143 citations · 1k across the 21 of their papers we have counts for
21 papers
Post-fabrication trimming of a 1024-pixel, single-photon counting, Microwave Kinetic Inductance Detector array with a pixel pitch of 150 micron
Wilbert Ras-Vinke, Hessel Schulte, David J. Thoen +5
Microwave Kinetic Inductance Detectors are superconducting resonators capable of single-photon counting with energy resolving capability at visible and near-infrared wavelengths. T…
The spectral energy distribution of YSES 1 b and its circumplanetary disc
Michiel Darcis, Sebastiaan Y. Haffert, Tomas Stolker +18
Context. Direct imaging enables the characterisation of substellar companions on wide orbits. These objects provide a testbed for our formation theories; therefore, it is important…
Geometry dependence of TLS noise and loss in a-SiC:H parallel plate capacitors for superconducting microwave resonators
K. Kouwenhoven, G. P. J. van Doorn, B. T. Buijtendorp +6
Parallel plate capacitors (PPC) significantly reduce the size of superconducting microwave resonators, reducing the pixel pitch for arrays of single photon energy-resolving kinetic…
Ultra-sensitive Super-THz Microwave Kinetic Inductance Detectors for future space telescopes
J. J. A. Baselmans, F. Facchin, A. Pascual Laguna +5
Future actively cooled space-borne observatories for the far-infrared, loosely defined as a 1--10 THz band, can potentially reach a sensitivity limited only by background radiation…
Model and Measurements of an Optical Stack for Broadband Visible to Near-IR Absorption in TiN KIDs
K. Kouwenhoven, I. Elwakil, J. van Wingerden +4
Typical materials for optical Kinetic Inductance Detetectors (KIDs) are metals with a natural absorption of 30-50% in the visible and near-infrared. To reach high absorption effici…
Phonon-trapping enhanced energy resolution in superconducting single photon detectors
Pieter J. de Visser, Steven A. H. de Rooij, Vignesh Murugesan +2
A noiseless, photon counting detector, which resolves the energy of each photon, could radically change astronomy, biophysics and quantum optics. Superconducting detectors promise…
Strong Reduction of Quasiparticle Fluctuations in a Superconductor due to Decoupling of the Quasiparticle Number and Lifetime
Steven A. H. de Rooij, Jochem J. A. Baselmans, Vignesh Murugesan +2
We measure temperature dependent quasiparticle fluctuations in a small Al volume, embedded in a NbTiN superconducting microwave resonator. The resonator design allows for read-out…
Direct evidence for Cooper pairing without a spectral gap in a disordered superconductor above
Koen M. Bastiaans, Damianos Chatzopoulos, Jian-Feng Ge +9
The idea that preformed Cooper pairs could exist in a superconductor above its zero-resistance state has been explored for unconventional, interface, and disordered superconductors…
Wideband on-chip terahertz spectrometer based on a superconducting filterbank
Akira Endo, Kenichi Karatsu, Alejandro Pascual Laguna +16
Terahertz spectrometers with a wide instantaneous frequency coverage for passive remote sensing are enormously attractive for many terahertz applications, such as astronomy, atmosp…
Suppressed magnetic circular dichroism and valley-selective magneto-absorption due to the effective mass anisotropy in bismuth
Pieter J. de Visser, Julien Levallois, Michaël K. Tran +6
We have measured the far-infrared reflectivity and Kerr angle spectra on a high-quality crystal of pure semimetallic bismuth as a function of magnetic field, from which we extract…
Coherent excited states in superconductors due to a microwave field
A. V. Semenov, I. A. Devyatov, P. J. de Visser +1
We describe theoretically the depairing effect of a microwave field on diffusive s-wave superconductors. The ground state of the superconductor is altered qualitatively in analogy…
Anomalous response of superconducting titanium nitride resonators to terahertz radiation
J. Bueno, P. C. J. J. Coumou, G. Zheng +5
We present an experimental study of KIDs fabricated of atomic layer deposited TiN films, and characterized at radiation frequencies of ~GHz. The responsivity to radiation is m…
Equivalence of Optical and Electrical Noise Equivalent Power of Hybrid NbTiN-Al Microwave Kinetic Inductance Detectors
R. M. J. Janssen, A. Endo, P. J. de Visser +2
We have measured and compared the response of hybrid NbTiN-Al Microwave Kinetic Inductance Detectors (MKIDs) to changes in bath temperature and illumination by sub-mm radiation. We…
Fluctuations in the electron system of a superconductor exposed to a photon flux
P. J. de Visser, J. J. A. Baselmans, J. Bueno +2
We report on fluctuations in the electron system, Cooper pairs and quasiparticles, of a superconducting aluminium film. The superconductor is exposed to pair-breaking photons (1.54…
Evidence of a nonequilibrium distribution of quasiparticles in the microwave response of a superconducting aluminium resonator
P. J. de Visser, D. J. Goldie, P. Diener +3
In a superconductor absorption of photons with an energy below the superconducting gap leads to redistribution of quasiparticles over energy and thus induces a strong non-equilibri…
Power Handling and Responsivity of Submicron Wide Superconducting Coplanar Waveguide Resonators
R. M. J. Janssen, A. Endo, J. J. A. Baselmans +3
The sensitivity of microwave kinetic inductance detectors (MKIDs) based on coplanar waveguides (CPWs) needs to be improved by at least an order of magnitude to satisfy the requirem…
Strongly disordered TiN and NbTiN s-wave superconductors probed by microwave electrodynamics
E. F. C. Driessen, P. C. J. J. Coumou, R. R. Tromp +2
We probe the effects of strong disorder (2.4 < kFl < 8.6) on superconductivity in thin films of niobium titanium nitride and titanium nitride by measuring the microwave electrodyna…
Microwave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations
P. J. de Visser, J. J. A. Baselmans, S. J. C. Yates +3
We have measured the number of quasiparticles and their lifetime in aluminium superconducting microwave resonators. The number of excess quasiparticles below 160 mK decreases from…
Integrated Filterbank for DESHIMA: A Submillimeter Imaging Spectrograph Based on Superconducting Resonators
A. Endo, P. van der Werf, R. M. J. Janssen +6
An integrated filterbank (IFB) in combination with microwave kinetic inductance detectors (MKIDs), both based on superconducting resonators, could be used to make broadband submill…
Reduced frequency noise in superconducting resonators
R. Barends, N. Vercruyssen, A. Endo +4
We report a reduction of the frequency noise in coplanar waveguide superconducting resonators. The reduction of 7 dB is achieved by removing the exposed dielectric substrate surfac…
Minimal resonator loss for circuit quantum electrodynamics
R. Barends, N. Vercruyssen, A. Endo +6
Single photon level quality factors of 500x10^3 are shown in NbTiN superconducting resonators at millikelvin temperatures. This result originates from the intrinsic low dielectric…