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Pulsed laser deposited Er,Yb:YVO4 waveguiding films on MgO/Si substrates |
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| Authors: | DR Milev PA Atanasov IG Dimitrov GV Avdeev |
| Institution: | a Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria b Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, “Acad. G. Bonchev” Str., Bl.11, 1113 Sofia, Bulgaria c Institute of Physical Chemistry “Rostislaw Kaischew”, Bulgarian Academy of Sciences, “Acad. G. Bonchev” Str., Bl.11, 1113 Sofia, Bulgaria |
| Abstract: | Erbium, and erbium and ytterbium co-doped YVO4 waveguiding films were deposited on MgO/Si substrates by PLD. The samples were post-annealed at two different temperatures in air atmosphere. The influence on the crystalline structure and waveguiding properties of the films at these annealing temperatures for two dopant concentrations was investigated. Layers annealed up to 900 °C are polycrystalline. The dominant fraction of YVO4 crystallites exhibited preferred orientation of the (0 0 1) zone axes parallel to the substrate surface. The polycrystalline samples show difference in the refractive indexes Δn (Δn = nTE − nTM) for TE and TM polarizations. |
| Keywords: | Pulsed laser deposition Rare-earth doped YVO4 waveguides Structural and optical properties MgO buffer layer |
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