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Your search keyword '"Van Woerkom, D. J."' showing total 3 results
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3 results on '"Van Woerkom, D. J."'

1. Microwave spectroscopy of interacting Andreev spins

Author

Wesdorp, J. J., Matute-cañadas, F. J., Vaartjes, A., Grünhaupt, L., Laeven, T., Roelofs, S., Splitthoff, L. J., Pita-vidal, M., Bargerbos, A., Van Woerkom, D. J., Krogstrup, P., Kouwenhoven, L. P., Andersen, C. K., Yeyati, A. Levy, Van Heck, B., De Lange, G., Wesdorp, J. J., Matute-cañadas, F. J., Vaartjes, A., Grünhaupt, L., Laeven, T., Roelofs, S., Splitthoff, L. J., Pita-vidal, M., Bargerbos, A., Van Woerkom, D. J., Krogstrup, P., Kouwenhoven, L. P., Andersen, C. K., Yeyati, A. Levy, Van Heck, B., and De Lange, G.

Published
2024

3. Josephson radiation and shot noise of a semiconductor nanowire junction

Author

van Woerkom, D. J., Proutski, A., Van Gulik, R.J.J., Kriváchy, T., Car, D., Plissard, S.R., Bakkers, E.P.A.M., Kouwenhoven, L.P., Geresdi, A., van Woerkom, D. J., Proutski, A., Van Gulik, R.J.J., Kriváchy, T., Car, D., Plissard, S.R., Bakkers, E.P.A.M., Kouwenhoven, L.P., and Geresdi, A.

Abstract

We measured the Josephson radiation emitted by an InSb semiconductor nanowire junction utilizing photon-assisted quasiparticle tunneling in an ac-coupled superconducting tunnel junction. We quantify the action of the local microwave environment by evaluating the frequency dependence of the inelastic Cooper-pair tunneling of the nanowire junction and find the zero-frequency impedance Z(0)=492Ω with a cutoff frequency of f0=33.1GHz. We extract a circuit coupling efficiency of η≈0.1 and a detector quantum efficiency approaching unity in the high-frequency limit. In addition to the Josephson radiation, we identify a shot noise contribution with a Fano factor F≈1, consistently with the presence of single electron states in the nanowire channel.

Published
2017

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