Development of TiN-Based Suspended Meander Kinetic Inductance Detectors (KIDs) for Visible and Near-Infrared Astronomy Applications

Abstract

We propose high-Q factors sub-stoichiometric TiN-based Lumped Element MKIDs on sapphire with vacuum gap suspended meander. The aim is to improve detector response by trapping phonons within the meander to increase the number of Cooper pairs breaking into quasiparticles. Furthermore, either Nb/Au or Nb/Al reflective thin bilayer can be placed beneath \textcolor{black}{the meander} to respectively improve the photon peak absorption at the near-infrared and visible wavelengths.