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Kouwenhoven, K. (author), van Doorn, G.P.J. (author), Buijtendorp, B.T. (author), de Rooij, S.A.H. (author), Lamers, D. (author), Thoen, David (author), Murugesan, V. (author), Baselmans, J.J.A. (author), de Visser, P.J. (author)Parallel-plate capacitors (PPC) significantly reduce the size of superconducting microwave resonators, reducing the pixel pitch for arrays of single-photon energy-resolving kinetic inductance detectors (KIDs). The frequency noise of KIDs is typically limited by tunneling two-level systems (TLS), which originate from lattice defects in the...journal article 2024
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Kouwenhoven, K. (author), Fan, D. (author), Biancalani, Enrico (author), de Rooij, S.A.H. (author), Karim, A.T. (author), Smith, C.S. (author), Murugesan, Vignesh (author), Thoen, David (author), Baselmans, J.J.A. (author), de Visser, P.J. (author)Kinetic inductance detectors (KIDs) are superconducting energy-resolving detectors, sensitive to single photons from the near-infrared to ultraviolet. We study a hybrid KID design consisting of a β-phase tantalum (β-Ta) inductor and a Nb-Ti-N interdigitated capacitor. The devices show an average intrinsic quality factor Qi of 4.3×105±1.3×105....journal article 2023
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de Visser, P.J. (author), de Rooij, S.A.H. (author), Murugesan, V. (author), Thoen, David (author), Baselmans, J.J.A. (author)A noiseless, photon-counting detector, which resolves the energy of each photon, could radically change astronomy, biophysics, and quantum optics. Superconducting detectors promise an intrinsic resolving power at visible wavelengths of R=E/δE≈100 due to their low excitation energy. We study superconducting energy-resolving microwave kinetic...journal article 2021