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Proceedings Paper

Bound states in the continuum in symmetric and asymmetric photonic crystal slabs
Author(s): Anton I. Ovcharenko; Cédric Blanchard; Jean-Paul Hugonin; Christophe Sauvan
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Paper Abstract

We model a photonic crystal slab as a Fabry-Perot resonator with two propagating Bloch waves in the periodic medium. This provides a semi-analytical recipe for the computation of photonic crystal slab modes' dispersion and quality factors. We apply for the search and study of bound states in the continuum, which exist above the light line, among the leaky modes, but nevertheless are decoupled from the continuum of propagating modes and are confined inside the periodic medium. We identify them as a set of optogeometric parameters for which the quality factor of a given photonic crystal mode goes to infinity. Also, we illustrate a simple example of the vertical symmetry breaking by adding a semi-infinite dielectric substrate, and comment on some other asymmetric configurations.

Paper Details

Date Published: 5 September 2019
PDF: 7 pages
Proc. SPIE 11081, Active Photonic Platforms XI, 110812F (5 September 2019);
Show Author Affiliations
Anton I. Ovcharenko, Lab. Charles Fabry, Institut d'Optique Graduate School, CNRS, Univ. Paris-Saclay (France)
Cédric Blanchard, CEMHTI, CNRS, Univ. d'Orleans (France)
Jean-Paul Hugonin, Lab. Charles Fabry, Institut d'Optique Graduate School, CNRS, Univ. Paris-Saclay (France)
Christophe Sauvan, Lab. Charles Fabry, Institut d'Optique Graduate School, CNRS, Univ. Paris-Saclay (France)


Published in SPIE Proceedings Vol. 11081:
Active Photonic Platforms XI
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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