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- W2974130400 abstract "Kinetic inductance detectors (KIDs) have shown promising single-photon detectioncapabilities. However, there has also been a consistent deviation from the limitin energy resolution predicted by Poisson statistics. The consistent underperformancesuggests some additional mechanism has not been taken into account. Thework in this thesis has taken the novel approach of using aluminium (Al) lumpedelement (LE) KIDs to model single-photon detection based on Mattis-Bardeen andKaplan theory.This work has demonstrated generation-recombination (GR) noise limited performancepredicted by theory, when taking into account the quasiparticle densityand lifetime saturation at low temperatures. The model requires a single fittingparameter that accounts for the quasiparticle generation efficiency . This workshows = 0:4 is more appropriate for 30 nm Al lm.It has also been recognised, through simulation and measurement, that there isa position dependence in the response to photon absorption, which is dependentupon LEKID architecture. An attempt was made to mitigate this effect by using ahybrid device: an additional niobium (Nb) absorbing layer is used to cover the assumednon-responsive regions of the LEKID structure. However, large amounts ofscatter in resonator position across the test array – thought to be due to processingeffects – have made it difficult to identify between Al and hybrid devices. Experimentalprocedures were developed to assist device identification with some degreeof success but further development work is required. Nonetheless, the same testarray has shown single-photon detection in Al LEKIDs at visible and near-infraredwavelengths." @default.
- W2974130400 created "2019-09-26" @default.
- W2974130400 creator A5087105050 @default.
- W2974130400 date "2018-09-01" @default.
- W2974130400 modified "2023-09-27" @default.
- W2974130400 title "Study of the limits of single-photon detection inlumped element kineticinductance detectors" @default.
- W2974130400 hasPublicationYear "2018" @default.
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