Fluctuation Mechanisms in Superconductors

Holger Bartolf discusses state-of-the-art detection concepts based on superconducting nanotechnology as well as sophisticated analytical formulæ that model dissipative fluctuation-phenomena in superconducting nanowire single-photon detectors. Such knowledge is desirable for the development of advanced devices which are designed to possess an intrinsic robustness against vortex-fluctuations and it provides the perspective for honorable fundamental science in condensed matter physics. Especially the nanowire detector allows for ultra-low noise detection of signals with single-photon sensitivity and GHz repetition rates. Such devices have a huge potential for future technological impact and might enable unique applications ( e.g. high rate interplanetary deep-space data links from Mars to Earth).

Superconducting cryogenic single-photon detectors are explained including analytical models of the detection mechanism and the historical development of low-temperature superconductivity is debated by numerous ( The mathematical formalism ( A unique and novel approach on how to manufacture high-quality nanoscaled devices which measure only a few hundreds of atoms Includes supplementary material: sn.pub/extras

Auteur

Holger Bartolf studied Solid State Physics at the Universities of Karlsruhe and Zürich. In 2011 he relocated at the Swiss Corporate Research Center of a leading company in power and automation technologies where his current interests focus on the applied R&D of the next generation of power semiconductors.

Contenu
Preface - Vortex-Fluctuation and Single-Photon Detection.- Introduction.- Part I: Nanoscale Manufacturing Developments.- Considerations for Nanoscale Manufacturing.- Superconducting Thin-Film Preparation.- Nanoscale-Precise Coordinate System: Scalable, GDSII-Design.- Thin-Film Structuring.- Device Manufacturing.- Proof of Principle of the Above Described Approach.- Part II: Nanoscaled Superconductivity and its Application in Single-Photon Detectors.- Motivation for Part II.- Metallic and Superconducting States.- Fluctuation Mechanisms in Superconductors.- Static Electronic Transport Measurements.- Theoretical Models of Current-Induced Fluctuations.- Time-Resolved Photon- and Fluctuation Detection.- Concluding Remarks and Recent Nanowire Developments.