Abstract
We present a study of augmented whispering gallery mode optical resonators that contain one or more narrow slots, through which the optical field exits the resonator's dielectric material and propagates in free space. We developed a theoretical model describing the micro-slotted resonator mode spectrum, and we find the theoretical results of the single-slot case are in close agreement with experimental observations. Furthermore, we examine a double-slot configuration that forms a cantilever-like partition within the circulating high-Q optical modes. The system exhibits high displacement sensitivity that could lead to optomechanical sensing applications.
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