Ghost-induced exact degeneracies
ORAL
Abstract
We show that the recently discovered "ghost coupling" (Opt. Lett. 46, 1708-1711 (2021)) – a new type of mode interaction mediated by a special class of nonuniform waves in biaxial anisotropic media – can lead to exact frequency degeneracies in guided modes. In addition to explaining the mode interaction through a coupled mode analysis, we also show that the interaction can lead to emergence of exceptional points which can offer a new approach to optical sensing with better performance.
*The authors acknowledge support for this work from the National Science Foundation under Grant No. DMREF – 1629276 and the Gordon and Betty Moore Foundation.
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Presenters
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Emroz Khan
- Purdue University