Laser Induced Periodic Surface Crystalline Patterns on SrO-0.5Li2O-4.5B2O3 and BaO-0.5Na2O-4.5B2O3 Glasses and Optical Second Harmonic Generation

Rahul Vaish (1) , Vincent Rodriguez (2) , Mario Maglione (3) , Jean Etourneau (3) , Kalidhindi B. R. Varma (1)

1 Materials Research Centre
2 ISM - Institut des Sciences Moléculaires
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Transparent SrO-0.5Li2O-4.5B2O3 (SLBO) and BaO-0.5Na2O-4.5B2O3 (BNBO) glasses were fabricated via the conventional melt-quenching technique. The amorphous and glassy characteristics of the as-quenched samples were respectively confirmed by X-ray powder diffraction (XRD) and Differential Thermal Analysis (DTA) studies. Optically clear SLBO and BNBO glass nano/microcrystal composites were obtained by heat-treating the as-quenched glasses slightly above their respective glass transition temperatures. These glass nano/microcrystal composites exhibited second harmonic signals in transmission mode when exposed to infrared laser beam at \lambda =1064 nm. Interestingly second-harmonic waves were found to undergo optical diffraction and was attributed to the presence of self-organized microcrystalline patterns associated with 0.5-2\mu m periodicities.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Rahul Vaish, Vincent Rodriguez, Mario Maglione, Jean Etourneau, Kalidhindi B. R. Varma. Laser Induced Periodic Surface Crystalline Patterns on SrO-0.5Li2O-4.5B2O3 and BaO-0.5Na2O-4.5B2O3 Glasses and Optical Second Harmonic Generation. International Journal of Applied Glass Science, 2010, 1 (4), pp.350-357. ⟨10.1111/j.2041-1294.2010.00032.x⟩. ⟨hal-00649653⟩