The microscopic interaction parameter for Tm-to-Ho resonant energy transfer in LiYF4


Ozen G. , DIBARTOLO B.

JOURNAL OF PHYSICS-CONDENSED MATTER, vol.13, no.1, pp.195-202, 2001 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 1
  • Publication Date: 2001
  • Doi Number: 10.1088/0953-8984/13/1/320
  • Title of Journal : JOURNAL OF PHYSICS-CONDENSED MATTER
  • Page Numbers: pp.195-202

Abstract

Absorption and luminescence measurements on Tm3+ and Ho3+ ions in LiYF4:Tm3+, LiYF4:Ho3+, and LiYF4:Tm3+, Ho3+ crystals were carried out. The data collected were used to determine the Ho3+ absorption coefficient integral for I-5(8) --> I-5(7) transition, and the integral for the overlap between the normalized Tm3+ luminescence spectrum due to the F-3(4) --> H-3(6) transition and the Ho3+ absorption band due to I-5(8) --> I-5(7) transition. The relevant critical transfer distance (R-0) that gives a measure of the Tm3+-Ho3+ coupling was determined by considering a Forster-type interaction between the ions. It was found to be 22.5 Angstrom at 300 K with the overlap integral 6.8 x 10(-19) cm(5), which is 4.41 times higher at 77 K.