Spring 2014 IAB & Research Review
March 5 - 6
Q-Boosted Optomechanical Oscillators
Recent advancements in cavity opto-mechanics have allowed researchers to exploit coupling between the optical field and mechanical motion of an optical cavity to affect cooling or amplification of mechanical motion. Cooling the mechanical motion of micro-scale objects has been of high scientific interest, since it facilitates observation and exploration of certain quantum phenomena, e.g., the standard quantum limit of detection. On the other hand, amplification of the mechanical motion allows realization of micro-scale devices for practical applications, such as light-driven low-phase noise signal generation by radiation pressure driven optomechanical oscillators (RP-OMO’s). Indeed, the ability to achieve self-sustained oscillation with no need for feedback electronics makes an RP-OMO compelling for on-chip applications where directed light energy, e.g., from a laser, is available to fuel the oscillation. This presentation describes recent efforts to combine high optical and mechanical Q materials towards Q-boosting an RP-OMO structure to a performance level suitable for use in a chip-scale atomic clock, where it can then greatly reduce power consumption.