TM optical modes paired with vertically breathing mechanical modes in metamaterial-cladded silicon membranes produce boundary-dominated forward Brillouin scattering at 12 GHz with 7200 W^{-1} m^{-1} gain and Q=620, the highest gain-to-Q ratio in silicon waveguides.
Nonlinear optical properties of silicon waveguides.Semiconductor Science and Technology, 23(6):064007
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Boundary-dominated optomechanics in silicon metamaterial membranes
TM optical modes paired with vertically breathing mechanical modes in metamaterial-cladded silicon membranes produce boundary-dominated forward Brillouin scattering at 12 GHz with 7200 W^{-1} m^{-1} gain and Q=620, the highest gain-to-Q ratio in silicon waveguides.