A few recent works suggest the possibility of controlling light propagation at the interface of periodic multilayers supporting Bloch surface waves (BSWs), but optical resonators based on BSWs are yet to be demonstrated. Here we discuss the feasibility of exploiting guided BSWs in a ring resonator configuration. In particular, we investigate the main issues related to the design of these structures, and we discuss their limitations in terms of quality factors and dimensions. We believe these results might be useful for the development of a complete BSW-based platform for applications ranging from optical sensing to the study of the light–matter interaction in micro and nano structures.
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