MEMSuniverse » Photonic http://www.memsuniverse.com A Passion for Creativity & Innovation Tue, 23 Oct 2012 21:57:22 +0000 en-US hourly 1 http://wordpress.org/?v=3.4.2 optomechanical resonator http://www.memsuniverse.com/mems/optical-mems/optomechanical-resonator.html http://www.memsuniverse.com/mems/optical-mems/optomechanical-resonator.html#comments Wed, 24 Feb 2010 23:08:07 +0000 admin http://www.memsuniverse.com/?p=2308 Optomechanical GHz Oscillator and Spectroscopy. Just like the spectral signature of materials originates from molecular vibrations, photonic devices have many spectral lines originating from their different mechanical modes. Our group has excited these modes using the radiation pressure produced by light circulating within the device (1, 2, 3) which oscillate regeneratively at controllable mechanical eigen-frequencies up to microwave rates. There is no feedback or externally-applied modulation in the experiment and the optical input is continuous. Microwave-rate oscillations build-up from an inherent parametric process. This is therefore both a spectroscopic technique and a micro-mechanical device.
As reported by Carmon, T. and Vahala, K. in PRL

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]]> http://www.memsuniverse.com/mems/optical-mems/optomechanical-resonator.html/feed 0 Photonic MEMS: Vibration at the nano-scale (a) http://www.memsuniverse.com/mems/photonic-mems-vibration-at-the-nano-scale-a.html http://www.memsuniverse.com/mems/photonic-mems-vibration-at-the-nano-scale-a.html#comments Sat, 05 Dec 2009 19:48:14 +0000 admin http://www.memsuniverse.com/?p=1673 Here we see how an electrical field applied by light can compress material to excite mechanical vibration.
We replace metal electrodes with the electrical field that light applies to create a train of virtual electrodes that are almost exactly 250 nm apart. These virtual electrodes act collectivity to excite a mechanical mode, illustrated above, that is vibrating at rates higher than 1000 millions time per second (10 GHz). Our demonstration (reported in
http://eecs.umich.edu/~tcarmon/PhysRevLett_102_113601.pdf) constitutes the faster micron-scaled oscillator not only among photonic MEMS (micro electro mechanical system) but also in comparison to any other type of MEMS. This research is conducted by Mathew (Matt) Tomes and Prof. Tal Carmon.

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