207 citations · 1.6k across the 47 of their papers we have counts for
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Enhancing the Performance of Superconducting Nanowire-Based Detectors with High-Filling Factor by Using Variable Thickness
Reza Baghdadi, Ekkehart Schmidt, Saman Jahani +9
Current crowding at bends of superconducting nanowire single-photon detectors is one of the main factors limiting the performance of meander-style detectors with large filling fact…
Local thermal fluctuations in current-carrying superconducting nanowires
Alexej D. Semenov, Mariia Sidorova, Mikhail A. Skvortsov +3
We analyze the effect of different types of fluctuations in internal electron energy on the rates of dark and photon counts in straight current-carrying superconducting nanowires.…
Electron energy relaxation in disordered superconducting NbN films
Mariia Sidorova, Alexej Semenov, Heinz-Wilhelm Hübers +8
We report on the inelastic-scattering rate of electrons on phonons and relaxation of electron energy studied by means of magnetoconductance, and photoresponse, respectively, in a s…
Spectroscopic evidence for strong correlations between local superconducting gap and local Altshuler-Aronov density-of-states suppression in ultrathin NbN films
C. Carbillet, V. Cherkez, M. A. Skvortsov +10
Disorder has different profound effects on superconducting thin films. For a large variety of materials, increasing disorder reduces electronic screening which enhances electron-el…
Magnetic-field enhancement of performance of superconducting nanowire single-photon detector
Ilya Charaev, Alexei Semenov, Konstantin Ilin +1
We present SNSPDs from NbN nanowires shaped after square-spiral that allows an increase not only in critical currents but also an extension of spectral detection efficiencies by ju…
Physical mechanisms of timing jitter in photon detection by current carrying superconducting nanowires
Mariia Sidorova, Alexej Semenov, Heinz-Wilhelm Hubers +4
We studied timing jitter in the appearance of photon counts in meandering nanowires with different fractional amount of bends. Timing jitter, which is the probability density of th…
Superconducting fluctuations in a thin NbN film probed by the Hall effect
Daniel Destraz, Konstantin Ilin, Michael Siegel +2
We present a comprehensive study of how superconducting fluctuations in the normal state contribute to the conductivity tensor in a thin (119 ) film of NbN. It is shown how thes…
NbN/AlN/NbN Josephson junctions on sapphire for receiver applications
M. Merker, C. Bohn, M. Völlinger +2
The most developed integrated receivers for THz radiation nowadays are based on Josephson junction SIS devices. In this kind of devices, the highest receivable frequency is determi…
AlN-buffered superconducting NbN nanowire single-photon detector on GaAs
E. Schmidt, K. Ilin, M. Siegel
We investigated the suitability of AlN as a buffer layer for NbN superconducting nanowire single-photon detectors (SNSPDs) on GaAs. The NbN films with a thickness of 3.3 nm to 20 n…
Confinement of superconducting fluctuations due to emergent electronic inhomogeneities
C. Carbillet, S. Caprara, M. Grilli +11
The microscopic nature of an insulating state in the vicinity of a superconducting state, in the presence of disorder, is a hotly debated question. While the simplest scenario prop…
Probing the TLS Density of States in SiO Films using Superconducting Lumped Element Resonators
S. T. Skacel, Ch. Kaiser, S. Wuensch +6
We have investigated dielectric losses in amorphous SiO thin films under operating conditions of superconducting qubits (mK temperatures and low microwave powers). For this purpose…
Robustness of the Berezinskii-Kosterlitz-Thouless Transition in Ultrathin NbN Films near the Superconductor-Insulator Transition
Jie Yong, T. Lemberger, L. Benfatto +2
Occurrence of the Berezinskii-Kosterlitz-Thouless (BKT) transition is investigated by superfluid density measurements for two-dimensional (2D) disordered NbN films with disorder le…
Electrodynamics of the Superconducting State in Ultra-Thin Films at THz Frequencies
Uwe S. Pracht, Eric Heintze, Conrad Clauss +11
We report on terahertz frequency-domain spectroscopy (THz-FDS) experiments in which we measure charge carrier dynamics and excitations of thin-film superconducting systems at low t…
Highly responsive Y-Ba-Cu-O thin film THz detectors with picosecond time resolution
P. Thoma, J. Raasch, A. Scheuring +11
High-temperature superconducting YBa2Cu3O7-d (YBCO) thin-film detectors with improved responsivities were developed for fast time-domain measurements in the THz frequency range. YB…
Detection Efficiency of a Spiral-Nanowire Superconducting Single-Photon Detector
D. Henrich, L. Rehm, S. Dörner +4
We investigate the detection efficiency of a spiral layout of a Superconducting Nanowire Single-Photon Detector (SNSPD). The design is less susceptible to the critical current redu…
Sub-μm Josephson Junctions for Superconducting Quantum Devices
J. M. Meckbach, M. Merker, S. J. Buehler +7
For high-performance superconducting quantum devices based on Josephson junctions (JJs) decreasing lateral sizes is of great importance. Fabrication of sub-μm JJs is challenging du…
Magnetic-field dependence of count rates in superconducting thin-film TaN single-photon detectors
A. Engel, A. Schilling, K. Il'in +1
We have studied the magnetic-field dependence of both dark-count rates and photon-count rates in a superconducting nanowire single-photon detector made of TaN in external magnetic…
Magnetic hysteresis effects in superconducting coplanar microwave resonators
Daniel Bothner, Tobias Gaber, Matthias Kemmler +4
We performed transmission spectroscopy experiments on coplanar half wavelength niobium resonators at a temperature T=4.2 K. We observe not only a strong dependence of the quality f…
Tantalum nitride superconducting single-photon detectors with low cut-off energy
Andreas Engel, Adrian Aeschbacher, Kevin Inderbitzin +6
Materials with a small superconducting energy gap are expected to favor a high detection efficiency of low-energy photons in superconducting nanowire single-photon detectors. We de…
Quantum Phase Dynamics in an LC shunted Josephson Junction
Christoph Kaiser, Thilo Bauch, Floriana Lombardi +1
We have studied both theoretically and experimentally how an LC series circuit connected in parallel to a Josephson junction influences the Josephson dynamics. The presence of the…
Thermal escape of fractional vortices in long Josephson junctions
U. Kienzle, T. Gaber, K. Buckenmaier +5
We consider a fractional Josephson vortex in a long 0-kappa Josephson junction. A uniformly applied bias current exerts a Lorentz force on the vortex. If the bias current exceeds t…
Multiple 0 - pi transitions in SIFS Josephson tunnel junctions
F. Born, M. Siegel, E. K. Hollmann +4
We report on experimental studies of superconducting coupling through a thin Ni76Al24 film. A new patterning process has been developed, which allows in combination with the wedge…
High efficiency deterministic Josephson Vortex Ratchet
M. Beck, E. Goldobin, M. Neuhaus +3
We investigate experimentally a Josephson vortex ratchet -- a fluxon in an asymmetric periodic potential driven by a deterministic force with zero time average. The highly asymmetr…
Non-ideal artificial phase discontinuity in long Josephson 0-kappa-junctions
T. Gaber, E. Goldobin, A. Sterck +4
We investigate the creation of an arbitrary -discontinuity of the Josephson phase in a long Nb-AlO_x-Nb Josephson junction (LJJ) using a pair of tiny current injectors, and stud…