Stationary and nonstationary absorption in lead silicate glasses with short-range order inversion / Zatsepin A. F.,Kukharenko A. I.,Zatsepin D. A.,Shchapova Yu. V.,Yakovlev V. Yu.,Cholakh S. O.,Zhidkov I. S. // OPTICAL MATERIALS. - 2011. - V. 33, l. 4. - P. 601-606.

ISSN/EISSN:

0925-3467 / нет данных

Type:

Article

Abstract:

The methods of stationary and pulsed absorption spectroscopy were used to study the optical properties of xPbO center dot(1-x)SiO(2) glasses produced by cooling of a molten mixture of chemically pure oxides. The spectral dependence of the absorption in the range of the short-wavelength edge obeys the Urbach rule. As the PbO concentration increases, a red shift of the optical transparency cutoff is observed. At x = 0.45-0.50 the amorphous matrix undergoes a structural inversion, which is due to a transition from a silicate to a lead-oxygen glass-forming network. This transition shows up as an abrupt change in the type of optical transitions, the width of the optical gap E(g), and the Urbach energy E(U). The short-range order inversion in the glass is accompanied by an increase in the atomic correlation radius R(0) characterizing the size of the medium-range order in the system. It was found empirically that R(0) has a linear relationship with a continuum-disorder parameter E(U). It was found that pulsed electron irradiation produces short-lived color centers, which absorb at 1.65 and 2.30 eV. The relaxation of unstable absorption centers is characterized by microsecond kinetics. The nature of unstable absorption centers and their relationship with a short-range order inversion and the structure function of lead atoms have been discussed. The kinetic dependences have been interpreted in the context of a mechanism responsible for diffusion-controlled tunneling recombination of radiation-induced electronic and hole states of the matrix. (C) 2010 Elsevier B.V. All rights reserved.

Author keywords:

Lead silicate glass; Absorption edge; Urbach energy; Tauc gap; Transient absorption OPTICAL-ABSORPTION; STATES

DOI:

10.1016/j.optmat.2010.11.006

Web of Science ID:

ISI:000287629300004

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	OPTICAL-ABSORPTION; STATES
Research-Areas	Materials Science; Optics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Optics
Author-Email	zats@dpt.ustu.ru
ResearcherID-Numbers	Zhidkov, Ivan/L-3543-2013 Zatsepin, Anatoly/L-7335-2016 Kukharenko, Andrey/M-8256-2016 Cholakh, Seif/M-8221-2016 Zatsepin, Dmitry/F-5520-2012
ORCID-Numbers	Zhidkov, Ivan/0000-0001-8727-4730 Zatsepin, Anatoly/0000-0001-9539-2403 Kukharenko, Andrey/0000-0003-3774-6909 Cholakh, Seif/0000-0002-9313-6614
Funding-Acknowledgement	Russian Foundation for Basic Research {[}08-02-01072, 09-02-00493, 09-05-00513]
Funding-Text	This study was supported by the Russian Foundation for Basic Research (projects nos. 08-02-01072, 09-02-00493, and 09-05-00513).
Number-of-Cited-References	20
Usage-Count-Since-2013	20
Journal-ISO	Opt. Mater.
Doc-Delivery-Number	725EZ