Short-lived excited states of oxygen-deficient centers in amorphous SiO2 / Zatsepin A,Kortov VS,Fitting HJ // JOURNAL OF NON-CRYSTALLINE SOLIDS. - 2005. - V. 351, l. 10-11. - P. 869-876.

ISSN/EISSN:

0022-3093 / нет данных

Type:

Article

Abstract:

Samples of two pure silica glasses have been investigated by high-power pulsed cathodoluminescence as well as by synchrotron-photoluminescence and photoluminescence excitation spectroscopy with respect to the association of excitation and absorption bands to respective emission bands and the lifetime of excited defect states. The several types of structurally non-equivalent centers of the oxygen-deficient center (ODC) type were detected. The germanium related oxygen-deficient center shows luminescent bands at 3.1 and 4.3 eV. It is shown that both the radiative transitions of the GeODC center are really interconnected by excitation and lifetime. The presence of the silicon related SiODC with a luminescent band at 4.5 eV is established on the basis of characteristic decay time. The different schemes of radiative and non-radiative transitions for excited Ge- and Si-related ODCs are discussed. The conclusion is made that the model of twofold coordinated Si and Ge atoms in silica glasses does not provide an adequate description of the fast relaxation of ODCs. Possible conversion mechanisms of short-living excited ODC-states are considered using an anomalous relaxation model for a neutral diamagnetic oxygen vacancy. \© 2005 Elsevier B.V. All rights reserved.

Author keywords:

SILICON DIOXIDE; ION-IMPLANTATION; VITREOUS SILICA; OPTICAL FIBERS; ALPHA-QUARTZ; GLASSY SIO2; CATHODOLUMINESCENCE; LUMINESCENCE; DEFECTS; VACANCY

DOI:

10.1016/j.jnoncrysol.2005.01.0

Web of Science ID:

ISI:000228953100012

Соавторы в МНС:

Другие поля

Поле	Значение
Month	APR 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	SILICON DIOXIDE; ION-IMPLANTATION; VITREOUS SILICA; OPTICAL FIBERS; ALPHA-QUARTZ; GLASSY SIO2; CATHODOLUMINESCENCE; LUMINESCENCE; DEFECTS; VACANCY
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Ceramics; Materials Science, Multidisciplinary
Author-Email	hans-joachim.fitting@physik.uni-rostock.de
ORCID-Numbers	Zatsepin, Anatoly/0000-0001-9539-2403
Number-of-Cited-References	24
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	15
Journal-ISO	J. Non-Cryst. Solids
Doc-Delivery-Number	924BH