2023/11/18 by Jie Hu, Hu, Jie, Nicaise, Paul +22
Engineering · Physics and Astronomy · #Advanced Thermodynamic Systems and Engines #Calibration and Measurement Techniques #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Superconducting and THz Device Technology
paper · pdf · doi:10.48550/arxiv.2311.11121
openalex publication_date 2023/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
SpectroPhotometric Imaging in Astronomy with Kinetic Inductance Detectors (SPIAKID) aims at designing, building, and deploying on the sky a spectrophotometric imager based on microwave kinetic inductance detectors (MKIDs) in the optical and near-infrared bands. MKIDs show a fast response and the ability to resolve photon energy compared to the conventional Charge-coupled Devices (CCDs). In this paper, we present the design and simulation of the MKID arrays for SPIAKID. The detectors consist of four arrays with each array of 20,000 lumped-element pixels, and each array will be read with 10 readout lines. %The array is designed to have resonances between 4-8GHz with a frequency spacing of 2 MHz and a coupling quality factor (Qc) of about 50000. The meander material of the resonators is trilayer TiN/Ti/TiN to have better uniformity of the critical temperature across the array. We also present the measurement result for a test array with 30×30 pixels which is a subset of the designed 2000-pixel array to verify the design and fabrication. The current measured best energy resolving power R = E/ΔE is 2.4 at λ= 405~nm and the current medium R is around 1.7. We have also observed the response of the TiN/Ti/TiN is much smaller than expected.