Abstract
Textured (1 1 0)Nd:KGW optical waveguides are grown on CeO 2 /Si substrates by pulsed laser deposition. Ceria buffer layer is prepared on (1 0 0)Si substrates by KrF excimer laser ablation of Ce 0.9 Gd 0.1 O 2 ceramic target. The (1 0 0) or (1 1 1) orientation of CeO 2 depends on the deposition conditions. The Nd:KGW films are prepared by ablation of K-rich ceramic targets in O 2 or Ar. The influence of the synthesis conditions (O 2 or Ar pressure and substrate temperature) and the orientation of the CeO 2 buffer layer on the crystallinity of the Nd:KGW films are studied. Better results are obtained when deposited on (1 0 0)CeO 2 /(1 0 0)Si. The as-grown films are optically active. The crystallinity improves and the intensity of the emission spectra increases upon annealing at 700 °C in air. The emission spectra of Nd:KGW films are demonstrated for the main Nd transitions in 0.85–1.45 μm spectral range. Waveguide loss as low as 3.3 dB cm −1 is measured.
Published Version
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