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arXiv · 2311.11121

Development of MKIDs in the Optical and Near-infrared Bands for SPIAKID

Jie Hu·Paul Nicaise·Faouzi Boussaha·Jean-Marc Martin·Christine Chaumont·Alexine Marret·Florent Reix·Josiane Firminy·Thibaut Vacelet·Viet Dung Pham·Michel Piat·Elisabetta Caffau·Piercarlo Bonifacio
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Abstract

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 $30\times30$ 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.

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Jie Hu, Paul Nicaise, Faouzi Boussaha, Jean-Marc Martin, Christine Chaumont, Alexine Marret, Florent Reix, Josiane Firminy, Thibaut Vacelet, Viet Dung Pham, Michel Piat, Elisabetta Caffau, Piercarlo Bonifacio. 2023-11-18. Development of MKIDs in the Optical and Near-infrared Bands for SPIAKID. https://arxiv.org/abs/2311.11121

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