Concept

Résonance acoustique

Publications associées (184)

Theoretical Analysis of Mechanical Displacement Measurement Using a Multiple Cavity Mode Transducer

We present an optomechanical displacement transducer that relies on three cavity modes parametrically coupled to a mechanical oscillator and whose frequency spacing matches the mechanical resonance frequency. The additional resonances allow reaching the st ...

2010

An ultrasensitive vibrating channel mass sensor based on tunnelling current detection

Maurizio Migliore

We present a new design of a mass sensor capable of detecting mass values in the zeptogram range. The sensor comprises a resonant beam and two gate electrodes used to oscillate the beam at its resonance frequency. The detection method is based on the tunne ...

World Scientific And Engineering Acad And Soc, Ag Loannou Theologou 17-23, 15773 Zographou, Athens, Greece2010

A New Passive Methodology for Reducing the Noise in Electrical Machines: Impact of Some Parameters on the Modal Analysis

Dimitri Torregrossa, Christophe Espanet

This paper presents a 3-D finite-element modal analysis to reduce the acoustical power radiated by a brushless permanent-magnet synchronous machines and avoid any resonance phenomena. The method is able to analyze the impact of some design parameters on al ...

2010

Addressing a systematic vibration artifact in diffusion-weighted MRI

Daniel Gallichan

We have identified and studied a pronounced artifact in diffusion-weighted MRI on a clinical system. The artifact results from vibrations of the patient table due to low-frequency mechanical resonances of the system which are stimulated by the low-frequenc ...

Wiley-Blackwell2010

Active multi gate micro-electro-mechanical device with built-in transistor

Mihai Adrian Ionescu, Daniel Grogg

The present invention exploits the combination of the amplification, provided by the integration of a FET (or any other three terminal active device), with the signal modulation, provided by the MEM resonator, to build a MEM resonator with built-in transis ...

2010

Resonant-Body Fin-FETs with sub-nW power consumption

Mihai Adrian Ionescu, Andrea Lovera, Dimitrios Tsamados, Daniel Grogg, Sebastian Thimotee Bartsch

This paper presents, for the first time, experimental evidence on resonant-body Fin-FETs (RB-FinFET) with two independent lateral gates, operated from weak to strong inversion, which enables unique trade-off between power consumption and gain. Resonance fr ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Controlling plasmonic resonances in binary metallic nanostructures

Olivier Martin

Investigation on the interplay of plasmonic resonances in binary nanostructures indicated that, at a fixed wavelength, with a variation in the difference permittivity ratio eta=(epsilon(2)-epsilon(0)/epsilon(1)-epsilon(0)), resonances exhibit the dielectri ...

2010

Nano-Electro-Mechanical vibrating body FET resonator for high frequency integrated oscillators

Mihai Adrian Ionescu, Andrea Lovera, Daniel Grogg

Mechanical resonators are attractive for many applications in signal processing and sensing applications [1]. However, the aggressive scaling of their dimensions into the nanometer range with a simultaneous increase of the resonance frequency makes their d ...

2010

Brillouin Distributed Fibre Sensing: State of the Art and Perspectives

Luc Thévenaz

Developed societies require more and more information for their safety and for their economic development. Recent disasters due to landslides, fires in tunnels and collapses of bridges are a source of serious concern on the part of the public which seeks f ...

Materials Research Society of Singapore2009

Micromirrors for integrated tunable mid-infrared detectors and emitters

Niels Quack

The mid-infrared range is of interest in spectroscopic applications, due to the large number of organic compounds that exhibit characteristic absorption bands in this spectral region. Semiconductor technology, however, has been developed mainly for the nea ...

ETH2009

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