Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Leaky modes in coupled photonic bandgap waveguides

Not Accessible

Your library or personal account may give you access

Abstract

We identify and analyze a class of leaky modes in two coupled identical photonic bandgap (PBG) slab waveguides. These leaky modes originate from the modes of the array structure that separates the two waveguides and may introduce additional losses to the coupled PBG waveguides when operating as a directional coupler. We derive an approximate formula to show explicitly how the leakage losses of such modes decrease exponentially with an increase in the thickness of the guiding layers. With numerical examples, we show that the leakage losses vary over a wide range, depending on the waveguide parameters. These leaky modes precede the guided modes according to the ranking of the mode indices and thus affect the orders of the guided modes. Their presence provides a simple physical explanation of the unusual phenomenon that the orders of the symmetric and antisymmetric guided modes of two coupled PBG waveguides depend on the number of the high-index elements in the array structure between the waveguides.

© 2008 Optical Society of America

Full Article  |  PDF Article
More Like This
Analysis of one-dimensional high-index guiding photonic bandgap waveguides

Jie Li and Kin Seng Chiang
J. Opt. Soc. Am. B 26(11) 2007-2015 (2009)

Guided modes of one-dimensional photonic bandgap waveguides

Jie Li and Kin Seng Chiang
J. Opt. Soc. Am. B 24(8) 1942-1950 (2007)

Higher-order core-guided modes in two-dimensional photonic bandgap fibers

Vincent Pureur and Boris T. Kuhlmey
J. Opt. Soc. Am. B 29(7) 1750-1765 (2012)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (20)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved