Near Infrared and visible TiN- based parallel-plate capacitor kinetic inductance detectors

23 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Low Temperature Detector fabrication techniques and materials Poster session

Speaker

Samir BELDI (GEPI, Observatoire de Paris, PSL Université, CNRS, 75014 Paris – France)

Description

We report on the development of near-IR and optical parallel plate capacitor lumped-element kinetic inductance detectors (LEKIDs) for astronomical applications. The parallel-plate capacitor is made of a TiN base electrode, Al2O3 dielectric and Nb upper electrode. For a given frequency readout bandwidth, compared to the interdigitated capacitor geometry, the use of the parallel-plate capacitor allows us to significantly reduce the size of optical LEKIDs resonating at low frequencies (1-1.3 GHz) [1].The resonators which were successfully frequency multiplexed thanks to the change of the upper electrode area, exhibit internal Q-factors up to 3 × 10^6 at 72 mK. The array was illuminated using a white light and 890 nm monochromatic near infrared LEDs. In this paper, we will present the design, fabrication and experimental results.

[1] Beldi, S., Boussaha, F., Chaumont, C. et al. J Low Temp Phys (2018) 193: 184. https://doi.org/10.1007/s10909-018-2035-8.

Student (Ph.D., M.Sc. or B.Sc.) Y
Less than 5 years of experience since completion of Ph.D Y

Primary author

Samir BELDI (GEPI, Observatoire de Paris, PSL Université, CNRS, 75014 Paris – France)

Co-authors

Dr Faouzi Boussaha (GEPI, Paris Observatory) Alessandro Monfardini (CNRS Grenoble) Florence Levy-Bertrand (Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France) Dr Jie Hu (APC, University Paris Diderot) Christine Chaumont (GEPI, Observatoire de Paris, PSL Université, CNRS, 75014 Paris – France) Josiane Firminy (GEPI, Observatoire de Paris, PSL Université, CNRS, 75014 Paris – France) Dr Shan Mignot (GEPI, Observatoire de Paris, PSL Université, CNRS, 75014 Paris – France) Florent Reix (GEPI, Observatoire de Paris, PSL Université, CNRS, 75014 Paris – France) Prof. Michel Piat (APC, University Paris Diderot) Prof. Piercarlo Bonifacio (GEPI, Observatoire de Paris, PSL Université, CNRS, 75014 Paris – France) Dr Michael Rosticher (Ecole Normale Supérieure, 45 Rue d’Ulm, 75005 Paris – France)

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