When Eu2O3 powder compact and film are irradiated with ultraviolet (UV) laser light in a vacuum, their photoluminescence (PL) spectra change from a red sharp-line structure to a white broad band, which can be clearly seen with the naked eye. After removing the UV laser light, the white PL continues for more than several months at room temperature under room light, in spite of any changes of atmosphere. By irradiating with the same UV laser light at room temperature under O2 gas atmosphere, the original red PL state reappears. Such a reversible phenomenon may well yield materials for white-light-emitting devices and erasable optical storage.

1.
E.
Bezig
and
J. K.
Trautman
,
Science
257
,
189
(
1992
).
Google Scholar
 
2.
B.
Welber
,
J. Appl. Phys.
36
,
2744
(
1965
).
Google Scholar
 
3.
W.
Beck
,
A. Ya.
Karasik
,
J.
Arvanitidis
, and
D.
Richard
,
Eur. Phys. J. D
10
,
131
(
2000
).
Google Scholar
 
4.
K.
Miura
,
J.
Qui
,
T.
Mitsuyu
, and
K.
Hirao
,
Proc. SPIE
3618
,
141
(
1999
).
Google Scholar
 
5.
V.
Barbin
,
J. P.
Jouart
, and
Th.
D’Almeida
,
Chem. Geol.
130
,
77
(
1996
).
Google Scholar
 
6.
K.
Fujita
,
K.
Tanaka
,
K.
Yamashita
, and
K.
Hirao
,
J. Lumin.
87–89
,
682
(
2000
).
Google Scholar
 
7.
K. A. Gschneid, Jr. and L. R. Eyring, Handbook on the Physics and Chemistry on Rare Earths (North-Holland, Amsterdam, 1979), Vol. 3.
8.
S.
Mochizuki
,
Y.
Suzuki
R.
Uno
M.
Faucher
O. K.
Moune
J.
Dexpert-Ghys
, and
Y.
Zihn
,
Meeting Abstracts Phys. Soc. Jpn.
55
,
627
(
2000
).
Google Scholar
 
9.
G.
Wakefield
,
H. A.
Keron
,
P. J.
Dobson
, and
J. L.
Hutchison
,
J. Colloid Interface Sci.
215
,
179
(
1999
).
Google Scholar
 
10.
G.
Guntherodt
and
P.
Wachter
,
AIP Conf. Proc.
10
,
1284
(
1973
).
Google Scholar
 
11.
M.
Akiyama
,
C.
Xu
,
K.
Nonaka
, and
T.
Watanabe
,
Appl. Phys. Lett.
73
,
3046
(
1998
).
Google Scholar
 
12.
T.
Takasaki
,
S.
Tanabe
, and
T.
Harada
,
J. Ceram. Soc. Jpn.
104
,
322
(
1996
).
Google Scholar
 
13.
T.
Matsuzawa
,
Y.
Aoki
,
N.
Takeuchi
, and
Y.
Murayama
,
J. Electrochem. Soc.
143
,
2670
(
1996
).
Google Scholar
 
14.
Y.
Kawabe
,
A.
Yamanaka
,
E.
Hanamura
,
T.
Kimura
,
Y.
Takiguchi
,
H.
Kan
, and
Y.
Tokura
,
J. Appl. Phys.
88
,
1175
(
2000
).
Google Scholar
 
15.
J. E.
Lennard-Jones
,
Trans. Faraday Soc.
28
,
333
(
1932
).
Google Scholar
 
16.
G. Herzberg, I. Spectra of Diatomic Molecules, p. 351, p. 446, 1989.
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