Publication
Subcycle Extreme Nonlinearities in GaP Induced by an Ultrastrong Terahertz Field
Publications associées (60)
Low frequency terahertz-induced demagnetization in ferromagnetic nickel
Christoph Peter Hauri, Mostafa Shalaby
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 Physics2016Recent progress in acentric core structures for highly efficient nonlinear optical crystals and their supramolecular interactions and terahertz applications
During the past decade, various new types of organic nonlinear optical crystals have been developed to overcome the benchmark stilbazolium DAST (4-(4-(N, N-dimethylamino) styryl)-1-methylpyridinium 4-methylbenzenesulfonate) crystal. Here, we review the ace ...
Royal Society of Chemistry2016Extreme laser spectral broadening driven by intense THz field
Christoph Peter Hauri, Mostafa Shalaby
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. ...
Ieee2016Intense, carrier frequency and bandwidth tunable quasi single-cycle pulses from an organic emitter covering the Terahertz frequency gap
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 Group2015Demonstration of a low-frequency three-dimensional terahertz bullet with extreme brightness
Christoph Peter Hauri, Mostafa Shalaby
The brightness of a light source defines its applicability to nonlinear phenomena in science. Bright low-frequency terahertz (
2015Delivery of ultrashort spatially focused pulses through a multimode fiber
Demetri Psaltis, Christophe Moser, Salma Farahi, Edgar Emilio Morales Delgado
Multimode optical fibers potentially allow the transmission of larger amounts of information than their single mode counterparts because of their high number of supported modes. However, propagation of a light pulse through a multimode fiber suffers from s ...
Spie-Int Soc Optical Engineering2015Temporal and spectral shaping of broadband terahertz pulses in a photoexcited semiconductor
Christoph Peter Hauri, Mostafa Shalaby
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 ...
Amer Inst Physics2015Spectrally intense terahertz source based on triangular Selenium
Christoph Peter Hauri, Mostafa Shalaby
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 ...
2015Manifestation of a Second Dirac Surface State and Bulk Bands in THz Radiation from Topological Insulators
Topological insulators (TIs) are interesting quantum matters that have a narrow bandgap for bulk and a Dirac-cone-like conducting surface state (SS). The recent discovered second Dirac surface state (SS) and bulk bands (BBs) located similar to 1.5 eV above ...
Nature Publishing Group2015Coherent Ultrafast Magnetization Dynamics Non-resonantly Induced in Cobalt by an Intense Terahertz Transient
Christoph Peter Hauri, Fernando Ardana Lamas
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