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Experimentally verified design guidelines for minimizing the gray zone width of Josephson comparators
We investigated the gray zone width of Josephson comparators by means of circuit simulations and experiments, looking at the dependences on different circuit parameters and topologies. Eight different...
PublikationenLosses in coplanar waveguide resonators at millikelvin temperatures
We study the loss rate for a set of lambda/2 coplanar waveguide resonators at millikelvin temperatures (20–900 mK) and different applied powers (3•10−19–10−12 W). The loss rate becomes power...
PublikationenMultiphoton excitations and inverse population in a system of two flux qubits
We study the multiphoton spectroscopy of artificial solid-state four-level quantum system. This system is formed by two coupled superconducting flux qubits. When multiple driving frequency of the applied...
PublikationenSplitting of a moving transverse domain wall in a magnetic nanostripe in a transverse field
The field-driven domain-wall dynamics in magnetic nanostripes under the influence of transverse fields was examined experimentally and by numerical simulations. For a small range of transverse fields in...
PublikationenSilicon nanowire oxidation: the influence of sidewall structure and gold distribution
The oxidation behavior of Si nanowires (SiNWs) grown by the gold (Au) catalyzed vapor–liquid–solid (VLS) growth process in an electron beam evaporation (EBE) reactor is studied. The VLS SiNWs exhibit...
PublikationenThree-Dimensional Light Bullets in Arrays of Waveguides
We report the first experimental observation of three-dimensional light bullets, excited by femtosecond pulses in a system featuring quasi-instantaneous cubic nonlinearity and a periodic, transversally...
PublikationenNoise-induced quantum coherence and persistent Rabi oscillations in a Josephson flux qubit
We predict theoretically the enhancement of quantum coherence in a superconducting flux qubit by a classical external noise. First, the off-diagonal components of the qubit density matrix are increased....
PublikationenSwitching of magnetic anisotropy in epitaxial CoFe2O4 thin films induced by SrRuO3 buffer layer
The magnetic anisotropy of epitaxial spinel ferrite CoFe2O4 films grown on SrTiO3 substrates by pulsed laser deposition can be reoriented by inserting a thin SrRuO3 buffer layer. Without SrRuO3, the CoFe2O4...
PublikationenNear-field investigations of nanoshell cylinder dimers
Metallic nanoparticles are known to exhibit strong particle size dependent localized surface plasmon resonances due to their specific optical response described via the complex dielectric function. Using...
PublikationenRoughness of silicon nanowire sidewalls and room temperature photoluminescence
Strong room temperature visible (red-orange) photoluminescence (PL) has been observed in silicon nanowires (SiNWs) that were realized by wet chemical etching of heavily (arsenic, As: 1020 cm−3) and lowly...
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