TY - GEN
T1 - Tailoring Superconducting Nanowire Single-Photon Detectors for Quantum Technologies
AU - Zugliani, Lucio
AU - Schmid, Christian
AU - Wietschorke, Fabian
AU - Jonas, Björn
AU - Spedicato, Simone
AU - Strohauer, Stefan
AU - Grotowski, Stefanie
AU - Flaschmann, Rasmus
AU - Müller, Manuel
AU - Althammer, Matthias
AU - Gross, Rudolf
AU - Finley, Jonathan
AU - Müller, Kai
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Superconducting nanowire single-photon detectors (SNSPDs) are a key building block for photonic quantum technologies, as they provide a means for efficient readout of optical circuits with low timing jitter, dark counts and dead time. In this contribution we give a general overview of the working principle of these devices and look into several engineering aspects. We discuss the influence of the stoichiometry of NbTiN thin-films on detector performance and find that a ratio of 65:35 Nb:Ti results in the highest saturation of SNSPDs fabricated from these films. Furthermore, we study the impact of helium ion irradiation on the efficiency of SNSPDs. We show that with this technique the efficiency of an SNSPD can be improved from below 1% to 42%. Finally, we discuss the impact of embedding the SNSPDs into an optical cavity on the system detection efficiency. By employing a half-cavity under the detector we are able to boost the efficiency from 30% to 50% for a detector with a fill factor of 0.33.
AB - Superconducting nanowire single-photon detectors (SNSPDs) are a key building block for photonic quantum technologies, as they provide a means for efficient readout of optical circuits with low timing jitter, dark counts and dead time. In this contribution we give a general overview of the working principle of these devices and look into several engineering aspects. We discuss the influence of the stoichiometry of NbTiN thin-films on detector performance and find that a ratio of 65:35 Nb:Ti results in the highest saturation of SNSPDs fabricated from these films. Furthermore, we study the impact of helium ion irradiation on the efficiency of SNSPDs. We show that with this technique the efficiency of an SNSPD can be improved from below 1% to 42%. Finally, we discuss the impact of embedding the SNSPDs into an optical cavity on the system detection efficiency. By employing a half-cavity under the detector we are able to boost the efficiency from 30% to 50% for a detector with a fill factor of 0.33.
UR - http://www.scopus.com/inward/record.url?scp=85190309524&partnerID=8YFLogxK
U2 - 10.1109/GCWkshps58843.2023.10465075
DO - 10.1109/GCWkshps58843.2023.10465075
M3 - Conference contribution
AN - SCOPUS:85190309524
T3 - 2023 IEEE Globecom Workshops, GC Wkshps 2023
SP - 1051
EP - 1056
BT - 2023 IEEE Globecom Workshops, GC Wkshps 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE Globecom Workshops, GC Wkshps 2023
Y2 - 4 December 2023 through 8 December 2023
ER -