Structure de mise en forme 2 colonnes

Dr. Zuobin Wang – University of Cardiff (UK)
Dr. Maddalena Rostagno – DIAD Group (I)


Micro-optomechanical device vibrates at record rates


Micro-optomechanical device vibrates at record rates Optical electrostriction in microelectromechanical systems enables vibration at 11GHz and allows resonance frequency scaling with wavelength rather than device size. Devices resonating both optically and mechanically can exhibit coupled mechanical and electromagnetic modes. Optomechanical interactions have recently been mediated through light forces applied to one of the device elements.
However, as a result, the resonant frequency of microelectromechanical systems (MEMS) has become inherently limited by miniaturization of the relevant element, while the vibration frequency is determined by the element's sound-crossing time. For example, to generate >1GHz vibration, fabrication resolution of better than 1*m is generally needed. To increase the frequencies of photonic MEMS the optical electrostriction was exploited. The MEMS operates continuously at room temperature and pressure. The vibration is self-excited, without any need for external modulation or feedback. The approach allows excitation of high frequencies and scales inversely with optical wavelength, irrespective of device size. The authors (Tal Carmon and Matthew Tomes, Department of Electrical Engineering, University of Michigan) will next explore shorter-wavelength UV lasers and materials with fast sound velocity, which will allow future photonic MEMS vibrating at frequencies >100GHz.
Hydromel project is fully involved in MEMS market with its end users and RTD performed. In particular partner FEMTOTOOLS (CH) (end user for HYDROMEL DEMO1, see picture attached) was recently awarded at the SWISS TECHNOLOGY AWARD 2009 for its recent development in MEMS reliable and efficient production, packaging and assembling. 

Other info at http://spie.org/x38627.xml?ArticleID=x38627  and http://www.femtotools.com/index.php?page=5&sub=51