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Lithium niobate; doping; refractive index; X-ray photoelectron spectra; non-linear optical materials.

Congruent LiNbO₃ single crystals with Ti ion dopants (2 and 5 mol%) were successfully grown by Czochralski technique in the automatic diameter control facility. As-grown crystal boules were oriented into (0 0 1) direction cut and optically polished for all measurements. Influence of Ti-ion incorporation into LiNbO₃ was studied by core level XPS analysis. Powder X-ray diffraction studies were carried out on doped lithium niobate for phase identification. High-resolution X-ray diffraction technique was used to study the crystalline quality through full-width at half-maximum values. The refractive index values are more for doped samples than for pure sample as determined by prism coupling technique with different laser sources.

P Kumar^{1 2} S Moorthy Babu¹ S Perero^{3 2} Rajamaniccam L Sai⁴ I Bhaumik⁵ S Ganesamoorthy⁵ A K Karnal⁵

1. Crystal Growth Centre, Anna University, Chennai 600 025, India
2. Photon Lab, Istituto Superiore Mario Boella, 10138, Torino, Italy
3. Materials Science and Chemical Engineering Department, Politecnico di Torino, 10129, Torino, Italy
4. Department of Chemical Engineering, Anna University, Chennai 600 025, India
5. Laser Materials Development & Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452 013, India

Published

November 2010