EXCIMER-LASER ABLATING PREPARATION OF BA2NANB5O15 THIN-FILMS ON KTIOPO4 SUBSTRATE AND ITS GUIDE WAVE PROPERTY

Highly (100)-, (001)- and (100)-oriented Ba2NaNb5O15 thin films were s uccessfully prepared on (100)-, (010)- and (001)-oriented KTiOPO4 plat es, respectively, by excimer laser ablation technique, The crystallini ty and quality of the as-prepared thin films were very well by checkin g with the X-ray theta-2 theta scan and pole-figure analysis, scanning electron microscopy and X-ray photoelectron spectrometry. The m-line spectroscopy was used to evaluate the guide wave property of the as-pr epared films. Favorable waveguiding properties were demonstrated by th e measurements of propagation loss lower than 1.0 dB/cm for all wavegu ide modes. The 'non-critical' matching in the guide wave mode can be a chieved in the present systems.