Superconducting Coplanar Waveguide Filters for Submillimeter Wave On-Chip Filterbank Spectrometers

A Endo; S J C Yates; J Bueno; D J Thoen; V Murugesan; A M Baryshev; T M Klapwijk; P P van der Werf; J J A Baselmans

doi:10.1007/s10909-016-1579-8

Superconducting Coplanar Waveguide Filters for Submillimeter Wave On-Chip Filterbank Spectrometers

J Low Temp Phys. 2016:184:412-417. doi: 10.1007/s10909-016-1579-8. Epub 2016 Mar 24.

Authors

A Endo¹, S J C Yates², J Bueno³, D J Thoen⁴, V Murugesan³, A M Baryshev⁵, T M Klapwijk⁶, P P van der Werf⁷, J J A Baselmans⁸

Affiliations

¹ Department of Microelectronics, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands ; Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.
² SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen, The Netherlands.
³ SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands.
⁴ Department of Microelectronics, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands.
⁵ SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen, The Netherlands ; Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands.
⁶ Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands ; Physics Department, Moscow State Pedagogical University, 119991 Moscow, Russia.
⁷ Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands.
⁸ Department of Microelectronics, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands ; SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands.

Abstract

We show the first experimental results which prove that superconducting NbTiN coplanar-waveguide resonators can achieve a loaded Q factor in excess of 800 in the 350 GHz band. These resonators can be used as narrow band pass filters for on-chip filter bank spectrometers for astronomy. Moreover, the low-loss coplanar waveguide technology provides an interesting alternative to microstrip lines for constructing large scale submillimeter wave electronics in general.

Keywords: Astronomical instrumentation; Filters; Microwave kinetic inductance detectors; Spectroscopy; Submillimeter wave.