Czochralski growth of UV-grade CaF2 single crystals using ZnF2 additive as scavenger

J. M. Ko, S. Tozawa, A. Yoshikawa, K. Inaba, T. Shishido, T. Oba, Y. Oyama, T. Kuwabara, T. Fukuda

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

CaF2 single crystals suitable for excimer laser application in the ultraviolet range were grown by the Czochralski method. ZnF2 additive and CF4 gas were successfully used as scavengers for removing the water molecules in the growth environment, which otherwise cause various defects such as subgrain boundaries, bubbles and oxygen-related precipitates in the CaF2 crystal. Czochralski-grown CaF2 crystals had very good crystallinity and a high transmittance in the wavelength range of the ultraviolet laser. The defect structures of colored and colorless CaF2 crystals were compared.

Original languageEnglish
Pages (from-to)243-248
Number of pages6
JournalJournal of Crystal Growth
Volume222
Issue number1-2
DOIs
Publication statusPublished - 2001 Jan

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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