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An experimental study of noise in mid-infrared quantum cascade lasers of different designs

Schilt, Stéphane ; Tombez, Lionel ; Tardy, Camille ; Bismuto, Alfredo ; Blaser, Stéphane ; Maulini, Richard ; Terazzi, Romain ; Rochat, Michel ; Südmeyer, Thomas

In: Applied Physics B, 2015, vol. 119, no. 1, p. 189-201

Two-dimensional mapping of falling water film thickness with near-infrared attenuation

Dupont, J. ; Mignot, G. ; Prasser, H.-M

In: Experiments in Fluids, 2015, vol. 56, no. 5, p. 1-16

How circular dichroism in time- and angle-resolved photoemission can be used to spectroscopically detect transient topological states in graphene

Schüler, Michael ; Giovannini, Umberto De ; Hübener, Hannes ; Rubio, Angel ; Sentef, Michael A. ; Devereaux, Thomas P. ; Werner, Philipp

In: Physical Review X, 2020, vol. 10, no. 4, p. 041013

Pumping graphene with circularly polarized light is the archetype of light-tailoring topological bands. Realizing the induced Floquet-Chern-insulator state and demonstrating clear experimental evidence for its topological nature has been a challenge, and it has become clear that scattering effects play a crucial role. We tackle this gap between theory and experiment by employing microscopic...

Quantum simulation meets nonequilibrium dynamical mean-field theory: exploring the periodically driven, strongly correlated fermi-hubbard model

Sandholzer, Kilian ; Murakami, Yuta ; Görg, Frederik ; Minguzzi, Joaquín ; Messer, Michael ; Desbuquois, Rémi ; Eckstein, Martin ; Werner, Philipp ; Esslinger, Tilman

In: Physical Review Letters, 2019, vol. 123, no. 19, p. 193602

We perform an ab initio comparison between nonequilibrium dynamical mean-field theory and optical lattice experiments by studying the time evolution of double occupations in the periodically driven Fermi-Hubbard model. For off-resonant driving, the range of validity of a description in terms of an effective static Hamiltonian is determined and its breakdown due to energy absorption close to...

Terahertz vortex beam as a spectroscopic probe of magnetic excitations

Sirenko, Andrei A. ; Maršík, Premysl ; Bernhard, Christian ; Stanislavchuk, T. N. ; Kiryukhin, V. ; Cheong, S.-W.

In: Physical Review Letters, 2019, vol. 122, no. 23, p. 237401

Circularly polarized light with spin angular momentum is one of the most valuable probes of magnetism. We demonstrate that light beams with orbital angular momentum (OAM), or vortex beams, can also couple to magnetism exhibiting dichroisms in a magnetized medium. Resonant optical absorption in a ferrimagnetic crystal depends strongly on both the handedness of the vortex and the direction of...

The structural colors of photonic glasses

Schertel, Lukas ; Siedentop, Lukas ; Meijer, Janne-Mieke ; Keim, Peter ; Aegerter, Christof M. ; Aubry, Geoffroy J. ; Maret, Georg

In: Advanced Optical Materials, 2019, p. 1900442

The color of materials usually originates from a combination of wavelength‐dependent absorption and scattering. Controlling the color without the use of absorbing dyes is of practical interest, not only because of undesired bleaching properties of dyes but also regarding minimization of environmental and health issues. Color control without dyes can be achieved by tuning the material's...

All-solid-state continuous-wave laser systems for ionization, cooling and quantum state manipulation of beryllium ions

Lo, Hsiang-Yu ; Alonso, Joseba ; Kienzler, Daniel ; Keitch, Benjamin ; de Clercq, Ludwig ; Negnevitsky, Vlad ; Home, Jonathan

In: Applied Physics B, 2014, vol. 114, no. 1-2, p. 17-25

Temperature measurements in sooting counterflow diffusion flames using laser-induced fluorescence of flame-produced nitric oxide

Denisov, A. ; Colmegna, G. ; Jansohn, P.

In: Applied Physics B, 2014, vol. 116, no. 2, p. 339-346

Broadly tunable mid-infrared VECSEL for multiple components hydrocarbon gas sensing

Rey, J. ; Fill, M. ; Felder, F. ; Sigrist, M.

In: Applied Physics B, 2014, vol. 117, no. 3, p. 935-939

Relative timing jitter measurements with an indirect phase comparison method

Paschotta, R. ; Rudin, B. ; Schlatter, A. ; Spühler, G.J. ; Krainer, L. ; Zeller, S.C. ; Haverkamp, N. ; Telle, H.R. ; Keller, U.

In: Applied Physics B, 2005, vol. 80, no. 2, p. 185-192