Title :
Cz-growth of ferroelectric LaBGeO5 single crystals
Author :
Miyazawa, S. ; Kanamori, T. ; Ichikawa, S. ; Nakae, H.
Author_Institution :
Kagami Memorial Lab. Mater. Sci. & Technol., Waseda Univ., Tokyo, Japan
Abstract :
Cz-growth of ferroelectric LaBGeO5 single crystals is reported. The crystal growth was carried out along the [0001]-axis with pulling rates ranged in 0.5~2.5mm/h and crystal rotation rates of 15~25 rpm in N2-, air and O2-flowing. A N2 and air-flowing resulted in crystals with misoriented subgrains, while an O2-flowing was successful for growing colorless, transparent and defects-free single crystals. An ω-scanned X-ray rocking curve revealed that an FWHM corresponding to the (0003) reflection was as narrow as 14.4 arcsec, indicating a high crystallinity. The measured optical absorption edge lies at 193.5 nm. This absorption edge is unique among many ferroelectric oxide crystals. The spectrum proves to be transparent from ~225nm up to 3.3μm.
Keywords :
X-ray reflection; absorption coefficients; boron compounds; crystal growth from melt; crystal structure; grain size; infrared spectra; lanthanum compounds; optical harmonic generation; optical materials; transparency; ultraviolet spectra; visible spectra; ω-scanned X-ray rocking curve; (0003) reflection; Czockralski-pulling method; LaBGeO5; SHG devices; [0001]-axis; crystal growth; crystal rotation; ferroelectric single crystals; misoriented subgrains; optical absorption edge; optical nonlinear property; transparency; Absorption; Crystals; Nonlinear optical devices; Optical diffraction; Optical harmonic generation; Optical reflection;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4577-0533-5
Electronic_ISBN :
Pending
DOI :
10.1109/CLEOE.2011.5942780
