Broadband characterization of LiNbO3: Influence of Mg doping

Charlotte Cochard, Thiemo Spielmann, Alexei Halpin, Torsten Granzow

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Optical damage of congruent lithium niobate (LiNbO3) is a long-known problem. A popular method to limit this damage is doping LN with magnesium. Here, the dielectric permittivity of pure and magnesium-doped lithium niobate was characterized depending on the crystal orientation over a broad frequency range: 1 mHz to 0.75 PHz (λ=300 nm), using impedance measurements, quasi-optical free-space characterization, THz time domain spectroscopy (THz-TDS) and ellipsometry. Three different frequency ranges, separated by well identified resonances, are observed: low frequency 'piezoelectric' response, intermediate frequency 'ionic' response and high frequency 'electronic' response. Doping with magnesium influences neither the electronic nor the piezoelectric contribution to the dielectric permittivity, whereas the ionic contributions is strongly affected due to the changes in the defect structure.

Original languageEnglish
Title of host publication2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2017
PublisherIEEE
Number of pages2
ISBN (Electronic)9781509060504, 9781509060498
ISBN (Print)9781509060511
DOIs
Publication statusPublished - 16 Oct 2017
Event42nd International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2017 - Cancun, Quintana Roo, Mexico
Duration: 27 Aug 20171 Sep 2017

Publication series

Name
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference42nd International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2017
CountryMexico
CityCancun, Quintana Roo
Period27/08/171/09/17

Keywords

  • Dielectrics
  • Doping
  • Permittivity
  • Lithium niobate
  • Resonant frequency
  • Optical filters
  • Magnesium

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  • Cite this

    Cochard, C., Spielmann, T., Halpin, A., & Granzow, T. (2017). Broadband characterization of LiNbO3: Influence of Mg doping. In 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2017 [8066974] IEEE. https://doi.org/10.1109/IRMMW-THz.2017.8066974