High-resistivity niobium nitride films for saturated-efficiency SMSPDs at telecom wavelengths and beyond
Philipp Zolotov, S. Svyatodukh, A. Divochiy, V. A. Seleznëv, Gregory Goltsman
Abstract
Incorporating a micrometer scale strip as the sensitive element in superconducting single-photon detectors can lead to significant improvements in their speed, footprint, and fabrication yield. However, the current application of microstrips has resulted in a decline in the detectors' intrinsic detection efficiency. We address this issue through the utilization of niobium nitride films with high values of resistance per square. Notably, the films used in our study possess an important characteristic of retaining high critical temperature values, which enables the devices to operate in conventional closed-cycle cryostats.
Topics & Concepts
Niobium nitrideNiobiumCryostatMaterials scienceOptoelectronicsNitrideFabricationElectrical resistivity and conductivityWavelengthMicrometerDetectorSuperconductivityOpticsNanotechnologyMetallurgyElectrical engineeringLayer (electronics)Condensed matter physicsPhysicsAlternative medicineEngineeringMedicinePathologyQuantum Information and CryptographyMechanical and Optical ResonatorsAtomic and Subatomic Physics Research