Luminescence and optical absorption spectra of heavily Mg-doped LiNbO3 single crystals irradiated by pulsed electron beam

Ill Won Kim, Soung Soo Yi, V. F. Pichugin, V. Yu Yakovlev, M. S. Dmitriev

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report on the luminescence and optical absorption spectra of the congruent LiNbO3 (LN) and Mg-doped LiNbO3 (MLN) crystals irradiated by a pulsed electron beam. The luminescence of the LN crystal has an asymmetric wide spectrum band with a maximum around 3.2 eV. The luminescence spectrum of a 10 mol% MgO-doped LiNbO3 (MLN-10) crystal exhibits a new intensity peak at 2.4 eV due to an antisite defect, namely Mg displaced to into the Nb site (MgNb). The optical absorption spectrum of LN contains four absorption bands of 1.6, 2.5, 3.2, and 3.6 eV. The bands at 2.5 and 3.2 eV are due to the O2- hole color centers localized nearby cation vacancies, and those of 1.6 and 3.6 eV are due to the electron centers captured by NbLi 5+ antisite defects. The optical absorption spectrum of the MLN-10 crystal displays one supplementary band peaking at 1.0 eV in the infrared region, which is related to the capture of electrons by Mg complexes. The optical density in the hole band rapidly changes with increasing the MgO concentration. The formation efficiency of hole band centers has a maximum value at 6 mol% MgO-doped LiNbO3 (MLN-6) crystal.

Original languageEnglish
Pages (from-to)319-325
Number of pages7
JournalJournal of Crystal Growth
Volume253
Issue number1-4
DOIs
Publication statusPublished - Jun 2003

Keywords

  • A1. Antisite defects
  • A1. Doping MgO:LiNbO single crystal
  • A1. Luminescence
  • A1. Optical absorption spectrum
  • A1. Pulsed electron irradiation

ASJC Scopus subject areas

  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Luminescence and optical absorption spectra of heavily Mg-doped LiNbO<sub>3</sub> single crystals irradiated by pulsed electron beam'. Together they form a unique fingerprint.

  • Cite this