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Reversal of Zeeman Splitting in InGaAs/InP Quantum Wires in High Magnetic Field

We report interband circularly polarized magneto-photoluminescence results for In0.53Ga0.47As quantum wires of various widths in magnetic fields up to 28 T. The experimental results reveal a highly wire width dependent Zeeman splitting compared to the quantum well reference and even a reversal of the Zeeman split transitions arising from the lowest conduction and valence states in the quantum wires. The total g-factor, g=g e+g v, is therefore highly wire width dependent.