Efficient Mode Conversion in Gd(.5)Y(2.5)Ga, Iron Garnet Thin Film Waveguides

Abstract

The implementation of periodic reversals of magnetization along the direction of propagation of light, at locations where TE and TM modes become 180 degrees out of phase, is discussed. Two approaches were followed: (1) the conventional electrical serpentine circuit and (2) a novel periodic permalloy structure. Using these techniques, we have observed conversion efficiencies of 92% and 80%, respectively, in two Gd5 Ga1 iron garnet thin film waveguides grown on GGG substrates. Experimental results are examined in the light of the theory of electromagnetic wave propagation through bulk crystals possessing both Faraday rotation and birefringence, adapted to the case of mode conversion in magneto-optic waveguides.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1973
Accession Number
AD0769132

Entities

People

  • Axel R. Reisinger
  • Carl G. Powell
  • Samuel C. Tseng

Organizations

  • IBM Thomas J. Watson Research Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Birefringence
  • Conversion
  • Efficiency
  • Electromagnetic Fields
  • Electromagnetic Wave Propagation
  • Films
  • Magnetic Domains
  • Magnetic Fields
  • Magnetization
  • Modulation
  • Phase
  • Rotation
  • Substrates
  • Thin Films
  • Wave Propagation
  • Waveguides

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.