Release-free silicon-on-insulator cavity optomechanics
  We demonstrate optically coupled nanomechanical resonators fabricated on silicon-on-insulator. Silicon fin waveguides are used to control the dispersion of mechanical waves and engineer localized resonances by modulation of the fin properties. A photonic crystal cavity is designed to localize laser light near the fin and the mechanical motion is read out and modified by radiation pressure back-action. We expect devices and systems made from similar structures to enable co-integration of signal transduction and processing capabilities via electronic, photonic, and phononic degrees freedom in a single scalable platform. 
Christopher J. Sarabalis, Yanni D. Dahmani, Rishi N. Patel, Jeff T.   Hill, Amir H. Safavi-Naeini
physics.optics