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Photonic bandgaps with defects and the enhancement of Faraday rotation

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3 Author(s)
Steel, M.J. ; Dept. of Appl. Phys., Columbia Univ., New York, NY, USA ; Levy, M. ; Osgood, R.M., Jr.

We investigate enhancement of magnetooptical rotation in periodic magnetic garnet thin-film stacks with defects using a combination of coupled-mode theory and matrix calculations. We prove that a combination of high rotation per unit length and high output is unattainable for a symmetric grating with a single central defect. We demonstrate that the addition of a second defect introduces sufficient degrees of freedom to allow high transmission for a much larger range of rotation angles than was previously possible. We present a number of designs with emphasis an achieving 45/spl deg/ rotation in very short propagation lengths.

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Lightwave Technology, Journal of  (Volume:18 ,  Issue: 9 )