Spectral hole burning in sol-gel-derived Eu3+-doped film

The sol-gel technique was applied to the preparation of Eu3+ ion–doped films, which showed persistent spectral hole burning. A gel film of ∼3500-nm thickness was prepared by dip-coating of the solution synthesized from Si(OC2H5)4, CH3Si(OC2H5)3, Eu(NO3)3 · 6H2O, and hydropropyl-cellulose. The spectral hole was burned in the 7F0 → 5D0 transition band of the Eu3+ ions at 7 K, the depth of which was 24% of the total fluorescence intensity and decreased as the heat-treatment temperature of film increased. It was found that the hole was thermally filled and erased above ∼170 K; the temperature at which the hole was erased was lower for the film heated at high temperature.

Download Full-text

Room temperature persistent spectral hole burning of Eu3+ ions doped in sol–gel derived glasses

Journal of Luminescence ◽

10.1016/s0022-2313(02)00282-x ◽

2002 ◽

Vol 98 (1-4) ◽

pp. 289-294 ◽

Cited By ~ 6

Author(s):

Masayuki Nogami

Keyword(s):

Room Temperature ◽

Sol Gel ◽

Hole Burning ◽

Spectral Hole Burning ◽

Spectral Hole

Download Full-text

Persistent spectral hole burning and local structure of Eu3+ ions doped in BaO–PbO–P2O5 glasses

Journal of Materials Research ◽

10.1557/jmr.1999.0509 ◽

1999 ◽

Vol 14 (9) ◽

pp. 3759-3764 ◽

Cited By ~ 3

Author(s):

Shunsuke Ito ◽

Tomokatsu Hayakawa ◽

Toshihiro Kasuga ◽

Masayuki Nogami

Keyword(s):

Local Structure ◽

Glass Composition ◽

Hole Burning ◽

Spectral Hole Burning ◽

Spectral Hole ◽

Line Narrowing ◽

Fluorescence Line ◽

Fluorescence Line Narrowing ◽

The Eu

Persistent spectral hole burning was observed in Eu3+-doped BaO–PbO–P2O5 glasses, and the dependence of hole properties on the glass composition was investigated in relation to the local structure surrounding the Eu3+ ions. The hole was burned on the 7F0 → 5D0 transition of the Eu3+ ions, the depth of which decreased with increasing PbO content, whereas the hole width increased. The hole was burned at 6 K, filled on increase in temperature, and erased above 120 K. Judd–Ofelt parameters and fluorescence line-narrowing spectra indicated that the symmetry of the Eu3+ site increases and the covalency of the Eu–O bond decreases with increasing PbO content.

Download Full-text

Sm2+-doped silicate glasses: sol-gel processing and persistent spectral hole burning

10.1117/12.279162 ◽

1997 ◽

Cited By ~ 1

Author(s):

Masayuki Nogami ◽

Yoshihiro Abe

Keyword(s):

Sol Gel ◽

Silicate Glasses ◽

Hole Burning ◽

Spectral Hole Burning ◽

Spectral Hole ◽

Gel Processing

Download Full-text

Sol-Gel processing of Sm2+-doped glass and its spectral hole burning at room temperature

Journal of Sol-Gel Science and Technology ◽

10.1007/bf02436952 ◽

1997 ◽

Vol 8 (1-3) ◽

pp. 867-870

Author(s):

Masayuki Nogami ◽

Yoshihiro Abe

Keyword(s):

Room Temperature ◽

Sol Gel ◽

Hole Burning ◽

Spectral Hole Burning ◽

Spectral Hole ◽

Doped Glass ◽

Gel Processing

Download Full-text

Redox equilibrium and spectral hole burning in Sm2+-doped Al2O3–SiO2 glasses

Journal of Materials Research ◽

10.1557/jmr.2002.0304 ◽

2002 ◽

Vol 17 (8) ◽

pp. 2053-2058 ◽

Cited By ~ 10

Author(s):

Masayuki Nogami ◽

Toyonori Eto ◽

Kazuhiro Suzuki ◽

Tomokatsu Hayakawa

Keyword(s):

Electron Transfer ◽

Sol Gel ◽

Hole Burning ◽

Spectral Hole Burning ◽

Oxygen Defect ◽

Redox Equilibrium ◽

Defect Center ◽

X Ray ◽

Spectral Hole ◽

Gel Glasses

Sm2+ ion-doped Al2O3–SiO2 glasses were prepared using sol-gel and melt-quenching methods; the redox equilibrium and spectral hole burning were investigated. The Sm3+ ions were reduced into Sm2+ by heating in H2 gas or x-ray irradiation. The redox between the Sm3+ and Sm2+ obeyed first-order kinetics, the rate of which was larger for the sol-gel glasses. The Sm3+ ions were also reduced by x-ray irradiation and the activation energy for redox equilibrium was half of that for the glasses treated in H2 gas. Two different mechanisms were proposed for the redox reaction of the samarium ions. In the x-ray irradiated glasses, the Sm3+ ions were reduced into Sm2+ by electron transfer from the oxygen defect center, whereas the H2-gas reaction removed the oxygen ions to reduce the Sm3+ ions. The spectral hole burning of the x-ray-irradiated glasses could be burned by the reverse reaction of the reduction of the Sm3+ ions; that is, the electron transfer from the excited Sm2+ into the surrounding oxygen. A short distance between the Sm2+ and oxygen defect centers allowed fast hole burning. On the other hand, the hole burning in the H2-treated glasses was performed by electron transfer between Sm2+ and another trapping center such as Sm3+.

Download Full-text