Enhancement of photoluminescence of glass phosphor by nanoimprint of moth-eye structure

DOI Web Site 参考文献19件
  • SHINOZAKI Kenji
    National Institute of Advanced Industrial Science and Technology (AIST)
  • KAMAKURA Ryosuke
    Department of Material Chemistry, Graduate School of Engineering, Kyoto University
  • MURAI Shunsuke
    Department of Material Chemistry, Graduate School of Engineering, Kyoto University PRESTO, Japan Science and Technology Agency (JST)
  • MIHARA Toshiyuki
    National Institute of Advanced Industrial Science and Technology (AIST)
  • KITAMURA Naoyuki
    National Institute of Advanced Industrial Science and Technology (AIST)
  • KAWACHIYA Yuki
    Department of Material Chemistry, Graduate School of Engineering, Kyoto University
  • TANAKA Katsuhisa
    Department of Material Chemistry, Graduate School of Engineering, Kyoto University
  • AKAI Tomoko
    National Institute of Advanced Industrial Science and Technology (AIST)

抄録

We demonstrated that a moth-eye surface pattern on the luminous inorganic glass could enhance the photoluminescence (PL) intensity notably. A moth-eye pattern of a square array of cones at pitch of 250 nm was fabricated on Eu3+-doped MgF2–MgO–BaO–B2O3 glass by thermal nanoimprinting at 520°C. A simulation with rigorous coupled-wave analysis demonstrated that the surface structure could reduce the surface reflectance in the optical input for the excitation wavelength λ of 405 nm, i.e., −1.1% for p-polarized light, 10.6% for s-polarized light, and 4.1% for non-polarized light in total of a half round angle for the irradiation from a surface light source. The angularly dependent PL of the excitation angle on the nanoimprinted glass was measured by an excitation of UV laser diode (λ = 405 nm). The enhancements of ∼0% for p-polarized light and ∼9% for s-polarized light were observed at the incident angle = 5°.

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