Title:
|
Ultrasensitive Displacement Noise Measurement of Carbon Nanotube Mechanical Resonators
|
Author:
|
Bonis, S. L. de; Urgell, C.; Yang, W.; Samanta, C.; Noury, A.; Vergara-Cruz, J.; Dong, Q.; Jin, Y.; Bachtold, A.
|
Abstract:
|
Mechanical resonators based on a single
carbon nanotube are exceptional sensors of mass and force.
The force sensitivity in these ultralight resonators is often
limited by the noise in the detection of the vibrations. Here,
we report on an ultrasensitive scheme based on a RLC
resonator and a low-temperature amplifier to detect nanotube
vibrations. We also show a new fabrication process of
electromechanical nanotube resonators to reduce the separation between the suspended nanotube and the gate electrode
down to ∼150 nm. These advances in detection and fabrication allow us to reach 0.5pm/ Hz displacement sensitivity.
Thermal vibrations cooled cryogenically at 300 mK are detected with a signal-to-noise ratio as high as 17 dB. We demonstrate
4.3zN/ Hz force sensitivity, which is the best force sensitivity achieved thus far with a mechanical resonator. Our work is an
important step toward imaging individual nuclear spins and studying the coupling between mechanical vibrations and electrons
in different quantum electron transport regimes. |
Abstract:
|
Peer Reviewed |
Subject(s):
|
-Àrees temàtiques de la UPC::Física -Carbon nanotubes -Nanomechanical resonator -Nanotubs de carboni |
Rights:
|
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
|
Article - Published version Article |
Published by:
|
ACS
|
Share:
|
|