Development of Al-Nb Hybrid Lumped-Element Kinetic Inductance Detectors for Infrared Photon Detection
Abstract
A direct detection experiment with gallium arsenide (GaAs) as a cryogenic scintillator is proposed to search for dark matter in the mass range below 1 GeV . To detect scintillation photons with high sensitivity, we are developing Lumped Element Kinetic Inductance Detectors (LE-KIDs). We report the first fabrication of the aluminum-niobium LE-KIDs and measurements of their basic properties. We designed LE-KIDs by conducting electro-magnetic simulations, and fabricated them via photolithography. We evaluated the fabricated LE-KIDs at 100 mK and detected 36 resonances out of 39 designed resonances. The resonance frequencies are roughly located at the target locations to an accuracy of 0.1 GHz , and the simulation effectively reproduced the temperature dependence of the resonance frequency. We demonstrated an optical measurement of the LE-KIDs by using an LED with wavelength that matches that of the scintillation photon from GaAs, which can operate at 100 mK.
- Publication:
-
Journal of Low Temperature Physics
- Pub Date:
- November 2022
- DOI:
- 10.1007/s10909-022-02745-5
- Bibcode:
- 2022JLTP..209..441T
- Keywords:
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- Kinetic Inductance Detectors (KIDs);
- Superconducting detector;
- Infrared photon detector;
- Dark matter