1. |
- Ferrari, Raffaele, et al.
(författare)
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Frontotemporal dementia and its subtypes: a genome-wide association study.
- 2014
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Ingår i: Lancet Neurology. - 1474-4465. ; 13:7, s. 686-699
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Tidskriftsartikel (refereegranskat)abstract
- Frontotemporal dementia (FTD) is a complex disorder characterised by a broad range of clinical manifestations, differential pathological signatures, and genetic variability. Mutations in three genes-MAPT, GRN, and C9orf72-have been associated with FTD. We sought to identify novel genetic risk loci associated with the disorder.
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2. |
- Hummel, Thomas, et al.
(författare)
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Gated- and optical biasing for SNSPDs
- 2023
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Ingår i: Frontiers in Optics: Proceedings Frontiers in Optics + Laser Science 2023, FiO, LS 2023. - : Optica Publishing Group.
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Konferensbidrag (refereegranskat)abstract
- SNSPDs are usually limited to constant current bias operation due to the required room temperature auxiliary electronics. We show gated mode operation and low power biasing of SNSPDs with cryogenic integrated current sources.
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3. |
- Hummel, Thomas, et al.
(författare)
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Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry
- 2023
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Ingår i: Optics Express. - : Optica Publishing Group. - 1094-4087. ; 31:1, s. 610-625
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Tidskriftsartikel (refereegranskat)abstract
- Superconducting nanowire single-photon detectors (SNSPDs) show near unity efficiency, low dark count rate, and short recovery time. Combining these characteristics with temporal control of SNSPDs broadens their applications as in active de-latching for higher dynamic range counting or temporal filtering for pump-probe spectroscopy or LiDAR. To that end, we demonstrate active gating of an SNSPD with a minimum off-to-on rise time of 2.4 ns and a total gate length of 5.0 ns. We show how the rise time depends on the inductance of the detector in combination with the control electronics. The gate window is demonstrated to be fully and freely, electrically tunable up to 500 ns at a repetition rate of 1.0 MHz, as well as ungated, free-running operation. Control electronics to generate the gating are mounted on the 2.3K stage of a closed-cycle sorption cryostat, while the detector is operated on the cold stage at 0.8 K. We show that the efficiency and timing jitter of the detector is not altered during the on-time of the gating window. We exploit gated operation to demonstrate a method to increase in the photon counting dynamic range by a factor 11.2, as well as temporal filtering of a strong pump in an emulated pump-probe experiment.
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