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Coupled nanoSQUIDs and nano-electromechanical systems (NEMS) resonators.

Hao, L; Cox, D; Gallop, J C; Chen, J*; Rozhko, S*; Blois, A*; Romans, E J* (2013) Coupled nanoSQUIDs and nano-electromechanical systems (NEMS) resonators. IEEE Trans. Appl. Supercond., 23 (3). 1800304

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Abstract

Recent developments in cryogenic nano-electromechanical (NEMS) resonators have shown that they can address some fundamental physics, for example in achieving the ground state of a mechanical resonator and entanglement with an electromagnetic resonator. In contrast, little work has been reported on using what is arguably the most sensitive measuring device, a SQUID, to directly interact with, and thus interrogate, a NEMS resonator. We report here our initial experimental results aimed towards forming an optimised coupled nano-mechanical resonator and a focussed ion beam patterned Nb SQUID, possessing exceptionally low noise (~200nF0/Hz1/2 above 1kHz), and operating above 4.2 K. We describe our first results from a paddle-shaped mechanical resonator with a diameter of 15 µm coupled to a Nb SQUID loop. Finally we describe the construction of our first true nanoscale-coupled, double-clamped cantilever and nanoSQUID (rectangular loop area 100 nm × 900 nm).

Item Type: Article
Keywords: NanoSQUID, NEMS, low noise
Subjects: Quantum Phenomena
Quantum Phenomena > Nanophysics
Identification number/DOI: 10.1109/TASC.2012.2233536
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5717

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