---
_id: '66941'
abstract:
- lang: eng
  text: Understanding and controlling the optical properties of lithium niobate tantalate
    solid solutions (LiNb1−xTaxO3, 0 ≤ x ≤ 1) is essential for their use in integrated
    quantum and nonlinear photonics. This material system allows for composition-dependent
    tuning of key optical parameters such as refractive indices and birefringence.
    While lithium niobate (LiNbO3, x = 0) and lithium tantalate (LiTaO3, x = 1) are
    well characterized, reliable dispersion data for intermediate compositions remain
    scarce, limiting accurate modeling and refractive index engineering. Here, we
    address this gap by experimentally determining the ordinary and extraordinary
    refractive indices of LiNb1−xTaxO3 over the spectral range of 405 − 1550 nm using
    an interferometric technique. As a result, composition-dependent refractive index
    dispersion and Sellmeier coefficients are derived and discussed in relation to
    previous studies and structural aspects. In particular, a monotonic decrease of
    the ordinary refractive index with increasing Tantalum concentration is observed.
    The present Sellmeier coefficients further allow discussion of zero birefringence
    dispersion and its composition dependence in lithium niobate tantalate.
article_number: '2069'
article_type: original
author:
- first_name: Tobias
  full_name: Hehemann, Tobias
  last_name: Hehemann
- first_name: Niklas
  full_name: Dömer, Niklas
  last_name: Dömer
- first_name: Felix
  full_name: Sauerwein, Felix
  last_name: Sauerwein
- first_name: Michael
  full_name: Rüsing, Michael
  id: '22501'
  last_name: Rüsing
  orcid: 0000-0003-4682-4577
- first_name: Steffen
  full_name: Ganschow, Steffen
  last_name: Ganschow
- first_name: Mirco
  full_name: Imlau, Mirco
  last_name: Imlau
citation:
  ama: Hehemann T, Dömer N, Sauerwein F, Rüsing M, Ganschow S, Imlau M. Composition-dependent
    refractive index dispersion and Sellmeier coefficients for lithium niobate tantalate
    solid solutions. <i>Optical Materials Express</i>. 2026;16(7). doi:<a href="https://doi.org/10.1364/ome.592118">10.1364/ome.592118</a>
  apa: Hehemann, T., Dömer, N., Sauerwein, F., Rüsing, M., Ganschow, S., &#38; Imlau,
    M. (2026). Composition-dependent refractive index dispersion and Sellmeier coefficients
    for lithium niobate tantalate solid solutions. <i>Optical Materials Express</i>,
    <i>16</i>(7), Article 2069. <a href="https://doi.org/10.1364/ome.592118">https://doi.org/10.1364/ome.592118</a>
  bibtex: '@article{Hehemann_Dömer_Sauerwein_Rüsing_Ganschow_Imlau_2026, title={Composition-dependent
    refractive index dispersion and Sellmeier coefficients for lithium niobate tantalate
    solid solutions}, volume={16}, DOI={<a href="https://doi.org/10.1364/ome.592118">10.1364/ome.592118</a>},
    number={72069}, journal={Optical Materials Express}, publisher={Optica Publishing
    Group}, author={Hehemann, Tobias and Dömer, Niklas and Sauerwein, Felix and Rüsing,
    Michael and Ganschow, Steffen and Imlau, Mirco}, year={2026} }'
  chicago: Hehemann, Tobias, Niklas Dömer, Felix Sauerwein, Michael Rüsing, Steffen
    Ganschow, and Mirco Imlau. “Composition-Dependent Refractive Index Dispersion
    and Sellmeier Coefficients for Lithium Niobate Tantalate Solid Solutions.” <i>Optical
    Materials Express</i> 16, no. 7 (2026). <a href="https://doi.org/10.1364/ome.592118">https://doi.org/10.1364/ome.592118</a>.
  ieee: 'T. Hehemann, N. Dömer, F. Sauerwein, M. Rüsing, S. Ganschow, and M. Imlau,
    “Composition-dependent refractive index dispersion and Sellmeier coefficients
    for lithium niobate tantalate solid solutions,” <i>Optical Materials Express</i>,
    vol. 16, no. 7, Art. no. 2069, 2026, doi: <a href="https://doi.org/10.1364/ome.592118">10.1364/ome.592118</a>.'
  mla: Hehemann, Tobias, et al. “Composition-Dependent Refractive Index Dispersion
    and Sellmeier Coefficients for Lithium Niobate Tantalate Solid Solutions.” <i>Optical
    Materials Express</i>, vol. 16, no. 7, 2069, Optica Publishing Group, 2026, doi:<a
    href="https://doi.org/10.1364/ome.592118">10.1364/ome.592118</a>.
  short: T. Hehemann, N. Dömer, F. Sauerwein, M. Rüsing, S. Ganschow, M. Imlau, Optical
    Materials Express 16 (2026).
date_created: 2026-09-02T12:01:19Z
date_updated: 2026-09-02T12:06:36Z
department:
- _id: '288'
- _id: '15'
- _id: '623'
doi: 10.1364/ome.592118
funded_apc: '1'
intvolume: '        16'
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1364/OME.592118
oa: '1'
publication: Optical Materials Express
publication_identifier:
  issn:
  - 2159-3930
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: Composition-dependent refractive index dispersion and Sellmeier coefficients
  for lithium niobate tantalate solid solutions
type: journal_article
user_id: '22501'
volume: 16
year: '2026'
...