Temperature-dependent evaluation of Nd:LiCAF optical properties as potential vacuum ultraviolet laser material

Yuki Minami, Ren Arita, Marilou Cadatal-Raduban, Minh Hong Pham, Melvin John Fernandez Empizo, Mui Viet Luong, Tatsuhiro Hori, Masahiro Takabatake, Kazuhito Fukuda, Kazuyuki Mori, Kohei Yamanoi, Toshihiko Shimizu, Nobuhiko Sarukura, Kentaro Fukuda, Noriaki Kawaguchi, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We investigate the temperature-dependent optical properties of Nd3+-doped LiCaAlF6 (Nd:LiCAF) in the vacuum ultraviolet (VUV) region. The 172-nm absorption edge does not seem to experience any significant blue shift as temperature is decreased from room temperature down to 30 K. This is confirmed by excitation spectra for the same temperature range. Several energy levels in the excited state configuration are observed. Based on these energy levels, the dominant emission peak at 177 nm is assigned to the allowed dipole transition from the 4f25d configuration of Nd3+ and the 4I11/2 level of the 4f3 ground state configuration. The position of the dominant 177-nm emission peak appears to be fixed across the temperature range considered. Our results suggest that the spectral overlap between the excitation and emission spectra should not increase as temperature is raised, possibly making Nd:LiCAF a potential VUV laser gain medium operating at room temperature.

Original languageEnglish
Pages (from-to)5-8
Number of pages4
JournalOptical Materials
Publication statusPublished - 2016 Aug 1


  • Fluoride
  • Laser gain medium
  • Temperature-dependent evaluation
  • Vacuum ultraviolet spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


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