Mario De Lucia, Mahya Khorramshahi, Thomas Reisinger, Ioan Pop, Gerhard Ulbricht
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引用次数: 0
Abstract
Because of their versatility and scalability, Microwave Kinetic Inductance Detectors (MKIDs) represent a rapidly developing class of cryogenic superconducting detectors. In the context of optical photon detectors, the efficiency of MKIDs faces limitations due to the reflection of visible and near-infrared (VIS-NIR) photons by low resistivity metallic films, which prevents a significant portion of incident photons from being absorbed and detected. To address this issue, we propose the use of granular Aluminum (grAl), a disordered superconductor which can achieve resistivity as high as 10 m\(\Omega \cdot\)cm. We measure optical transmission and reflection of grAl thin films in the wavelength range 400 nm to 1100 nm, from which we infer their absorption. Compared to other commonly used superconductors in the MKIDs community, for grAl we observe comparable or superior absorption, depending on the wavelength and the film thickness, which makes it a promising alternative material.
期刊介绍：
Features publication of experimental and theoretical investigations in applied physics
Offers invited reviews in addition to regular papers
Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more
94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again
Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field.
In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.
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