Flat-top response in one-dimensional magnetic photonic bandgap structures with faraday rotation enhancement

M. Levy*, H. C. Yang, M. J. Steel, J. Fujita

*Corresponding author for this work

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

The transmission and Faraday rotation characteristics of one-dimensional photonic crystals in certain-substituted yttrium iron garnet (Ce:YIG) with multiple defects in the optical bandgap are studied theoretically at λ = 1.55 μm. It is found that the interdefect spacing can be adjusted to yield a flat top response, with close to 100% transmission and 45° Faraday rotation, for film structures as thin as 30 to 35 μm. This is better than a three-fold reduction in thickness compared to the best Ce:YIG films for comparable rotations, and may allow a considerable reduction in size in manufactured optical isolators. Transmission bands as wide as 7 nm are predicted, which constitutes a considerable improvement over previously reported bandwidths for magnetic photonic crystals. Diffraction across the structure corresponds to a longer optical path length than the thickness of the film, calling for the use of guided optics to minimize insertion losses in integrated devices. The basis for the flat-top transmission in ferrite photonic crystals is presented and discussed.

Original languageEnglish
Pages (from-to)1964-1969
Number of pages6
JournalJournal of Lightwave Technology
Volume19
Issue number12
DOIs
Publication statusPublished - Dec 2001
Externally publishedYes

Keywords

  • Magnetic films
  • Magnetic layered films
  • Magnetooptic devices
  • Magnetooptic effects
  • Magnetooptic films
  • Optical isolators
  • Optical polarization
  • Optical propagation in nonhomogeneous media

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