Hydroxyl ion probing transition metal dopants occupying Nb sites in stoichiometric LiNbO3

László Kovács, Laura Kocsor, éva Tichy-Rács, Krisztián Lengyel, László Bencs, Gábor Corradi

Research output: Article

Abstract

Transition metal ion (TM = Fe3+, Cr3+, Ti4+) doped stoichiometric LiNbO3 crystals have been grown by the high temperature top-seeded solution growth and Czochralski methods.Vibrational bands of hydroxyl ions (OH-) have been observed for dopants above a threshold concentration at wavenumbers of 3502 cm-1 for Fe3+ and Cr3+, and 3486 cm-1 for Ti4+. The absorption bands have been attributed to the stretching vibration of OH- ions in Mn+ Nb - OH- type complexes, where the dopant M occupies a Nb site. The observed vibrational frequencies of the OH- ions and their polarization dependences agree well with the model established for LiNbO3 doped with optical damage resistant (Mg2+, Zn2+, In3+, Sc3+, Hf4+, Zr4+, Sn4+) and rare-earth ions (Nd3+, Er3+, Yb3+), confirming its general validity.

Original languageEnglish
Pages (from-to)4506-4516
Number of pages11
JournalOptical Materials Express
Volume9
Issue number12
DOIs
Publication statusPublished - jan. 1 2019

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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