Challenge and study for developing of novel single crystalline optical materials using micro-pulling-down method

Akira Yoshikawa, Martin Nikl, Georges Boulon, Tsuguo Fukuda

Research output: Contribution to journalArticlepeer-review

175 Citations (Scopus)


Micro-pulling-down (μ-PD) method is a useful tool to search for new materials. This method allows us to prepare single crystalline materials quickly and relatively inexpensively. Grown crystals are of sufficient dimensions for all the necessary characterization by optical and luminescence methods, including photo- and radio-luminescence, decay kinetics and light yield measurements. Recent results obtained for laser and scintillator materials at Pr-doped Y3Al5O12, Lu3Al5O12, YAlO3, Y2SiO5, Lu2SiO5, fluorides like Ce-doped PrF3, mixed binary fluorides AEF2-REF3, (Ce:AE:(Gd,Y)F3, AE = Ba, Sr, Ca) and Yb- and Tm-doped RE2O3 (RE = Y, Lu, Sc) are summarized here. Practical importance of μ-PD method follows also from the shaped crystal growth aspect. It is possible to grow shaped and/or device-size crystals from the melt using a single step process. Recent improvement of μ-PD method makes the quality of μ-PD crystals comparable with those prepared by Czochralski (Cz), Bridgeman, or other classical growth techniques.

Original languageEnglish
Pages (from-to)6-10
Number of pages5
JournalOptical Materials
Issue number1
Publication statusPublished - 2007 Sept


  • Crystal growth from the melt
  • Decay time
  • Emission
  • Fluoride
  • Laser
  • Luminescence
  • Micro-pulling-down method
  • Oxide
  • Scintillator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


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