Interplay Between Kinetic Inductance, Nonlinearity, and Quasiparticle Dynamics in Granular Aluminum Microwave Kinetic Inductance Detectors
| Autor: | Alessandro Monfardini, Gianluigi Catelani, Alexey V. Ustinov, Alain Benoit, Francesco Valenti, Nataliya Maleeva, F. Levy-Bertrand, Fabio Henriques, Patrick Winkel, J. Goupy, Lukas Grünhaupt, Martino Calvo, Uwe von Lüpke, Alexander Bilmes, Sebastian T. Skacel, Ioan Pop |
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| Přispěvatelé: | Hélium : du fondamental aux applications (HELFA), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Cryogénie (Cryo), Magnétisme et Supraconductivité (MagSup ) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
[PHYS]Physics [physics] Phonon Astrophysics::Instrumentation and Methods for Astrophysics General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Noise (electronics) Kinetic inductance Power (physics) Computational physics [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] Responsivity 0103 physical sciences Quasiparticle ddc:530 [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 010306 general physics 0210 nano-technology Microwave ComputingMilieux_MISCELLANEOUS Ground plane |
| Zdroj: | Physical Review Applied Physical Review Applied, American Physical Society, 2019, 11 (5), pp.054087. ⟨10.1103/PhysRevApplied.11.054087⟩ Physical review applied 11(5), 054087 (2019). doi:10.1103/PhysRevApplied.11.054087 |
| ISSN: | 2331-7019 |
| DOI: | 10.1103/PhysRevApplied.11.054087⟩ |
| Popis: | Microwave kinetic inductance detectors (MKIDs) are thin-film, cryogenic, superconducting resonators. Incident Cooper pair-breaking radiation increases their kinetic inductance, thereby measurably lowering their resonant frequency. For a given resonant frequency, the highest MKID responsivity is obtained by maximizing the kinetic inductance fraction α. However, in circuits with α close to unity, the low supercurrent density reduces the maximum number of readout photons before bifurcation due to self-Kerr nonlinearity, therefore setting a bound for the maximum α before the noise-equivalent power (NEP) starts to increase. By fabricating granular aluminum MKIDs with different resistivities, we effectively sweep their kinetic inductance from tens to several hundreds of pH per square. We find a NEP minimum in the range of 30aW/√Hz at α≈0.9, which results from a trade-off between the onset of nonlinearity and a nonmonotonic dependence of the noise spectral density versus resistivity. |
| Databáze: | OpenAIRE |
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