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Phys Rev Lett. 2009 Mar 20;102(11):113601. Epub 2009 Mar 19.

Photonic micro-electromechanical systems vibrating at X-band (11-GHz) rates.

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Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109, USA.


We report on an opto-mechanical resonator with vibration excited by compressive radiation pressure via stimulated Brillouin scattering [SBS]. We experimentally excite a mechanical whispering-gallery mode (WGM) from an optical WGM and detect vibration via the red Doppler shifted (Stokes) light it scatters. We numerically solve the stress-strain equation to calculate the circumferentially circulating mechanical WGM and reveal mechanical WGMs with a variety of transverse shapes. Frequency in our device is limited by the shortest optical wavelength it can transmit, irrespective of device size.

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