28 February 2006 Magneto-optical circulator in two-dimensional photonic crystals
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Abstract
We propose a systematic approach to miniaturize magneto-optical device down to a single wavelength scale through the use of photonic crystal resonances. The nonreciprocal transport, typically found in magneto-optics, is highly enhanced in structures with strong field localization. The devices are magnetically biased along the out-of-plane direction (Voigt configuration). An optimized magnetic domain design maximally couples the standing-wave eigenstates in the resonance. As a conceptual demonstration, we demonstrate the design guideline in two-dimensional photonic crystal cavities, which can be readily extended into designing two-dimensional slab structures with the same functionality. A three-port junction circulator containing bismuth-iron-garnet is modeled with finite-difference time-domain schemes and demonstrates a 30dB-isolation bandwidth well over 100GHz.
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Zheng Wang, Zheng Wang, Shanhui Fan, Shanhui Fan, } "Magneto-optical circulator in two-dimensional photonic crystals", Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 61280D (28 February 2006); doi: 10.1117/12.646874; https://doi.org/10.1117/12.646874
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