Publications (18)
Cherenkov radiation and scattering of external dispersive waves by two-color solitons
Ivan Oreshnikov, Oliver Melchert, Stephanie Willms +5
For waveguides with two separate regions of anomalous dispersion, it is possible to create a quasi-stable two-color solitary wave. In this paper we consider how those waves interac…
Surface Plasmon Assisted Gentle Ablation of Nanostructures by Femtosecond Oscillator
Liping Shi, Bianca Iwan, Quentin Ripault +16
We experimentally demonstrate the use of subwavelength optical nanoantennae to assist the gentle ablation of nanostructures directly using ultralow fluence from a Ti: sapphire osci…
Tunable sub-20 fs pulses from a 500 kHz OPCPA with 15 W average power based on an all-ytterbium laser
Michele Puppin, Yunpei Deng, Oliver Prochnow +6
An optical parametric chirped pulse amplifier fully based on Yb lasers at 500 kHz is described. Passive optical-synchronization is achieved between a fiber laser-pumped white-light…
Post-compression of a Q-switched laser in a glass-rod multi-pass cell
Peer Biesterfeld, Arthur Schönberg, Marc Seitz +14
Q-switched lasers are compact, cost-effective, and highly pulse energy-scalable sources for nanosecond-scale laser pulses. The technology has been developed for many decades and is…
Determination of the Carrier-Envelope Phase of Few-Cycle Laser Pulses with Terahertz-Emission Spectroscopy
Markus Kress, Torsten Loeffler, Mark D. Thomson +8
The availability of few-cycle optical pulses opens a window to physical phenomena occurring on the attosecond time scale. In order to take full advantage of such pulses, it is cruc…
High order Brunel harmonics and supercontinuum formed by a weak optical pump in presence of a strong terahertz field
Ihar Babushkin, Ayhan Demircan, Uwe Morgner +1
Brunel harmonics appear in the optical response of an atom in process of laser-induced ionization, when the electron leaves the atom and is accelerated in the strong optical field.…
Coherent beam combining with micro-lens arrays
Maike Prossotowicz, Andreas Heimes, Daniel Flamm +5
A novel concept for coherent beam combining is presented based on a simple setup with microlens arrays. These standard components are used in a proof-of-principle experiment for bo…
Mathematical modeling and numerical multigoal-oriented a posteriori error control and adaptivity for a stationary, nonlinear, coupled flow temperature model with temperature dependent density
Sven Beuchler, Ayhan Demircan, Bernhard Endtmayer +2
In this work, we develop adaptive schemes using goal-oriented error control for a highly nonlinear flow temperature model with temperature dependent density. The dual-weighted resi…
Dynamic focus shaping with mixed-aperture coherent beam combining
Maike Prossotowicz, Daniel Flamm, Andreas Heimes +5
A novel concept for dynamic focus shaping based on highly efficient coherent beam combining with microlens arrays (MLA) as combining element is presented. This concept allows to co…
Femtosecond field-driven on-chip unidirectional electronic currents in nonadiabatic tunnelling regime
Liping Shi, Ihar Babushkin, Anton Husakou +10
Recently, asymmetric plasmonic nanojunctions [Karnetzky et. al., Nature Comm. 2471, 9 (2018)] have shown promise as on-chip electronic devices to convert femtosecond optical pulses…
Wave-Shape-Tolerant Photonic Quantum Gates
Ihar Babushkin, Ayhan Demircan, Michael Kues +1
Photons, acting as ``flying qubits'' in propagation geometries such as waveguides, appear unavoidably in the form of wavepackets (pulses). The actual shape of the photonic wavepack…
Compression of CEP-stable multi-mJ laser pulses down to 4 fs in long hollow fibers
Frederik Bohle, Martin Kretschmar, Aurelie Jullien +8
Carrier envelope phase stable 4 fs near-IR pulses with 3 mJ energy were generated by spectral broadening of circularly polarized 8 mJ pulses in a differentially pumped 2 m long com…
Carrier-envelope phase sensitive inversion in two-level systems
Christian Jirauschek, Lingze Duan, Oliver D. Mücke +3
We theoretically study the carrier-envelope phase dependent inversion generated in a two-level system by excitation with a few-cycle pulse. Based on the invariance of the inversion…
Evidence of the quantum-optical nature of high-harmonic generation
David Theidel, Viviane Cotte, René Sondenheimer +11
High-harmonic generation is a light up-conversion process occurring in a strong laser field, leading to coherent bursts of extreme ultrashort broadband radiation [1]. As a new pers…
Compact 200 kHz HHG source driven by a few-cycle OPCPA
Anne Harth, Chen Guo, Yu-Chen Cheng +9
We present efficient high-order harmonic generation (HHG) based on a high-repetition rate, few-cycle, near infrared (NIR), carrier-envelope phase stable, optical parametric chirped…
Metallic nanostructures as electronic billiards for nonlinear terahertz photonics
Ihar Babushkin, Liping Shi, Ayhan Demircan +3
Optical properties of metallic nanoparticles are most often considered in terms of plasmons, the coupled states of light and quasi-free electrons. Here we predict that confinement…
The concept of laser-based conversion electron Mössbauer spectroscopy for a precise energy determination of Th
Lars C. von der Wense, Benedict Seiferle, Christian Schneider +13
Th is the only nucleus currently under investigation for the development of a nuclear optical clock (NOC) of ultra-high accuracy. The insufficient knowledge of the first nu…
Photocurrent-induced harmonics in nanostructures
Ihar Babushkin, Anton Husakou, Liping Shi +3
Photocurrent-induced harmonics appear in gases and solids due to tunnel ionization of electrons in strong fields and subsequent acceleration. In contrast to three-step harmonic emi…