Open AccessWhite emission of Yb^2+:fluoride glasses efficiently excited with near-UV light
Author(s) -
H. Okamoto,
Ken Kasuga,
Yoshihiro Kubota,
N. Nishimura,
Hiromi Kawamoto,
Koichi Miyauchi,
Yasuhiko Shimotsuma,
Kiyotaka Miura
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.022043
Subject(s) - fluoride , materials science , ultraviolet , white light , excited state , optics , barium fluoride , lithium fluoride , emission spectrum , near ultraviolet , quantum efficiency , optoelectronics , spectral line , analytical chemistry (journal) , atomic physics , inorganic chemistry , chemistry , physics , chromatography , astronomy , nuclear physics
Various Yb²⁺-containing fluoride glasses melting under a reductive atmosphere were prepared. The brightest white light emission was observed for an AlF₃-based fluoride glass not containing Hf or Zr. The largest full width at half maximum of the white emission spectra was 202 nm. In addition, incorporation of chloride into the AlF₃-based glass enabled efficient excitation with near-ultraviolet light corresponding to a GaN bandgap of 3.4 eV and the maximum internal quantum efficiency of Yb²⁺: AlF₃-based fluoride glass was 42%.