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Wurtzite Quantum Wires with Strong Spatial Confinement: Polarization Anisotropies in Single-Wire Spectroscopy

Zeller, Viola ; Mundigl, Nadine ; Faria Junior, Paulo E. ; Fabian, Jaroslav ; Schüller, Christian ; Bougeard, Dominique


We report GaAs/(Al, Ga)As nanowires in the one-dimensional (1D) quantum limit. The ultrathin wurtzite GaAs cores between 20 and 40 nm induce large confinement energies of several tens of millielectronvolts, allowing us to experimentally resolve up to four well-separated subband excitations in microphotoluminescence spectroscopy. Our detailed experimental and theoretical polarization-resolved ...


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