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SEM images of the ablation craters and nanowires. The laser parameters are [(a) and (b)] , linear polarization, , 500 pulses; [(c) and (d)] , linear polarization, , defocus for , 500 pulses; (e) , linear polarization, , 100 pulses; and (f) , circular polarization, , 100 pulses. The arrows in (f) show the nucleation particles for nanowire growth.
SEM images of the quasialigned nanowires grown on the ablation craters irradiated by (a) , linear polarized lasers and (b) , circular polarized lasers.
(Color online) Nanowire lengths and diameters as a function of pulse energy and wavelength. Here the laser irradiation conditions are (a) elliptical polarized lasers and (b) circular polarized lasers. The units of nanowire length and diameter are 100 and , respectively.
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