Growth of β-BBO Thin Films on Sr~(2+)-doped α-BBO Substrates

Crystallineβ-BBO thin films were successfully prepared on(001)-oriented Sr~(2+)-dopedα-BBO substrates by using liquid phase epitaxy,pulsed laser deposition and vapor transport equilibration techniques.The films were characterized by X-ray diffraction and X-ray rocking curve.The present results manifest that theβ-BBO thin films grown on Sr~(2+)-dopedα-BBO substrates have larger degree of orientation f value and smaller X-ray rocking curve FWHM than the ones grown on other reported substrates.Compared with other substrates,α-BBO has the similar structure,the same UV cutoff and the same chemical properties toβ-BBO.These results reveal that Sr~(2+)-dopedα-BBO single crystal may be a promising substrate proper to the growth ofβ-BBO films.