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arXiv · 1910.12524

Enhanced Directional Coupling of Light with a Whispering Gallery Microcavity

Fuchuan Lei·Georgiy Tkachenko·Xuefeng Jiang·Jonathan M. Ward·Lan Yang·Síle Nic Chormaic
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Abstract

Directional coupling of light in nanophotonic circuits has recently attracted increasing interest, with numerous experimental realizations based on broken rotational or mirror symmetries of the light-matter system. The most prominent underlying effect is the spin-orbit interaction of light in subwavelength structures. Unfortunately, coupling of light to such structures is, in general, very inefficient. In this work, we experimentally demonstrate an order of magnitude enhancement of the directional coupling between two nanowaveguides by means of a whispering gallery microcavity. We also show that both transversmagnetic and transverse electric modes can be used for the enhancement.

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Fuchuan Lei, Georgiy Tkachenko, Xuefeng Jiang, Jonathan M. Ward, Lan Yang, Síle Nic Chormaic. 2020-01-16. Enhanced Directional Coupling of Light with a Whispering Gallery Microcavity. https://doi.org/10.1021/acsphotonics.9b01611

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