Oscillatory Vertical Coupling between a Whispering-Gallery Resonator and a Bus Waveguide

M. Ghulinyan, F. Ramiro-Manzano, N. Prtljaga, R. Guider, I. Carusotto, A. Pitanti, G. Pucker, and L. Pavesi
Phys. Rev. Lett. 110, 163901 – Published 15 April 2013; Erratum Phys. Rev. Lett. 112, 199901 (2014)

Abstract

We report on a theoretical and experimental study of the optical coupling between a whispering-gallery type resonator and a waveguide lying on different planes. In contrast to the usual in-plane geometry, the present vertical one is characterized by an oscillatory behavior of the effective coupling as a function of the vertical gap. This behavior manifests itself as oscillations in both the resonance peak waveguide transmission and the mode quality factor. An analytical description based on coupled-mode theory and a two-port beam-splitter model of the waveguide-resonator vertical coupling is developed for arbitrary phase-matching conditions and is successfully used to interpret the experimental observations.

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  • Received 21 October 2011

DOI:https://doi.org/10.1103/PhysRevLett.110.163901

© 2013 American Physical Society

Erratum

Erratum: Oscillatory Vertical Coupling between a Whispering-Gallery Resonator and a Bus Waveguide [Phys. Rev. Lett. 110, 163901 (2013)]

M. Ghulinyan, F. Ramiro-Manzano, N. Prtljaga, R. Guider, I. Carusotto, A. Pitanti, G. Pucker, and L. Pavesi
Phys. Rev. Lett. 112, 199901 (2014)

Authors & Affiliations

M. Ghulinyan1,*, F. Ramiro-Manzano2, N. Prtljaga2,†, R. Guider2,‡, I. Carusotto3, A. Pitanti4, G. Pucker1, and L. Pavesi2

  • 1Advanced Photonics and Photovoltaics Unit, Fondazione Bruno Kessler, I-38123 Povo, Italy
  • 2Department of Physics, Nanoscience Laboratory, University of Trento, I-38123 Povo, Italy
  • 3INO-CNR BEC Center and Department of Physics, University of Trento, I-38123 Povo, Italy
  • 4NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56127 Pisa, Italy

  • *ghulinyan@fbk.eu
  • Present address: Department of Physics and Astronomy, University of Sheffield, S3 7RH Sheffield, United Kingdom.
  • Present address: Institute of Semiconductor and Solid State Physics, Johannes Kepler Universität, Altenbergerstrasse 69, A-4040 Linz, Austria.

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Issue

Vol. 110, Iss. 16 — 19 April 2013

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