UV absorption edge shift by doping alkali fluorides in fluoroaluminate glass

N. Kitamura, K. Fukumi, J. Nishii, M. Makihara, T. Sasaki, N. Ohno

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The effect on transmittance and reflectance in the vacuum ultraviolet (VUV) region by doping alkali fluorides (LiF, NaF and KF) has been investigated in a ternary fluoroaluminate (18BaF2-37CaF2-45AlF3) glass. The absorption edge of the glass obeys the Urbach rule and was shifted monotonically towards higher energies by increasing the concentration of each alkali fluoride. The VUV reflection peak at 11.3 eV was not sensitive to the change of the concentration of dopants. The magnitude of the edge shift was 10-20 times larger than that expected from the additive law on the magnitude of absorption coefficients of the glass and alkali fluorides. An excitonic interaction similar to that observed in mixed crystals of alkali halides is suggested from the monotonic shift toward the absorption edges of the dopants. The weak sensitivity of the reflection peak upon doping supports that the excitonic state lies predominantly around the edge energies.

Original languageEnglish
Pages (from-to)691-694
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume63
Issue number4
DOIs
Publication statusPublished - Apr 1 2002

Fingerprint

Alkalies
Fluorides
fluorides
alkalies
Doping (additives)
Glass
glass
shift
ultraviolet reflection
Vacuum
Alkali halides
vacuum
mixed crystals
alkali halides
transmittance
absorptivity
reflectance
Crystals
fluoroaluminum
energy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

UV absorption edge shift by doping alkali fluorides in fluoroaluminate glass. / Kitamura, N.; Fukumi, K.; Nishii, J.; Makihara, M.; Sasaki, T.; Ohno, N.

In: Journal of Physics and Chemistry of Solids, Vol. 63, No. 4, 01.04.2002, p. 691-694.

Research output: Contribution to journalArticle

Kitamura, N, Fukumi, K, Nishii, J, Makihara, M, Sasaki, T & Ohno, N 2002, 'UV absorption edge shift by doping alkali fluorides in fluoroaluminate glass', Journal of Physics and Chemistry of Solids, vol. 63, no. 4, pp. 691-694. https://doi.org/10.1016/S0022-3697(01)00215-3
Kitamura, N. ; Fukumi, K. ; Nishii, J. ; Makihara, M. ; Sasaki, T. ; Ohno, N. / UV absorption edge shift by doping alkali fluorides in fluoroaluminate glass. In: Journal of Physics and Chemistry of Solids. 2002 ; Vol. 63, No. 4. pp. 691-694.
@article{a690121e50ef41849a6eff86bf0e9a18,
title = "UV absorption edge shift by doping alkali fluorides in fluoroaluminate glass",
abstract = "The effect on transmittance and reflectance in the vacuum ultraviolet (VUV) region by doping alkali fluorides (LiF, NaF and KF) has been investigated in a ternary fluoroaluminate (18BaF2-37CaF2-45AlF3) glass. The absorption edge of the glass obeys the Urbach rule and was shifted monotonically towards higher energies by increasing the concentration of each alkali fluoride. The VUV reflection peak at 11.3 eV was not sensitive to the change of the concentration of dopants. The magnitude of the edge shift was 10-20 times larger than that expected from the additive law on the magnitude of absorption coefficients of the glass and alkali fluorides. An excitonic interaction similar to that observed in mixed crystals of alkali halides is suggested from the monotonic shift toward the absorption edges of the dopants. The weak sensitivity of the reflection peak upon doping supports that the excitonic state lies predominantly around the edge energies.",
author = "N. Kitamura and K. Fukumi and J. Nishii and M. Makihara and T. Sasaki and N. Ohno",
year = "2002",
month = "4",
day = "1",
doi = "10.1016/S0022-3697(01)00215-3",
language = "English",
volume = "63",
pages = "691--694",
journal = "Journal of Physics and Chemistry of Solids",
issn = "0022-3697",
publisher = "Elsevier Limited",
number = "4",

}

TY - JOUR

T1 - UV absorption edge shift by doping alkali fluorides in fluoroaluminate glass

AU - Kitamura, N.

AU - Fukumi, K.

AU - Nishii, J.

AU - Makihara, M.

AU - Sasaki, T.

AU - Ohno, N.

PY - 2002/4/1

Y1 - 2002/4/1

N2 - The effect on transmittance and reflectance in the vacuum ultraviolet (VUV) region by doping alkali fluorides (LiF, NaF and KF) has been investigated in a ternary fluoroaluminate (18BaF2-37CaF2-45AlF3) glass. The absorption edge of the glass obeys the Urbach rule and was shifted monotonically towards higher energies by increasing the concentration of each alkali fluoride. The VUV reflection peak at 11.3 eV was not sensitive to the change of the concentration of dopants. The magnitude of the edge shift was 10-20 times larger than that expected from the additive law on the magnitude of absorption coefficients of the glass and alkali fluorides. An excitonic interaction similar to that observed in mixed crystals of alkali halides is suggested from the monotonic shift toward the absorption edges of the dopants. The weak sensitivity of the reflection peak upon doping supports that the excitonic state lies predominantly around the edge energies.

AB - The effect on transmittance and reflectance in the vacuum ultraviolet (VUV) region by doping alkali fluorides (LiF, NaF and KF) has been investigated in a ternary fluoroaluminate (18BaF2-37CaF2-45AlF3) glass. The absorption edge of the glass obeys the Urbach rule and was shifted monotonically towards higher energies by increasing the concentration of each alkali fluoride. The VUV reflection peak at 11.3 eV was not sensitive to the change of the concentration of dopants. The magnitude of the edge shift was 10-20 times larger than that expected from the additive law on the magnitude of absorption coefficients of the glass and alkali fluorides. An excitonic interaction similar to that observed in mixed crystals of alkali halides is suggested from the monotonic shift toward the absorption edges of the dopants. The weak sensitivity of the reflection peak upon doping supports that the excitonic state lies predominantly around the edge energies.

UR - http://www.scopus.com/inward/record.url?scp=0036532732&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036532732&partnerID=8YFLogxK

U2 - 10.1016/S0022-3697(01)00215-3

DO - 10.1016/S0022-3697(01)00215-3

M3 - Article

AN - SCOPUS:0036532732

VL - 63

SP - 691

EP - 694

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 4

ER -