Exploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation results
Travelling Wave Parametric Amplifiers (TWPAs) can potentially achieve quantum limited noise over a broad bandwidth in the microwave regime, with potential applications in the readout of millimetre (mm) and sub-millimetre (sub-mm) receivers to further improve the system sensitivity, among many other...
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| Format: | Conference item |
| Sprache: | English |
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International Symposium on Space Terahertz Technology
2024
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| _version_ | 1826315207880736768 |
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| author | Navarro Montilla, J Driessen, EFC Barbier, A Boussaha, F Chaumont, C Tan, B-K |
| author_facet | Navarro Montilla, J Driessen, EFC Barbier, A Boussaha, F Chaumont, C Tan, B-K |
| author_sort | Navarro Montilla, J |
| collection | OXFORD |
| description | Travelling Wave Parametric Amplifiers (TWPAs) can potentially achieve quantum limited noise over a broad bandwidth in the microwave regime, with potential applications in the readout of millimetre (mm) and sub-millimetre (sub-mm) receivers to further improve the system sensitivity, among many other applications. TWPAs using embedded Josephson junctions (J-TWPA) have proven to exhibit noise performance approaching the quantum limit, however its compression point (P–1dB ~ –100 dBm) is too low for reading out mm and sub-mm astronomical receivers. Therefore, we explored the design of higher dynamic range JTWPAs to match the power requirements, and to optimise the performances of the JTWPA for this specific application. Our aim is to adapt the well-established Nb-AlOx-Nb tri-layer fabrication technique used routinely for developing high-quality Superconductor-Insulator-Superconductor (SIS) tunnel junctions to fabricate our JTWPA. Therefore, we present in this paper our investigation of the feasibility of such technique in fabricating large number of lower critical current density junctions embedded in a coplanar waveguide (CPW). The preliminary results on a 500-junctions device are in line with the expected behaviour, showing a measured gain consistent with theoretical calculations which demonstrates the potential use of the tri-layer tunnel junction technology for the fabrication of JTWPAs. |
| first_indexed | 2024-03-07T08:09:08Z |
| format | Conference item |
| id | oxford-uuid:234a4f9d-624b-48ef-b74c-f8d5ec9ec51f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-12-09T03:21:47Z |
| publishDate | 2024 |
| publisher | International Symposium on Space Terahertz Technology |
| record_format | dspace |
| spelling | oxford-uuid:234a4f9d-624b-48ef-b74c-f8d5ec9ec51f2024-11-19T10:57:04ZExploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation resultsConference itemhttp://purl.org/coar/resource_type/c_5794uuid:234a4f9d-624b-48ef-b74c-f8d5ec9ec51fEnglishSymplectic ElementsInternational Symposium on Space Terahertz Technology2024Navarro Montilla, JDriessen, EFCBarbier, ABoussaha, FChaumont, CTan, B-KTravelling Wave Parametric Amplifiers (TWPAs) can potentially achieve quantum limited noise over a broad bandwidth in the microwave regime, with potential applications in the readout of millimetre (mm) and sub-millimetre (sub-mm) receivers to further improve the system sensitivity, among many other applications. TWPAs using embedded Josephson junctions (J-TWPA) have proven to exhibit noise performance approaching the quantum limit, however its compression point (P–1dB ~ –100 dBm) is too low for reading out mm and sub-mm astronomical receivers. Therefore, we explored the design of higher dynamic range JTWPAs to match the power requirements, and to optimise the performances of the JTWPA for this specific application. Our aim is to adapt the well-established Nb-AlOx-Nb tri-layer fabrication technique used routinely for developing high-quality Superconductor-Insulator-Superconductor (SIS) tunnel junctions to fabricate our JTWPA. Therefore, we present in this paper our investigation of the feasibility of such technique in fabricating large number of lower critical current density junctions embedded in a coplanar waveguide (CPW). The preliminary results on a 500-junctions device are in line with the expected behaviour, showing a measured gain consistent with theoretical calculations which demonstrates the potential use of the tri-layer tunnel junction technology for the fabrication of JTWPAs. |
| spellingShingle | Navarro Montilla, J Driessen, EFC Barbier, A Boussaha, F Chaumont, C Tan, B-K Exploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation results |
| title | Exploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation results |
| title_full | Exploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation results |
| title_fullStr | Exploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation results |
| title_full_unstemmed | Exploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation results |
| title_short | Exploring the limits of the tunnel junction fabrication technique for Josephson junctions TWPA and the preliminary characterisation results |
| title_sort | exploring the limits of the tunnel junction fabrication technique for josephson junctions twpa and the preliminary characterisation results |
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