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Polarization-dependent refractive-index change induced by superlattice disordering

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5 Author(s)
Y. Suzuki ; NTT Opto-Electron. Labs., Kanagawa, Japan ; H. Iwamura ; T. Miyazawa ; A. Wakatsuki
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A model of the polarization-dependent refractive-index change that accompanies superlattice disordering is proposed for the first time. Calculated results agree well with experimental results in terms of the amount and direction of the refractive-index changes. In the GaAs-AlAs system, a simple diffusion model that considers the diffusion of group III atoms explains the experimental results. In a InGaAs-InP system, it is assumed that group V atoms mainly induce disordering, and the difference between the diffusion constant in wells and that in barriers is taken into account. The refractive-index changes induced by superlattice disordering are useful for fabricating polarization control devices and integrated optical circuits

Published in:

IEEE Journal of Quantum Electronics  (Volume:32 ,  Issue: 11 )