We have fabricated an array of subgap kinetic inductance detectors (SKIDs) made granular aluminum (${T}_{c}\ensuremath{\sim}2$ K) sensitive in the 80--90 GHz frequency band and operating at 300 mK. measure a noise equivalent power $1.3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}16}\phantom{\rule{0.2em}{0ex}}{\mathrm{W}/\mathrm{Hz}}^{0.5}$ on average $2.6\ifmmode\times\else\texttimes\f...

A microwave kinetic inductance detector (MKID) is a cutting-edge superconducting detector. It comprises resonator circuit constructed with film on dielectric substrate. To expand its field of application, it important to establish method suppress the two-level system (TLS) noise that caused by electric fluctuations between two energy states at surface The density can be decreased expanding stri...

We develop a simple coordinate transformation that can be employed to compensate for the nonlinearity introduced by microwave kinetic inductance detector’s (MKID) homodyne readout scheme. This system is compared canonically used polar coordinates and shown improve performance of filtering method often estimate photon’s energy. For detector where primarily responsible limiting its resolving powe...

We are pursuing the development of a phononand ionization-mediated WIMP dark matter detector employing microwave kinetic inductance detectors (MKIDs) in the phonon-sensing channel. Prospective advantages over existing detectors include: improved reconstruction of the phonon signal and event position; simplified readout wiring and cold electronics; and simplified and more reliable fabrication. W...