Suppression of radiation loss in high kinetic inductance superconducting co-planar waveguides

S. Hahnle; N. v. Marrewijk; A. Endo; K. Karatsu; D. J. Thoen; Vignesh Murugesan; J. J. A. Baselmans

doi:10.1063/5.0005047

Suppression of radiation loss in high kinetic inductance superconducting co-planar waveguides

S. Hahnle, N. v. Marrewijk, A. Endo, K. Karatsu, D. J. Thoen, Vignesh Murugesan, J. J. A. Baselmans

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Abstract

We present a lab-on-chip technique to measure the very low losses in superconducting transmission lines at (sub-) mm wavelengths. The chips consist of a 100 nm-thick NbTiN Co-planar Waveguide (CPW) Fabry–Pérot (FP) resonator, coupled, on one side, to an antenna and, on the other side, to a Microwave Kinetic Inductance detector. Using a single frequency radiation source allows us to measure the frequency response of the FP around 350 GHz and deduce its losses. We show that the loss is dominated by radiation loss inside the CPW line that forms the FP and that it decreases with the decreasing linewidth and increasing kinetic inductance as expected. The results can be quantitatively understood using SONNET simulations. The lowest loss is observed for a CPW with a total width of 6 μm and corresponds to a Q-factor of ≈15 000.

Original language	English
Number of pages	6
Journal	Applied Physics Letters
Volume	116
Issue number	18
DOIs	https://doi.org/10.1063/5.0005047
Publication status	Published - 2020

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Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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title = "Suppression of radiation loss in high kinetic inductance superconducting co-planar waveguides",

abstract = "We present a lab-on-chip technique to measure the very low losses in superconducting transmission lines at (sub-) mm wavelengths. The chips consist of a 100 nm-thick NbTiN Co-planar Waveguide (CPW) Fabry–P{\'e}rot (FP) resonator, coupled, on one side, to an antenna and, on the other side, to a Microwave Kinetic Inductance detector. Using a single frequency radiation source allows us to measure the frequency response of the FP around 350 GHz and deduce its losses. We show that the loss is dominated by radiation loss inside the CPW line that forms the FP and that it decreases with the decreasing linewidth and increasing kinetic inductance as expected. The results can be quantitatively understood using SONNET simulations. The lowest loss is observed for a CPW with a total width of 6 μm and corresponds to a Q-factor of ≈15 000.",

author = "S. Hahnle and {v. Marrewijk}, N. and A. Endo and K. Karatsu and Thoen, {D. J.} and Vignesh Murugesan and Baselmans, {J. J. A.}",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

year = "2020",

doi = "10.1063/5.0005047",

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volume = "116",

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TY - JOUR

T1 - Suppression of radiation loss in high kinetic inductance superconducting co-planar waveguides

AU - Hahnle, S.

AU - v. Marrewijk, N.

AU - Endo, A.

AU - Karatsu, K.

AU - Thoen, D. J.

AU - Murugesan, Vignesh

AU - Baselmans, J. J. A.

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2020

Y1 - 2020

N2 - We present a lab-on-chip technique to measure the very low losses in superconducting transmission lines at (sub-) mm wavelengths. The chips consist of a 100 nm-thick NbTiN Co-planar Waveguide (CPW) Fabry–Pérot (FP) resonator, coupled, on one side, to an antenna and, on the other side, to a Microwave Kinetic Inductance detector. Using a single frequency radiation source allows us to measure the frequency response of the FP around 350 GHz and deduce its losses. We show that the loss is dominated by radiation loss inside the CPW line that forms the FP and that it decreases with the decreasing linewidth and increasing kinetic inductance as expected. The results can be quantitatively understood using SONNET simulations. The lowest loss is observed for a CPW with a total width of 6 μm and corresponds to a Q-factor of ≈15 000.

AB - We present a lab-on-chip technique to measure the very low losses in superconducting transmission lines at (sub-) mm wavelengths. The chips consist of a 100 nm-thick NbTiN Co-planar Waveguide (CPW) Fabry–Pérot (FP) resonator, coupled, on one side, to an antenna and, on the other side, to a Microwave Kinetic Inductance detector. Using a single frequency radiation source allows us to measure the frequency response of the FP around 350 GHz and deduce its losses. We show that the loss is dominated by radiation loss inside the CPW line that forms the FP and that it decreases with the decreasing linewidth and increasing kinetic inductance as expected. The results can be quantitatively understood using SONNET simulations. The lowest loss is observed for a CPW with a total width of 6 μm and corresponds to a Q-factor of ≈15 000.

U2 - 10.1063/5.0005047

DO - 10.1063/5.0005047

M3 - Article

SN - 0003-6951

VL - 116

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 18

ER -

Suppression of radiation loss in high kinetic inductance superconducting co-planar waveguides

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