Intermode reactive coupling induced by waveguide-resonator interaction

Year: 2014

Authors: Ghulinyan M., Ramiro Manzano F., Prtljaga N., Bernard M., Pavesi L., Pucker G., Carusotto I.

Autors Affiliation: Centre for Materials and Microsystems, Fondazione Bruno Kessler, I-38123 Povo, Italy; Nanoscience Laboratory, Department of Physics, University of Trento, I-38123 Povo, Italy; INO-CNR BEC Center and Department of Physics, University of Trento, I-38123 Povo, Italy

Abstract: We report on a joint theoretical and experimental study of an integrated photonic device consisting of a single-mode waveguide vertically coupled to a disk-shaped microresonator. Starting from the general theory of open systems, we show how the presence of a neighboring waveguide induces a reactive intermode coupling in the resonator, analogous to an off-diagonal Lamb shift in atomic physics. Observable consequences of this coupling manifest as peculiar Fano line shapes in the waveguide transmission spectra. The theoretical predictions are validated by full vectorial three-dimensional finite-element numerical simulations and are confirmed by the experiments.


Volume: 90 (5)      Pages from: 053811  to: 053811

KeyWords: microcavity; interference;
DOI: 10.1103/PhysRevA.90.053811

Citations: 22
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