Polarization dependence of the propagation constant of leaky guided modes

Adi Pick, Nimrod Moiseyev

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We show that transverse-magnetic (TM) leaky modes can propagate further than transverse electric (TE) modes in real-index dielectric waveguides. We compute the density of states and find that while the TE spectrum contains only overlapping resonances, the TM spectrum typically contains several isolated peaks. By transforming the TM equation into a Schrödinger-type equation, we show that these isolated peaks arise due to δ-function barriers at the core-cladding interface. Our theory is useful for a range of applications, including filtering TM modes from initially unpolarized light and transferring information between distant waveguides.

Original languageAmerican English
Article number043854
JournalPhysical Review A
Volume97
Issue number4
DOIs
StatePublished - 24 Apr 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018 American Physical Society.

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