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This study investigates on the laser-induced periodic surface structures (LIPPS) formation in single-crystalline ZnO semiconductors with two distinct types of ripple structures, characterized by the lower and higher spatial frequency LIPPS. Results are shown and interpreted in the frame of a Drude-model including a nonlinear process at the irradiated surface. In addition, results reveal the influence...
Angularly and spectrally resolved second harmonic studies for c-axis ZnO nanorods are reported. 7.5 times higher efficiency than for BBO was found at 55 GW/cm2 at Ti:sapphire laser oscillator wavelengths. Spectral profiles agree with simulations.
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