Photoluminescence properties of ordered Bi_4-xNd _xTi₃O₁₂ matrix supported by 3-dimensional silicon microchannel plate

Ordered ferroelectric neodymium (Nd)-substituted bismuth titanate (Bi _4-xNd_xTi₃O₁₂) is fabricated on silicon microchannel plates (Si-MCPs). A significantly enhanced photoluminescence peak at about 890 nm (∼1.4 eV) corresponding to the 4 f³ - 4 f³ forced electric dipole transition from the ⁴I_9/2 ground state to different excited states of Nd ³⁺ is observed. Moreover, the near-infrared emission intensity can be tuned by adjusting the Nd composition. The effects can be ascribed to the difference in the host lattice between the Nd-doped titanate with a simple perovskite structure and the result rendered by the regular cubic array of the Si-MCPs.