Optical diffraction of second-harmonic signals in the LiBO2-Nb2O5 glasses induced by self-organized LiNbO3 crystallites

B. Harihara Venkataraman (1) , N. Syam Prasad (1) , K. B. R. Varma (1) , Vincent Rodriguez (2) , Mario Maglione (3) , Régnault von Der Mühll (3) , Jean Etourneau (3)

1 Materials Research Centre
2 LPCM - Laboratoire de Physico-Chimie Moléculaire
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

The nanocrystallites (~ 3nm) of LiNbO3, evolved in the (100–x)LiBO2-xNb2O5 (5 < x < 20, in molar ratio) glass system exhibited intense second-harmonic signals in transmission mode when exposed to infrared (IR) light at g =1064 nm. The second-harmonic waves were found to undergo optical diffraction which was attributed to the presence of self-organized submicrometer-sized LiNbO3 crystallites that were grown within the glass matrix along the parallel damage fringes created by the IR laser radiation. Micro-Raman studies carried out on the laser-irradiated samples confirmed the self-organized crystallites to be LiNbO3.

Mots clés: Nanocrystals and nanoparticles; Frequency conversion; harmonic generation; including higher-order harmonic generation; Glasses; quartz; Nonmetallic inorganics; Ultraviolet; visible; and infrared radiation effects

Domaines: Matériaux

B. Harihara Venkataraman, N. Syam Prasad, K. B. R. Varma, Vincent Rodriguez, Mario Maglione, et al.. Optical diffraction of second-harmonic signals in the LiBO2-Nb2O5 glasses induced by self-organized LiNbO3 crystallites. Applied Physics Letters, 2005, vol. 87, n° 9, p. 091113 (3 p.). ⟨10.1063/1.2037198⟩. ⟨hal-00095996⟩