Year: 2024
Type: article
Abstract: Granular Aluminum is a superconductor known for more than eighty years, which recently found its ap-plication in qubits, microwave detectors and compact resonators, due to its high kinetic inductance, critical magnetic field and critical current. Here we report on the nonlinear dependence of granular Aluminum inductance on current, which hints towards parametric amplification of the microwave signal in granular Aluminum films. The phase shift of the microwave signal reached 4 rad at a frequency of 7 GHz, which makes it possible to estimate the nonlinearity of the system as $$\Delta \phi {\text{/}}\phi = 1.4{\kern 1pt} \% $$ and the potential gain of the order of 17 dB.
Institution: National University of Science and Technology
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: G7987627267, G833201602
OpenAlex ID: W4392427341