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. 2017 Jun 6;7:2833. doi: 10.1038/s41598-017-02839-1

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© The Author(s) 2017

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(a) Vertical schematic of the NWs of the length L, where $\vec{k}$ is always parallel to L and normally incident on the cross section. (b) Cross section of the NWs with overall diameter D, which comprises GaAs core, t_AlGaAs thick AlGaAs shell, and t_GaAs thick GaAs supershell.