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Type 1.5 coupled quantum wells for electroabsorption modulation with low electric fields

A new quantum structure, the type 1.5 quantum well, is proposed and modelled. The type 1.5 quantum well has a greater absorption modulation depth with low applied fields (≈30 kV cm−1) than standard type I quantum wells. In addition, the type 1.5 quantum well has better insertion loss and attenuation characteristics under negative alpha parameter (blue chirped) conditions than standard type I quantum well materials.