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.
| Original language | English |
|---|---|
| Pages (from-to) | 1580-1584 |
| Number of pages | 5 |
| Journal | Physics of the Solid State |
| Volume | 43 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1 Aug 2001 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Short-lived color and luminescence centers in LiNbO3 crystals irradiated by pulsed electron beams. / Yakovlev, V. Yu; Kabanova, E. V.; Weber, T.; Paufler, P.
In: Physics of the Solid State, Vol. 43, No. 8, 01.08.2001, p. 1580-1584.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Short-lived color and luminescence centers in LiNbO3 crystals irradiated by pulsed electron beams
AU - Yakovlev, V. Yu
AU - Kabanova, E. V.
AU - Weber, T.
AU - Paufler, P.
PY - 2001/8/1
Y1 - 2001/8/1
N2 - 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.
AB - 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.
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U2 - 10.1134/1.1395107
DO - 10.1134/1.1395107
M3 - Article
VL - 43
SP - 1580
EP - 1584
JO - Physics of the Solid State
JF - Physics of the Solid State
SN - 1063-7834
IS - 8
ER -