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Article Dans Une Revue Journal of Low Temperature Physics Année : 2022

Investigation of Optical Coupling in Microwave Kinetic Inductance Detectors using Superconducting Reflective Plates

Résumé

To improve the optical coupling in Microwave Kinetic Inductance Detectors (MKIDs), we investigate the use of a reflective plate beneath the meandered absorber. We designed, fabricated and characterized high-Q factors TiN-based MKIDs on sapphire operating at optical wavelengths with a Au/Nb reflective thin bilayer below the meander. The reflector is set at a quarter-wave distance from the meander using a transparent Al 2 O 3 dielectric layer to reach the peak photon absorption. We expect the plate to recover undetected photons by reflecting them back onto the absorber.
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Dates et versions

hal-03714351 , version 1 (05-07-2022)

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Paul Nicaise, Jie Hu, Jean-Marc Martin, Samir Beldi, Christine Chaumont, et al.. Investigation of Optical Coupling in Microwave Kinetic Inductance Detectors using Superconducting Reflective Plates. Journal of Low Temperature Physics, 2022, 209 (5-6), pp.1242-1248. ⟨10.1007/s10909-022-02789-7⟩. ⟨hal-03714351⟩
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