Measuring carbon nanotube vibrations using a single-electron transistor as a fast linear amplifier

We demonstrate sensitive and fast electrical measurements of a carbon nanotube mechanical resonator. The nanotube is configured as a single-electron transistor, whose conductance is a sensitive transducer for its own displacement. Using an impedance-matching circuit followed by a cryogenic amplifier...

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Bibliographic Details
Published in:Applied physics letters 2018-10, Vol.113 (15)
Main Authors: Wen, Yutian, Ares, N., Pei, T., Briggs, G. A. D., Laird, E. A.
Format: Article
Language:English
Subjects:
Applied physics
Carbon nanotubes
Displacement measurement
Electrical measurement
Impedance matching
Linear amplifiers
Nanotubes
Resistance
Single-electron transistors
Transistors
Vibration monitoring
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Summary:We demonstrate sensitive and fast electrical measurements of a carbon nanotube mechanical resonator. The nanotube is configured as a single-electron transistor, whose conductance is a sensitive transducer for its own displacement. Using an impedance-matching circuit followed by a cryogenic amplifier, the vibrations can be monitored at radio frequency. The sensitivity of this continuous displacement measurement approaches within a factor 470 of the standard quantum limit.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5052185