This research aims to create interfaces between light and electronics, through their common interaction with a mechanical element. Such interfaces can be used to integrate quantum photonic systems with quantum superconducting circuits in future quantum information devices, for improved on-chip clocks and receivers for mobile communications that benefit from laser control and measurement, and for scalable photonic circuitry and photonic links in next generation computer chips, among other applications. In a very early demonstration carried out in the group, this aim was achieved through electrical gradient forces applied to a microtoroid resonator through the use of external electrodes, see Fig. (a). This approach, which combined strong electrical actuation with ultrasensitive optical transduction , enabled the demonstration of external feedback cooling , as well as the control of parametric instability in optomechanical resonators . Recently, we have demonstrated an improved actuation scheme, based upon electrodes directly patterned upon the surface of the device to be tuned, see Fig. (b) - top. When a bias voltage is applied, the attractive capacitive force between the electrodes mechanically strains the device, see Fig. (b) – bottom, changing its optical properties. This opto-electromechanical coupling can for instance be used to tune the resonator’s optical whispering gallery mode resonances with several key advantages, such as allowing for very fast tuning of the resonances (reaching up to the tens of MHz range), combined with minimal power expenditure and potential for dense integration . Building upon this platform, we harnessed the inherent nonlinearity of the optomechanical interaction to present the first demonstration of a radiation-pressure driven optomechanical system locking to an inertial drive. Using an electrical injection signal applied to the device electrodes (see Fig. (c) - top), we suppress drift in the optomechanical oscillation frequency, strongly reducing phase noise, and employ this injection tone to tune the mechanical oscillation frequency by more than 2 million times its narrowed linewidth, (see Fig. (c) – bottom). This approach may also enable control of the optomechanical gain competition between different mechanical modes of a single resonator . These developments present important applications for on-chip photonic circuitry and precision sensing. Our research efforts are currently focussed on developing new geometries combining greatly enhanced optomechanical/electromechanical coupling rates for micro-photonic and quantum-mechanical applications.