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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.
Efficiency as high as 26% is obtained for generation of mid-infrared radiation at 6.04μm by frequency doubling of ammonia laser emission at 12.08μm in a 15mm long type-I cut AgGaSe 2 crystal. The NH 3 laser used for this work is optically pumped by a commercial TEA CO 2 laser operating on 9.22μm and produces pulsed output of ∼210mJ with a duration of ∼200ns at 12.08μm. The...
A new NLO material, urea doped benzophenone single crystals having different concentrations of urea were grown by slow solvent evaporation technique. The role of urea in benzophenone–ethanol–urea liquid system was analyzed by FTIR and dielectric studies at 1kHz. The observed N–H stretching in addition to benzophenone functional groups absorptions in FTIR spectrum recorded on the grown crystal confirms...
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