115 citations · 514 across the 19 of their papers we have counts for
19 papers
Plasmon-enhanced circular dichroism spectroscopy of chiral drug solutions
Matteo Venturi, Raju Adhikary, Ambaresh Sahoo +9
We investigate the potential of surface plasmon polaritons at noble metal interfaces for surface-enhanced chiroptical sensing of dilute chiral drug solutions. The high quality fact…
Valleytronics in bulk MoS by optical control of parity and time symmetries
Igor Tyulnev, Álvaro Jiménez-Galán, Julita Poborska +7
The valley degree of freedom of electrons in materials promises routes toward energy-efficient information storage with enticing prospects towards quantum information processing. C…
Temporal self-compression and self-frequency shift of sub-microjoule pulses at 8 MHz repetition rate
Francesco Tani, Jacob Lampen, Martin Butryn +4
We combine soliton dynamics in gas-filled hollow-core photonic crystal fibers with a state-of-the-art fiber laser to realize a turn-key system producing few-fs pulses at 8 MHz repe…
Deep-UV-enhanced supercontinuum generated in tapered gas-filled photonic crystal fiber
Mallika Irene Suresh, Jonas Hammer, Nicolas Y. Joly +2
We present the use of linearly down-tapered gas-filled hollow-core photonic crystal fiber in a single-stage, pumped with pulses from a compact infrared laser source, to generate a…
High-brightness seven-octave carrier envelope phase-stable light source
Ugaitz Elu, Luke Maidment, Lenard Vamos +8
High-brightness sources of coherent and few-cycle-duration light waveforms with spectral coverage from the UV to the THz would offer unprecedented versatility and opportunities for…
Covariance spectroscopy of molecular gases using fs pulse bursts created by modulational instability in gas-filled hollow-core fiber
Mallika Irene Suresh, Philip St. J. Russell, Francesco Tani
We present a technique that uses noisy broadband pulse bursts generated by modulational instability to probe nonlinear processes, including infrared-inactive Raman transitions, in…
Spatio-temporal measurement of ionization-induced modal index changes in gas-filled PCF by prism-assisted side-coupling
Barbara M. Trabold, Mallika I. Suresh, Johannes R. Koehler +3
We report the use of prism-assisted side-coupling to investigate the spatio-temporal dynamics of photoionization in an Ar-filled hollow-core photonic crystal fiber. By launching fo…
Pump-probe study of plasma dynamics in gas-filled photonic crystal fiber using counter-propagating solitons
Mallika I. Suresh, Felix Köttig, Johannes R. Koehler +2
We present a pump-probe technique for monitoring ultrafast polarizability changes. In particular, we use it to measure the plasma density created at the temporal focus of a self-co…
Modulational-instability-free pulse compression in anti-resonant hollow-core photonic crystal fiber
F. Köttig, F. Tani, P. St. J. Russell
Gas-filled hollow-core photonic crystal fiber (PCF) is used for efficient nonlinear temporal compression of femtosecond laser pulses, two main schemes being direct soliton-effect s…
Efficient single-cycle pulse compression of an ytterbium fiber laser at 10 MHz repetition rate
F. Köttig, D. Schade, J. R. Koehler +2
Over the past years, ultrafast lasers with average powers in the 100 W range have become a mature technology, with a multitude of applications in science and technology. Nonlinear…
CEP-stable soliton-based pulse compression to 4.4 fs and UV generation at 800 kHz repetition rate
Alexey Ermolov, Christian Heide, Philip Dienstbier +4
We report generation of a femtosecond supercontinuum extending from the ultraviolet to the near-infrared and detection of its carrier-envelope phase variation by f-to-2f interferom…
UV soliton dynamics and Raman-enhanced supercontinuum generation in photonic crystal fiber
Pooria Hosseini, Alexey Ermolov, Francesco Tani +2
Ultrafast broadband ultraviolet radiation is of importance in spectroscopy and photochemistry, since high photon energies enable single-photon excitations and ultrashort pulses all…
Direct characterisation of tuneable few-femtosecond dispersive-wave pulses in the deep UV
Christian Brahms, Dane R. Austin, Francesco Tani +6
Dispersive wave emission (DWE) in gas-filled hollow-core dielectric waveguides is a promising source of tuneable coherent and broadband radiation, but so far the generation of few-…
Long-lived refractive index changes induced by femtosecond ionization in gas-filled single-ring photonic crystal fibers
Johannes R. Koehler, Felix Köttig, Barbara M. Trabold +2
We investigate refractive index changes caused by femtosecond photoionization in a gas-filled hollow-core photonic crystal fiber. Using spatially-resolved interferometric side-prob…
Effect of anti-crossings with cladding resonances on ultrafast nonlinear dynamics in gas-filled PCFs
Francesco Tani, Felix Köttig, David Novoa +2
Spectral anti-crossings between the fundamental guided mode and core wall resonances alter the dispersion in hollow-core anti-resonant-reflection photonic crystal fibers. Here we s…
Soliton-effect self-compressed single-cycle 9.6-W mid-IR pulses from a 21-W OPCPA at 3.25 μm and 160 kHz
Ugaitz Elu, Matthias Baudisch, Hugo Pires +6
We report a 21-W mid-IR OPCPA that generates 131-μJ and 97 fs (sub-9-cycle) pulses at 160 kHz repetition rate and at a centre wavelength of 3.25 μm. Pulse-to-pulse stability of the…
Continuously wavelength-tunable high harmonic generation via soliton dynamics
Francesco Tani, Michael H. Frosz, John C. Travers +1
We report generation of high harmonics in a gas-jet pumped by pulses self-compressed in a He-filled hollow-core photonic crystal fiber through the soliton effect. The gas-jet is pl…
PHz-wide spectral interference through coherent plasma-induced fission of higher-order solitons
F. Köttig, F. Tani, J. C. Travers +1
We identify a novel regime of soliton-plasma interactions in which high-intensity ultrashort pulses of intermediate soliton order undergo coherent plasma-induced fission. Experimen…
Multi-GeV Electron Spectrometer
R. Faccini, F. Anelli, A. Bacci +34
The advance in laser plasma acceleration techniques pushes the regime of the resulting accelerated particles to higher energies and intensities. In particular the upcoming experime…