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

Результат исследований: Материалы для журналаСтатья

8 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаАнглийский
Страницы (с-по)319-325
Число страниц7
ЖурналJournal of Crystal Growth
Том253
Номер выпуска1-4
DOI
СостояниеОпубликовано - июн 2003

ASJC Scopus subject areas

  • Condensed Matter Physics

Fingerprint Подробные сведения о темах исследования «Luminescence and optical absorption spectra of heavily Mg-doped LiNbO<sub>3</sub> single crystals irradiated by pulsed electron beam». Вместе они формируют уникальный семантический отпечаток (fingerprint).

  • Цитировать