Research Project on Microwave Photon Detection with Transition Edge Sensors

Investigation and fabrication of TES materials for single photon detection in the microwave range, optimizing material selection, deposition processes, and antenna-coupled TES design. Tasks include materials characterization, antenna simulations, and TES microwave characterization. The project aims to achieve milestones in TES material selection and design with microwave antennas for single photon detection.

• Research Project
• Microwave Photon Detection
• Transition Edge Sensors
• Antenna Design
• Materials Investigation

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1. SIMP: single microwave photon detection SIMP: single microwave photon detection WP3 - Transition Edge Sensors Single Photon Counter (30-100 GHz) 1. Selection of the best material as single or multi-layer with proper thicknesses and optimization of deposition process on different substrate types. 2. Design and fabrication of antenna-coupled TES by micro/nano lithographic techniques. 3. Test down to 5 mK of the antenna-coupled TES with dc-SQUID readout. Paolo Falferi - Simp Meeting - Pisa - 18/6/19 1

2. PROGRAMMA SCIENTIFICO 2019 TASK ATTUALMENTE ATTIVI Task 3.1 Materials investigation for TES (M1-M18) (INRIM, TIFPA, NEST) Fabrication and characterization of SC films to identify the best materials for TES realization with TC between 10 and 50 mK. INRIM will fabricate bilayer films of Ti/Au or Ti/Pd with TC modulated by the proximity effect of 40 50 mK; CNR-NANO NEST, building on the experience of the STAX project, will investigate Al/Cu and Ti/Cu down to 10 mK. TIFPA/FBK will fabricate, where appropriate, alternative SC films on 6 wafers. Task 3.3 Design and Fabrication of an antenna-coupled TES (M1-M24) (INRIM, NEST, INFN-Pi) Spiral or dipole antenna matched in vacuum or in waveguide will be designed and simulated (WP4). Based on these designs INFN-Pi will fabricate and test in its laboratory at room and cryogenic temperatures some antenna configurations, using a 300 mK refrigerator with quarz window and a microwave radiation source (30-100 GHz). Based on these results, INRIM and CNR-NANO NEST will fabricate some antenna-coupled TESs. In blu i punti che richiedono modifiche nel programma Altre modifiche? Paolo Falferi - Simp Meeting - Pisa - 18/6/19 2

3. PROGRAMMA SCIENTIFICO 2019 Deliverables D3.1 Selection of practical TES materials (M12) Milestones M3.1 Design of TES with microwave antenna in the 30-100 GHz band (M14) Personale Deliverable e Milestone saranno raggiungibili? Modifiche al personale partecipante? LTD 18: chi partecipa? "Single Photon Workshop 2019" Milano 21-25/10/19 Partecipiamo? (deadline abstract submission 15/7) Paolo Falferi - Simp Meeting - Pisa - 18/6/19 3

4. PROGRAMMA SCIENTIFICO 2020 Task attivi Task 3.1 Materials investigation for TES (M1-M18) Task 3.2 Design and fabrication of TESs for microwaves (M12-M24) Task 3.3 Design and Fabrication of an antenna-coupled TES (M1-M24) Task 3.4 TES microwave characterization (M18-M36) Deliverables D3.2 Fabrication of TES with Tc=40 mK (M18) D3.3 Fabrication of TES with Tc=20 mK (M24) Milestones M3.1 Design of TES with microwave antenna in the 30-100 GHz band (M14) Paolo Falferi - Simp Meeting - Pisa - 18/6/19 4

5. BUDGET 2019 Richieste Assegnazioni Task 3.1 Materials investigation for TES M1-M18 Deposition materials, cleanroom consumables, material analysis, vacuum and cryogenics spare parts TIFPA (INRIM 15k TIFPA 5k ) INFN-Pi (NEST 5k ) TIFPA 5k INFN-Pi 5k Task 3.3 Design and Fabrication of an antenna-coupled TES M1-M24 Cleanroom consumables INFN-Pi 2k Impegnare al pi presto i fondi ancora disponibili Richieste di integrazione? Paolo Falferi - Simp Meeting - Pisa - 18/6/19 5

6. BUDGET 2020 Richieste Task 3.1 Materials investigation for TES M1-M18 Deposition materials, cleanroom consumables, material analysis, vacuum and cryogenics spare parts TIFPA (INRIM 10k ) INFN-Pi (NEST 5k ) TIFPA (INRIM 5k ) Task 3.2 Design and fabrication of TESs for microwaves (M12-M24) Deposition materials, cleanroom consumables, structure analysis, cryogenic liquids Task 3.3 Design and Fabrication of an antenna-coupled TES (M1-M24) Deposition materials, cleanroom consumables, structure analysis, cryogenic liquids TIFPA (INRIM 5k ) INFN-Pi 2k Task 3.4 TES microwave characterization (M18-M36) Vacuum and cryogenics spare parts, MW components and accessories, cryogenic liquids (LN, He3/4) TIFPA (25k , INRIM 5k ) INFN-Pi (15k , NEST 10k ) Lo riproponiamo cos ? Mettiamo qualcosa sub-judice? Paolo Falferi - Simp Meeting - Pisa - 18/6/19 6

7. Fine Paolo Falferi - Simp Meeting - Pisa - 18/6/19 7

8. Le sorgenti del segnale di calibrazione indicate nel proposal Generatore esterno al criostato Sorgente a giunzione Josephson (ac J effect) Corpo nero 191 THz 1.57 m 0.79 eV Laser (usato per calibrazione miglior TES INRIM, E=0.11 eV) 100-25 THz 3-12 m 0.4-0.1 eV Quantum Cascade Laser (es. Mirsense) 10-1 THz 30-300 m 40-4 meV JJ HTc Superconductors (es. Bi2Sr2CaCu2O8 Bisko ) Frequency multipliers 2-0.2 THz 150-1500 m 8-0.8 meV 700-30 GHz 0.4-10 mm 3-0.1 meV JJ BCS Superconductors (es. Nb Tc=9K => 0.7 THz) Generatore Microonde 100-1 GHz 3-300 mm 400-4 eV Paolo Falferi - Simp Meeting - Pisa - 18/6/19 8

9. Paolo Falferi - Simp Meeting - Pisa - 18/6/19 9