We have used the light‐induced grating erasure technique to measure the photorefractive properties of pure and iron doped BaTiO3. Our experiments were performed using an anisotropic configuration which forbids beam coupling and self‐diffraction between the writing beams, resulting in plane parallel intensity fringes that do not change with time. This allowed direct measurement of the charge transport processes without any feedback on the grating due to wave‐mixing processes. The results from these experiments show that the photorefractive parameters known as the trap density Npr and the mobility‐recombination time product μτr, vary with intensity and are not material constants.
REFERENCES
1.
J.
Feinberg
, D.
Heiman
, A. R.
Tariguay
, Jr., and R. W.
Heliwarth
, J. Appl. Phys.
51
, 1297
(1980
).2.
3.
4.
E.
Kratzig
, F.
Welz
, R.
Orlowski
, V.
Doorman
, and M.
Rosenkranz
, Solid State Commun.
34
, 817
(1980
).5.
6.
M.
Carrascosa
and F.
Agullo‐Lopez
, IEEE J. Quantum Electron.
22
, 1369
(1986
).7.
8.
9.
G. A.
Brest
, R. A.
Motes
, and J. R.
Rotge
, J. Opt. Soc. Am. B
5
, 1879
(1988
).10.
S. I.
Stepanov
, M. P.
Petrov
, and A. A.
Kashilin
, Sov. Tech. Phys. Lett.
3
, 345
(1977
).11.
N. V.
Kukhtarev
, E.
Kratzig
, H. C.
Kulich
, and R. A.
Rupp
, Appl. Phys. B.
35
, 17
(1984
).12.
13.
J. Feinberg, in Phase Conjugate Optics, edited by R. Fisher (Academic, New York, 1984), Chap. 11.
14.
15.
P. G.
Schunemann
, D. A.
Temple
, R. S.
Hathcock
, H. L.
Tuller
, H. P.
Jenssen
, D. R.
Gabbe
, and C.
Warde
, J. Opt. Soc. B.
5
, 1685
(1988
).16.
Beam coupling was measured in these samples by the authors and will be described in more detail in a future publication.
17.
A. Rose, Concepts in Photoconductivity and Allied Problems (Krieger, Huntington, NY, 1978).
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.
