Q-Boosted Optomechanical Resonators (ORCHID)
Clark Nguyen1 and Ming C. Wu
Defense Advanced Research Projects Agency Grant No. FA9550-10-1-0293
This project aims to explore methods for attaining optomechanical resonators with simultaneous high optical Qo and high mechanical QM, plus optomechanically reduced mechanical noise, for use as ultra-low-noise microwave oscillators for chip-scale atomic clocks and sensors. The crux of the proposed work is a mechanical circuit shown in the figure below that allows independent optimization of the optical Qo and mechanical QM of the composite resonant structure, thereby obviating the need to trade-off Qo and QM that has hindered previous optomechanical resonator designs. This effort is funded by the Defense Advanced Research Projects Agency (DARPA) under the ORCHID program.
Figure 1: Scanning electron micrograph (SEM) of an anneal-smoothed spoke-supported PSG optomechanical disk resonator.