---
_id: '66939'
abstract:
- lang: eng
  text: "Many quantum optical applications in spectroscopy, communication and signal
    analysis rely on spectrally-engineered nonlinear optical interactions to target
    specific wavelengths or bandwidth. Here, in an established material platform like
    lithium niobate the achievable wavelength and bandwidth combinations are usually
    limited by the material’s dispersion and its birefringence. In this regard, mixed
    crystals of lithium niobate tantalate (LNT) promise a novel material platform,
    because they allow tuning the birefringence, which is central for type II phase
    matching devices. Crucially, LNT offers crystal  compositions without any birefringence,
    which still retain their second-order optical nonlinearity. Despite recent progress
    in the growth and fabrication of LNT, so far no works have investigated the unique
    properties of LNT for use in electro-optics, nonlinear or quantum optics. In this
    study, we explore nonlinear optical devices based on LNT for broad- and narrowband
    nonlinear optical interactions based on recently measured Sellmeier coefficients.
    Most interestingly, we find that compositions without birefringence allow the
    design of broadband, degenerate type II phase matching sources spanning the whole
    near- to mid-infrared range by only changing the poling period and pump wavelength.
    Such devices are not easily realizable in pure lithium niobate or lithium tantalate.
    This could potentially allow for\tmore flexible light sources and nonlinear devices
    in quantum metrology, quantum spectroscopy and quantum communication."
article_number: '2668'
article_type: original
author:
- first_name: Franz
  full_name: Roeder, Franz
  id: '88149'
  last_name: Roeder
- first_name: Michael
  full_name: Rüsing, Michael
  id: '22501'
  last_name: Rüsing
  orcid: 0000-0003-4682-4577
- first_name: Tobias
  full_name: Hehemann, Tobias
  last_name: Hehemann
- first_name: Abira
  full_name: Gnanavel, Abira
  id: '81424'
  last_name: Gnanavel
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Mirco
  full_name: Imlau, Mirco
  last_name: Imlau
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  ama: 'Roeder F, Rüsing M, Hehemann T, et al. Lithium niobate tantalate mixed crystals:
    a versatile platform for nonlinear quantum processes. <i>Optical Materials Express</i>.
    2026;16(8). doi:<a href="https://doi.org/10.1364/ome.592892">10.1364/ome.592892</a>'
  apa: 'Roeder, F., Rüsing, M., Hehemann, T., Gnanavel, A., Eigner, C., Brecht, B.,
    Imlau, M., &#38; Silberhorn, C. (2026). Lithium niobate tantalate mixed crystals:
    a versatile platform for nonlinear quantum processes. <i>Optical Materials Express</i>,
    <i>16</i>(8), Article 2668. <a href="https://doi.org/10.1364/ome.592892">https://doi.org/10.1364/ome.592892</a>'
  bibtex: '@article{Roeder_Rüsing_Hehemann_Gnanavel_Eigner_Brecht_Imlau_Silberhorn_2026,
    title={Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear
    quantum processes}, volume={16}, DOI={<a href="https://doi.org/10.1364/ome.592892">10.1364/ome.592892</a>},
    number={82668}, journal={Optical Materials Express}, publisher={Optica Publishing
    Group}, author={Roeder, Franz and Rüsing, Michael and Hehemann, Tobias and Gnanavel,
    Abira and Eigner, Christof and Brecht, Benjamin and Imlau, Mirco and Silberhorn,
    Christine}, year={2026} }'
  chicago: 'Roeder, Franz, Michael Rüsing, Tobias Hehemann, Abira Gnanavel, Christof
    Eigner, Benjamin Brecht, Mirco Imlau, and Christine Silberhorn. “Lithium Niobate
    Tantalate Mixed Crystals: A Versatile Platform for Nonlinear Quantum Processes.”
    <i>Optical Materials Express</i> 16, no. 8 (2026). <a href="https://doi.org/10.1364/ome.592892">https://doi.org/10.1364/ome.592892</a>.'
  ieee: 'F. Roeder <i>et al.</i>, “Lithium niobate tantalate mixed crystals: a versatile
    platform for nonlinear quantum processes,” <i>Optical Materials Express</i>, vol.
    16, no. 8, Art. no. 2668, 2026, doi: <a href="https://doi.org/10.1364/ome.592892">10.1364/ome.592892</a>.'
  mla: 'Roeder, Franz, et al. “Lithium Niobate Tantalate Mixed Crystals: A Versatile
    Platform for Nonlinear Quantum Processes.” <i>Optical Materials Express</i>, vol.
    16, no. 8, 2668, Optica Publishing Group, 2026, doi:<a href="https://doi.org/10.1364/ome.592892">10.1364/ome.592892</a>.'
  short: F. Roeder, M. Rüsing, T. Hehemann, A. Gnanavel, C. Eigner, B. Brecht, M.
    Imlau, C. Silberhorn, Optical Materials Express 16 (2026).
date_created: 2026-09-02T11:53:45Z
date_updated: 2026-09-02T13:35:22Z
department:
- _id: '288'
- _id: '623'
- _id: '15'
doi: 10.1364/ome.592892
funded_apc: '1'
intvolume: '        16'
issue: '8'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1364/OME.592892
oa: '1'
publication: Optical Materials Express
publication_identifier:
  issn:
  - 2159-3930
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: 'Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear
  quantum processes'
type: journal_article
user_id: '22501'
volume: 16
year: '2026'
...