The optical transmission of LiNbO3 single crystals has been measured in the wavelength range 200–900 nm, for different degrees of reduction, to study the effect of reduction on the optical characteristics of LiNbO3 near the fundamental absorption edge. The optical transitions in LiNbO3 were found to be indirect and the band gap decreased with increasing degree of reduction. The band observed at 2.48 eV in the absorption spectrum in heavily reduced samples has been attributed to the formation of polarons, and the theoretical model of Reik and Heese [J. Chem. Solids 28, 581 (1967)] for small polarons is used to correlate the optical and electrical properties.
REFERENCES
1.
A.
Ashkin
, G. D.
Boyd
, J. M.
Dziedzic
, R. G.
Smith
, A. A.
Ballmann
, J. J.
Levinstein
, and K.
Nassau
, Appl. Phys. Lett.
9
, 72
(1966
).2.
K.
Nassau
, H. J.
Levinstein
, and G. M.
Loiacono
, J. Phys. Chem. Solids
27
, 989
(1966
).3.
L. M.
Guseva
, V. P.
Klyev
, I. Z.
Rez
, S. A.
Fedulov
, A. P.
Lyubimov
, and Z. I.
Tatarov
, Bull. Phys. Ser.
31
, 1181
(1967
).4.
5.
A.
Ishida
, O.
Mikami
, S.
Miyazawa
, and M.
Sumi
, Appl. Phys. Lett.
21
, 192
(1972
).6.
J. J.
Amodei
, W.
Phillips
, and D. L.
Staebler
, Appl. Opt.
11
, 390
(1972
).7.
8.
A. M. Glass, G. E. Peterson, and T. J. Negran, in Laser Induced Damage in Optic Materials, Natl. Bur. Stand. Spec. Publ. No. 372, edited by A. J. Glass (U.S. GPO, Washington DC, 1972), p. 15.
9.
M. G.
Clark
, F. J.
DiSalvo
, A. M.
Glass
, and G. E.
Peterson
, J. Chem. Phys.
59
, 6029
(1973
).10.
11.
12.
Y.
Ohmori
, Y.
Yasojima
, and Y.
Inuishi
, Jpn. J. Appl. Phys.
14
, 1291
(1975
).13.
14.
O. F.
Schirmer
and D.
Von der Linde
, Appl. Phys. Lett.
33
, 35
(1978
).15.
K. G.
Bebalaev
, V. B.
Markov
, and S. G.
Odulov
, Sov. Phys. Solid State
20
, 1458
(1978
).16.
A. Rauber, in Current Topics in Material Science, edited by E. Kaldis (North‐Holland, Amsterdam, 1978), Vol. 1, p. 481.
17.
J. L.
Ketchum
, K. I.
Sweeney
, L. E.
Halliburton
, and A. F.
Armington
, Phys. Lett. A
94
, 450
(1983
).18.
K. L.
Sweeney
and L. E.
Halliburton
, Appl. Phys. Lett.
43
, 336
(1983
).19.
L.
Arizmendi
, J. M.
Cabrera
, and F.
Agullo‐Lopez
, J. Phys. C
17
, 515
(1984
).20.
H.
Jhans
, J. M.
Honig
, and C. N. R.
Rao
, J. Phys. C
19
, 3649
(1986
).21.
P. Nagels, in The Hall Effect and its Applications, edited by C. L. Chien and C. R. Westgate (Plenum, New York, 1979), p. 253.
22.
23.
O. S. Heavens, Optical Properties of Thin Solid Films (Dover, New York, 1965).
24.
W.
Horig
, H.
Neumann
, and H.
Sobotta
, Thin Solid Films
48
, 67
(1978
).25.
26.
M. E. Lines and A. M. Glass, Principles and Applications of Ferroelectrics and Related Materials (Oxford University, New York, 1977).
27.
28.
A. Dhar, Ph.D. thesis, University of Delhi (1987).
29.
30.
31.
G. E.
Peterson
, J. R.
Carruthers
, and A.
Carnevale
, J. Chem. Phys.
53
, 2436
(1970
).32.
33.
34.
This content is only available via PDF.
© 1990 American Institute of Physics.
1990
American Institute of Physics
You do not currently have access to this content.