Growth of Inclusion Free KTP Crystals by Top Seeded Solution Growth and their Characterization

KTiOPO4 single crystals of dimensions 34 × 15 × 15 mm3 have successfully been grown by Top Seeded Solution Growth (TSSG), using phosphate flux (K6P4O13), employing a home made vertical cylindrical three zone resistive heated furnace. Growth experiments were carried out with seed orientation. A metho...

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Veröffentlicht in:	Crystal research and technology (1979) 2002-10, Vol.37 (10), p.1049-1057
Hauptverfasser:	Kannan, C. V., Ganesamoorthy, S., Kumaragurubaran, S., Subramanian, C., Sundar, R., Ramasamy, P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Dielectric, piezoelectric, ferroelectric and antiferroelectric materials Dielectrics, piezoelectrics, and ferroelectrics and their properties Exact sciences and technology ferroelectric phase transition Fundamental areas of phenomenology (including applications) Growth from solutions Kdp- and tgs-type crystals KTP Materials science Methods of crystal growth physics of crystal growth Nonlinear optical crystals nonlinear optics Optical materials Optics Physics TSSG
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Zusammenfassung:	KTiOPO4 single crystals of dimensions 34 × 15 × 15 mm3 have successfully been grown by Top Seeded Solution Growth (TSSG), using phosphate flux (K6P4O13), employing a home made vertical cylindrical three zone resistive heated furnace. Growth experiments were carried out with seed orientation. A method to grow inclusion free crystal with less dislocation density is proposed, by employing cooling rate of 0.5‐2 K/day and rotation rate of 60‐30 rpm. UV‐VIS transmission studies were performed and the dependence of absorption coefficient with wavelength is discussed. SHG elements of dimension 8 × 7.5 × 7.5 mm3 were fabricated and conversion efficiency of 58 % was achieved without antireflection coating. Nature of ionic conductivity and ferroelectric phase transition behavior of KTP crystals along the crystallographic polar axis in the frequency range of 100 Hz – 10 MHz are discussed.
ISSN:	0232-1300 1521-4079
DOI:	10.1002/1521-4079(200210)37:10<1049::AID-CRAT1049>3.0.CO;2-F