What is it about?
This paper demonstrates that beam-assisted deposition of superconducting materials with a He-based focused ion beam (He-FIB) can be used to design and deposit superconducting nano-objects with a versatile direct write process. In particular, nanowires could be made very thin (5nm), narrow (35nm) and long (400µm), demonstrating a very high kinetic inductance, 250 times larger than the geometrical one.
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Why is it important?
High kinetic inductance superconducting materials have a growing impact in the superconducting circuits community. Operated in the microwave frequency domain, they allow to engineer high impedance circuits which have been shown to provide an efficient way to increase the lifetime of superconducting quantum bits or couple electron charge and spins to microwave photons.
Perspectives
These nanowires hold a great promise for superconducting circuits applications.
Julien Basset
COMUE Universite Paris-Saclay
Read the Original
This page is a summary of: High kinetic inductance microwave resonators made by He-Beam assisted deposition of tungsten nanowires, Applied Physics Letters, March 2019, American Institute of Physics,
DOI: 10.1063/1.5080925.
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