Sub-mm-Wave Superconducting On-Chip Filter Bank for Astronomy
A. Pascual Pascual Laguna (SRON–Netherlands Institute for Space Research, TU Delft - Tera-Hertz Sensing)
Kenichi Karatsu (SRON–Netherlands Institute for Space Research, TU Delft - Tera-Hertz Sensing)
David J. Thoen (TU Delft - Tera-Hertz Sensing, TU Delft - QN/van der Zant Lab)
Vignesh Murugesan (SRON–Netherlands Institute for Space Research)
Akira Endo (TU Delft - QN/Quantum Nanoscience, TU Delft - Tera-Hertz Sensing)
J. Baselmans (SRON–Netherlands Institute for Space Research, TU Delft - Tera-Hertz Sensing)
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Abstract
A superconducting on-chip microstrip filter bank spectrometer prototype for Far-Infrared (FIR) Astronomy is presented. The measurements showcase its capabilities towards moderate spectral resolution (f/\Delta f\sim 500) broadband FIR spectroscopy. In this sub-mm-wave filter bank, each spectral channel consists of an 'I-shaped' microstrip THz bandpass filter that couples the radiation to a Microwave Kinetic Inductance Detector (MKID) for a background limited detection and a scalable frequency-multiplexed microwave readout.