

Mostafa Shalaby, 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

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

Mostafa Shalaby, 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

High-energy femtosecond hydrogen Raman laser

Mostafa Shalaby, Christoph Peter Hauri

High-energy pulses at 1.28 mu m are demonstrated by stimulated Raman scattering using two chirped pulses of a Ti:Sapphire laser in hydrogen. The Stokes pulse carrying record-high energy of 4.4 mJ is recompressed to 80 fs. ...

Ieee2016

Extreme cross-phase modulation driven by intense THz field

Mostafa Shalaby, 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

The SwissFEL Experimental Laser facility

Christoph Peter Hauri

International Union of Crystallography (IUCr)2016

High-power femtosecond Raman frequency shifter

Mostafa Shalaby, Christoph Peter Hauri

We report on the generation of broadband, high-energy femtosecond pulses centered at 1.28 mu m by stimulated Raman scattering in a pressurized hydrogen cell. Stimulated Raman scattering is performed by two chirped and delayed pulses originating from a mult ...

Optical Soc Amer2016

Terahertz-induced demagnetization in ferromagnets

Mostafa Shalaby, 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

Anomalous visualization of sub-2 THz radiation on silicon- based CMOS and CCD sensors

Christoph Peter Hauri

Low frequency THz radiation is visualized on common optically-designed CCD and CMOS sensors. The CCD/CMOS technology offers smallest pixel size, large chip, very cheap cost, insensitivity to background noise, and multispectral detection. ...

Ieee2016

Extreme laser spectral broadening driven by intense THz field

Mostafa Shalaby, 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

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

Mostafa Shalaby, 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 eff ...

Optical Soc Amer2016

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