Optical and electronic properties of undoped La2Be2O5 single crystals in the far ultraviolet energy range / Pustovarov Vladimir A.,Ogorodnikov Igor N.,Ospanbekov Erbol A. // JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS. - 2015. - V. 32, l. 2. - P. 241-247.

ISSN/EISSN:

0740-3224 / 1520-8540

Type:

Article

Abstract:

The optical and electronic properties of undoped La2Be2O5 single crystals were determined using low-temperature (T = 10 K) far ultraviolet (4.9-33 eV) synchrotron radiation spectroscopy, optical absorption spectroscopy (T = 80 and 320 K), and calculations for the dispersions of the optical functions. On the basis of the obtained data we determined the Urbach's formula parameters and the cut-off energy E-c = 5.49 eV at 80 K for the low-energy tail of the host absorption, the bandgap E-g = 6.78 eV at 10 K, the energy threshold for the creation of unrelaxed excitons E-ex = 6.28 eV, and other electronic properties. (C) 2015 Optical Society of America

Author keywords:

LANTHANUM BERYLLATE; SPECTROSCOPIC PROPERTIES; LUMINESCENCE; GROWTH

DOI:

10.1364/JOSAB.32.000241

Web of Science ID:

ISI:000349288300008

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	OPTICAL SOC AMER
Address	2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
Language	English
EISSN	1520-8540
Keywords-Plus	LANTHANUM BERYLLATE; SPECTROSCOPIC PROPERTIES; LUMINESCENCE; GROWTH
Research-Areas	Optics
Web-of-Science-Categories	Optics
Author-Email	i.n.ogorodnikov@urfu.ru
ResearcherID-Numbers	Ogorodnikov, Igor/B-4162-2011
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation, Russia; HASYLAB DESY, Germany {[}20110843]
Funding-Text	The authors are grateful to V. N. Matrosov for providing the samples examined, and A. A. Maslakov for assistance in the optical absorption measurements. This work was partly supported by the Ministry of Education and Science of the Russian Federation, Russia (the basic part of the government mandate), and HASYLAB DESY, Germany (Project No. 20110843).
Number-of-Cited-References	33
Journal-ISO	J. Opt. Soc. Am. B-Opt. Phys.
Doc-Delivery-Number	CB0AY