Abstract
Data on spectra of short-lived optical absorption (SLOA) and luminescence induced in congruent crystals of lithium niobate by a pulsed electron beam (0.25 MeV, 20 ns, 15–160 mJ/cm2) in a temperature range of 80 to 350 K are presented. Anisotropic bands with maxima at 1.6 and 4.0 eV, originating from the capture of one and two conduction electrons by an (NbNb-NbLi) complex, respectively, and weakly polarized bands at 2.5 and 3.3 eV due to holes located at Li and Nb vacancies are identified in the structure of SLOA spectra. Cathodoluminescence (CL) of lithium niobate crystals is characterized by fast (τ<4 ns) decay and a broad spectrum, which contains the same bands as the SLOA spectra. It is shown that the change in the initial amount of defects in reduced crystals at 830 K results in an identical change in both the CL and SLOA spectra. A model which treats the luminescence as the result of radiative nonphonon transitions that accompany the thermalization of charge carriers captured into the ground state of a polaron is discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
O. F. Schirmer, O. Thiemann, and M. J. Wohlecke, Phys. Chem. Solids 52(1), 185 (1991).
O. F. Schirmer and D. von der Linde, Appl. Phys. Lett. 33(1), 35 (1978).
L. E. Halliburton, K. L. Sweeney, and C. Y. Chen, Nucl. Instrum. Methods Phys. Res. B 1, 344 (1984).
L. Arizmendi, J. M. Cabrera, and F. J. Agulló-L’opez, J. Phys. C 17, 515 (1984).
A. García-Cabañes, J. A. Sanz-García, J. M. Cabrera, et al., Phys. Rev. B 37(11), 6085 (1988).
J. L. Ketchum, K. L. Sweeney, L. E. Halliburton, and A. F. Armington, Phys. Lett. A 94, 450 (1983).
J. Koppitz, O. F. Schirmer, and A. I. Kuznetsov, Europhys. Lett. 4, 1055 (1987).
D. M. Smyth, Ferroelectrics 50, 93 (1983).
I. Sh. Akhmadullin, V. A. Golinishchev-Kutuzov, and S. A. Migachev, Fiz. Tverd. Tela (St. Petersburg) 40(6), 1109 (1998) [Phys. Solid State 40, 1012 (1998)].
J. Llopis, C. Ballesteros, R. Gonzáles, and Y. Chen, J. Appl. Phys. 56(2), 460 (1984).
D. M. Krol, G. Blasse, and R. C. Powell, J. Chem. Phys. 73, 163 (1980).
M. V. Fok, Tr. Fiz. Inst. Akad. Nauk SSSR 59, 3 (1972).
Yu. R. Zakis, L. N. Kantorovich, E. A. Kotomin, V. N. Kuzovkov, I. A. Tale, and A. L. Shlyuger, Model of Processes in Wide-Gap Solids with Defects (Zinatne, Riga, 1991).
O. F. Schirmer, Z. Phys. B 24, 235 (1976).
Polarons, Ed. by Yu. A. Firsov (Nauka, Moscow, 1975).
Author information
Authors and Affiliations
Additional information
__________
Translated from Fizika Tverdogo Tela, Vol. 43, No. 8, 2001, pp. 1520–1524.
Original Russian Text Copyright © 2001 by Yakovlev, Kabanova, Weber, Paufler.
Rights and permissions
About this article
Cite this article
Yakovlev, V.Y., Kabanova, E.V., Weber, T. et al. Short-lived color and luminescence centers in LiNbO3 crystals irradiated by pulsed electron beams. Phys. Solid State 43, 1580–1584 (2001). https://doi.org/10.1134/1.1395107
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1395107