Hydrothermal growth of Ti:sapphire (Ti 3+: Al 2O 3) laser crystals

Titanium(III)-doped sapphire single crystals (Ti 3+:Al 2O 3) have been grown by the hydrothermal technique for the first time. Due to Ti 3+ instability, Ti:sapphire could not easily be grown in alkaline solution. Instead, we grew the crystals in acidic solutions. The solubility of Ti 3+:Al 2O 3 in H...

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Veröffentlicht in:	Journal of crystal growth 2009-01, Vol.311 (3), p.443-447
Hauptverfasser:	Wang, Buguo, Bliss, David F., Callahan, Michael J.
Format:	Artikel
Sprache:	eng
Schlagworte:	A2. Hydrothermal technique B1. Oxides B1. Ti:sapphire B3. Solid state lasers Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Equations of state, phase equilibria, and phase transitions Exact sciences and technology Materials science Methods of crystal growth physics of crystal growth Physics Solubility, segregation, and mixing phase separation
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Beschreibung
Zusammenfassung:	Titanium(III)-doped sapphire single crystals (Ti 3+:Al 2O 3) have been grown by the hydrothermal technique for the first time. Due to Ti 3+ instability, Ti:sapphire could not easily be grown in alkaline solution. Instead, we grew the crystals in acidic solutions. The solubility of Ti 3+:Al 2O 3 in HCl hydrothermal solutions was found to exhibit a negative temperature coefficient. The grown crystals were characterized by X-ray diffraction, elemental analysis, and electron paramagnetic resonance (EPR). The results indicated that the grown crystals have a uniform distribution of Ti(III) (about 2×10 20 atoms/cc) and are of high quality.
ISSN:	0022-0248 1873-5002
DOI:	10.1016/j.jcrysgro.2008.09.052