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Low loss single-crystal silicon mechanical resonators for the investigation of thermal noise statistical properties.

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Title: Low loss single-crystal silicon mechanical resonators for the investigation of thermal noise statistical properties.
Authors: Serra, E.1,2,3 eserra@fbk.eu, Bonaldi, M.3,4, Borrielli, A.3,4, Conti, L.5, Pandraud, G.3, Sarro, P.M.3
Source: Sensors & Actuators A: Physical. May2015, Vol. 227, p48-54. 7p.
Subjects: Resonators, Thermal noise, Single crystals, Energy harvesting, Signal processing
Abstract: Silicon resonators are widely used in a large class of applications including sensing and actuation, signal processing and energy harvesting. Very often, the application for which these sensors are designed requires the deposition of thin films or coatings, in order to modify the optical coupling, the electrical conductivity or other physical–chemical properties of the device. Invariably coatings degrade the quality factor ( Q ) of resonance by increasing the amount of energy dissipated during vibration. Generally this is an unwanted effect. In fact, developing strategies for controlling damping due to film deposition is vital for the design of high-performance resonators requiring low energy losses. In this paper, we present the results of our strategy for damping control applied to a class of high- Q silicon resonators used for the investigation of thermal noise statistical properties in non-thermodynamic equilibrium both at room temperature and cryogenic temperatures. [ABSTRACT FROM AUTHOR]
Copyright of Sensors & Actuators A: Physical is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Silicon resonators are widely used in a large class of applications including sensing and actuation, signal processing and energy harvesting. Very often, the application for which these sensors are designed requires the deposition of thin films or coatings, in order to modify the optical coupling, the electrical conductivity or other physical–chemical properties of the device. Invariably coatings degrade the quality factor ( Q ) of resonance by increasing the amount of energy dissipated during vibration. Generally this is an unwanted effect. In fact, developing strategies for controlling damping due to film deposition is vital for the design of high-performance resonators requiring low energy losses. In this paper, we present the results of our strategy for damping control applied to a class of high- Q silicon resonators used for the investigation of thermal noise statistical properties in non-thermodynamic equilibrium both at room temperature and cryogenic temperatures. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Sensors & Actuators A: Physical is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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