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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 22, Iss. 1 — Jan. 1, 2005
  • pp: 254–260

Nanomagnetic route to bias-magnet-free, on-chip Faraday rotators

Miguel Levy  »View Author Affiliations


JOSA B, Vol. 22, Issue 1, pp. 254-260 (2005)
http://dx.doi.org/10.1364/JOSAB.22.000254


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Abstract

The miniaturization of Faraday rotator elements is of interest in optical telecommunications for the production of small isolator components. Here we discuss the fabrication of bias-magnet-free-waveguide Faraday rotators for ultrasmall planar device applications. Photonic-crystal structures on magnetic films can yield a significant enhancement in magneto-optic rotation efficiency and an overall reduction in device dimensions. By introducing single-domain magnetic nanoparticles as defects in the photonic bandgap, we show that one can maintain a high degree of coercivity in the Faraday rotator, thus obviating the need for external magnets. We present a theoretical discussion of the formation of single-domain particles in magnetic garnet films, their reversal field characteristics, and the waveguide properties and magneto-optic response of photonic crystals with single-domain defects.

© 2005 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.2240) Optical devices : Faraday effect
(230.3810) Optical devices : Magneto-optic systems
(250.5300) Optoelectronics : Photonic integrated circuits

Citation
Miguel Levy, "Nanomagnetic route to bias-magnet-free, on-chip Faraday rotators," J. Opt. Soc. Am. B 22, 254-260 (2005)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-22-1-254

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