Speaker
Mr
Tomas Polakovic
(Argonne National Lab & Drexel University)
Description
Superconducting nanowire single photon detectors (SNSPD) have found applications in many fields, including nanophotonics, quantum communication and computing. They feature near-unity quantum efficiency, picosecond timing jitter and GHz count rates, which makes them promising candidates for future nuclear and high energy physics applications.
Towards the goal of implementing this technology in conditions common in nuclear physics experiments, we study the performance of SNSPDs in high magnetic fields by implementing superconducting type-II materials with high upper critical fields and critical currents. Using the recently developed ion-beam assisted sputtering method, we fabricate Niobium Nitride SNSPDs on non-epitaxial substrates using a two-step process, and perform optoelectronic characterization across a wide range of magnetic fields. We demonstrate performance with zero dark counts and saturated internal quantum efficiency in fields of up to 8 T for visible wavelength photons with no need for changes to the common meander geometry.
Primary author
Mr
Tomas Polakovic
(Argonne National Lab & Drexel University)
Co-authors
Prof.
Goran Karapetrov
(Drexel University)
Dr
John Pearson
(Argonne National Lab)
Dr
Kawtar Hafidi
(Argonne National Lab)
Dr
Valentine Novosad
(Argonne National Lab)
Dr
Volodymyr Yefremenko
(Argonne National Lab)
Dr
Whitney Armstrong
(Argonne National Lab)
Prof.
Zein-Eddine Meziani
(Argonne National Lab)
