Investigating pump harmonics generation in a SNAIL-based traveling wave parametric amplifier
Abstract Traveling wave parametric amplifiers (TWPAs) are extensively employed in experiments involving weak microwave signals for their highly desirable quantum-limited and broadband characteristics. However, TWPAs’ broadband nature comes with the disadvantage of admitting the activation of spurious nonlinear processes, such as harmonics generation, that can potentially degrade amplification performance. Here we experimentally investigate a Josephson TWPA device with superconducting nonlinear asymmetric inductive element-based unit cells focusing on the amplification behaviour along with the generation of second and third harmonics of the pump. By comparing experimental results with transient numerical simulations, we demonstrate the influence of Josephson junctions’ fabrication imperfections on the occurrence of harmonics and on the gain behaviour.
Authors
- Nicolas Roch (ORCID: https://orcid.org/0000-0001-8177-9738)
- Martina Esposito (ORCID: https://orcid.org/0000-0002-7674-9195)
- P. Mastrovito (ORCID: https://orcid.org/0000-0002-7833-0398)
- D. Massarotti (ORCID: https://orcid.org/0000-0001-7495-362X)
- Raffaella Ferraiuolo (ORCID: https://orcid.org/0000-0002-9999-0037)
- Luca Planat (ORCID: https://orcid.org/0000-0002-0950-1405)
- Anna Levochkina (ORCID: https://orcid.org/0009-0002-2615-2507)
- Domenico Montemurro (ORCID: https://orcid.org/0000-0001-8944-0640)
- Halima Giovanna Ahmad (ORCID: https://orcid.org/0000-0003-2627-2496)
- G. Cappelli (ORCID: https://orcid.org/0000-0003-4430-9838)
- Roberta Satariano (ORCID: https://orcid.org/0000-0003-2211-6410)
- Luigi Di Palma (ORCID: https://orcid.org/0000-0002-7635-5428)
- Francesco Tafuri (ORCID: https://orcid.org/0000-0003-0784-1454)
- Guglielmina Pepe (ORCID: https://orcid.org/0000-0001-9825-6618)
- Gwenael Le Gal (ORCID: https://orcid.org/0000-0001-6630-0813)
- Pegah Darvehi (ORCID: https://orcid.org/0000-0001-6567-8574)
- Giuseppe Serpico (ORCID: https://orcid.org/0009-0000-8962-7878)
- Arpit Ranadive (ORCID: https://orcid.org/0000-0001-5668-4753)
- I. Chatterjee (ORCID: https://orcid.org/0009-0007-2249-3378)
Institutions
- Superconducting and other Innovative Materials and Devices Institute (IT)
- Institut Néel (FR)
- University of Naples Federico II (IT)
Publication Details
- Journal
- Superconductor Science and Technology
- Published
- 2024-10-03
- DOI
- https://doi.org/10.1088/1361-6668/ad8314
- Citations
- 6
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- Ministero dell'Università e della Ricerca
- H2020 European Institute of Innovation and Technology
- HORIZON EUROPE Digital, Industry and Space