Effect of optical damage resistant dopants on the dielectric properties of LiNbO3: Insight from broadband impedance spectroscopy and Raman scattering

Charlotte Cochard, Mael Guennou, Thiemo Spielmann, Niels Van Hoof, Alexei Halpin, Torsten Granzow

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Optical damage limits the application range of congruent LiNbO3. This problem is commonly overcome by adding optical-damage-resistant cations. Here, the influence of doping with optical-damage-resistant Mg and Zn on the ionic and piezoelectric contributions to the dielectric permittivity is investigated in a broad frequency range (1 mHz-2 THz). It is shown that the two dopants have radically different influences on the variation of ionic permittivity with doping, in spite of their similarities with respect to the crystallographic structure. Raman spectroscopy reveals that the difference in permittivity can be traced to the effect of Mg and Zn doping on the susceptibility of the phonon modes. Both observations point to differences in the defect incorporation mechanisms.

Original languageEnglish
Article number154105
Number of pages7
JournalJournal of Applied Physics
Volume123
Issue number15
Early online date17 Apr 2018
DOIs
Publication statusPublished - 21 Apr 2018

Fingerprint Dive into the research topics of 'Effect of optical damage resistant dopants on the dielectric properties of LiNbO<sub>3</sub>: Insight from broadband impedance spectroscopy and Raman scattering'. Together they form a unique fingerprint.

  • Cite this