Fluorescence Line Narrowing Studies of Eu3+-Doped Silica Gel-Glasses

1994 ◽  
Vol 346 ◽  
Author(s):  
M. J. Lochhead ◽  
K. L. Bray
Keyword(s):  
Rare Earth ◽  
Sol Gel ◽  
Rare Earth Ions ◽  
Limiting Factor ◽  
Site Symmetry ◽  
Rare Earth Ion ◽  
Time Resolved ◽  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing

ABSTRACTBroadband fluorescence and fluorescence line narrowing (FLN) spectra are presented for Eu3+ ions in Eu2O3-SiO3 and Eu2O3-Al2O3-SiO3 systems prepared by the sol-gel process. Clustering of rare earth ions in silica glass can be a limiting factor in the design and engineering of optical device materials. The addition of Al2O3 is known to help disperse rare earth ions in sol-gel silica. In order to develop a more detailed understanding of how Eu3+ is incorporated in these materials, time-resolved, laser-induced FLN studies at 77 K have been performed using a pulsed dye laser to selectively excite subsets of ions in the inhomogeneously broadened 7F0⇆ 5D0 manifold. Fluorescence spectra are discussed in terms of rare earth ion clustering, energy transfer, and bonding site symmetry. It is concluded that Eu3+ ions cluster in sol-gel silica and that the addition of alumina assists in dispersing Eu3+ ions.

Spectroscopic studies of rare-earth ions in glass using fluorescence line narrowing techniques

1976 ◽  
Vol 12-13 ◽  
pp. 729-735 ◽  
Author(s):  
M.J. Weber ◽  
J.A. Paisner ◽  
S.S. Sussman ◽  
W.M. Yen ◽  
L.A. Riseberg ◽  
...  
Keyword(s):  
Rare Earth ◽  
Spectroscopic Studies ◽  
Rare Earth Ions ◽  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing

Time Resolved Fluorescence Line Narrowing in Ytterbium-Doped Inorganic Glasses

1985 ◽  
Vol 61 ◽  
Author(s):  
R. T. Brundage ◽  
W. M. Yen
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing ◽  
Homogeneous Linewidth ◽  
Inorganic Glasses ◽  
Rare Earth Doped

ABSTRACTWe have used time resolved fluorescence line narrowing to study optical dephasing and energy transfer among Yb3+ ions doped in inorganic glasses. We observe for the first time in any rare earth doped glass system a change in the power of the temperature dependence of the homogeneous linewidth of the 2F5/2(1)-2F7/2(1) transition of Yb, 3+ as well as an efficient one-phonon assisted energy transfer process occuring among Yb3+ ions at higher concentration due to a quadrupole-quadrupole coupling of the ions. In this paper we review past studies in rare earth doped gla s systems of these topics and compare them to our observations of Yb3+ in silicate and phesphate glasses.

Time-Resolved Fluorescence Line-Narrowing Studies in LaF3:Pr3+

1975 ◽  
Vol 35 (15) ◽  
pp. 1034-1037 ◽  
Author(s):  
R. Flach ◽  
D. S. Hamilton ◽  
P. M. Selzer ◽  
W. M. Yen
Keyword(s):  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing

Fluorescence line Narrowing Spectroscopy of Germanate Glasses Doped with Eu3+

1999 ◽  
Vol 560 ◽  
Author(s):  
R. Rolli ◽  
G. Samoggia ◽  
A. Speghini ◽  
M. Bettinelli ◽  
M. Montagna ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Germanate Glass ◽  
Time Resolved ◽  
Transfer Processes ◽  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing ◽  
Homogeneous Linewidth ◽  
Selective Decay ◽  
Site Selective

ABSTRACTIn the present paper we report on time-resolved resonant and non-resonant fluorescence line narrowing measurements on a lead germanate glass doped with Eu3+. Site-selective decay curves were measured at low temperature. The results show that energy transfer processes between Eu3+, ions in different sites are not efficient at the doping level under investigation (I mol% Eu2O3). The homogeneous linewidth of the 5D0→47F0transition was measured at room temperature as a function of the excitation energy within the inhomogeneous profile. The linear dependence of the homogeneous linewidth on the excitation energy is discussed.

Local symmetry and Z-scan analysis of ZnSe/Eu3+ doped sol–gel silica hosts

2010 ◽  
Vol 88 (7) ◽  
pp. 493-500 ◽  
Author(s):  
Siby Mathew ◽  
K. V. Arun Kumar ◽  
C. Sudarsanakumar ◽  
V. P.N. Nampoori ◽  
N. V. Unnikrishnan
Keyword(s):  
Rare Earth ◽  
Sol Gel ◽  
Glass Network ◽  
Local Symmetry ◽  
Wide Distribution ◽  
Rare Earth Ions ◽  
Saturable Absorption ◽  
Rare Earth Ion ◽  
Enhanced Absorption ◽  
The Rare Earth

Vibrational state side-band spectral analysis of silica matrices, doped with ZnSe/Eu3+ ions, associated with the excitation transition 7F0→5D2 is used to analyze the local asymmetry of the rare earth ions in the glass host. The large inhomogeneous linewidth for the ZnSe co-doped samples indicates the wide distribution of the Eu3+ ions in the matrix and is related to the flexibility of the local glass network. The fluorescence spectra reveal that the intensity of the characteristic emission of europium increases considerably in the presence of ZnSe particles. This phenomenon can be explained by the energy transfer resulting from electron–hole recombination in the ZnSe to the rare earth ion. Nonlinear optical absorption of the sample is also investigated at a wavelength of 532 nm, using open aperture Z-scan technique. The sample exhibits reversible saturable absorption (RSA), which is found to depend on excitation fluence. RSA is due to the enhanced absorption resulting from the electron dynamics in nano-crystallites.

Fluorescence line narrowing and decay dynamics in sol–gel glasses containing Eu3+

2001 ◽  
Vol 94-95 ◽  
pp. 275-278 ◽  
Author(s):  
A.J. Silversmith ◽  
D.M. Boye ◽  
R.E. Anderman ◽  
K.S. Brewer
Keyword(s):  
Sol Gel ◽  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing ◽  
Gel Glasses
Sign in / Sign up

Export Citation Format

Share Document