---
res:
  bibo_abstract:
  - Stress plays a crucial role in thin films and layered systems, and thus significantly
    influences the material's electrical, mechanical and (nonlinear) optical responses.
    Despite lithium niobate's wide applicability as a nonlinear optical material,
    the impact of mechanical stress on its nonlinear optical properties is not well
    characterized. In this work, we systematically study both experimentally and theoretically,
    the nonlinear optical responses of thin film lithium niobate (TFLN) single crystals.
    Compressive and tensile stress is applied in our experiment using a piezodriven
    strain cell. We then record the second-harmonic-generated (SHG) response in back-reflection
    geometry, and compare these results to theoretical modeling using density functional
    theory (DFT). Both methods consistently reveal that uniaxial stress induces changes
    of the nonlinear optical susceptibility of certain tensor elements on the order
    of up to 1 pm/(V GPa). The exact value depends on the tensor element that is addressed
    in our SHG analysis, on the crystal orientation, and also whether using compressive
    or tensile stresses. Furthermore, a lowering of the crystal symmetry when applying
    stress along the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>x</a:mi></a:math>
    or <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mi>y</b:mi></b:math>
    crystallographic axes is observed by the appearance of new nonlinear optical tensor
    elements within the strained crystals.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Mike N.
      foaf_name: Pionteck, Mike N.
      foaf_surname: Pionteck
  - foaf_Person:
      foaf_givenName: Matthias
      foaf_name: Roeper, Matthias
      foaf_surname: Roeper
  - foaf_Person:
      foaf_givenName: Boris
      foaf_name: Koppitz, Boris
      foaf_surname: Koppitz
  - foaf_Person:
      foaf_givenName: Samuel D.
      foaf_name: Seddon, Samuel D.
      foaf_surname: Seddon
  - foaf_Person:
      foaf_givenName: Michael
      foaf_name: Rüsing, Michael
      foaf_surname: Rüsing
      foaf_workInfoHomepage: http://www.librecat.org/personId=22501
    orcid: 0000-0003-4682-4577
  - foaf_Person:
      foaf_givenName: Laura
      foaf_name: Padberg, Laura
      foaf_surname: Padberg
      foaf_workInfoHomepage: http://www.librecat.org/personId=40300
  - foaf_Person:
      foaf_givenName: Christof
      foaf_name: Eigner, Christof
      foaf_surname: Eigner
      foaf_workInfoHomepage: http://www.librecat.org/personId=13244
    orcid: https://orcid.org/0000-0002-5693-3083
  - foaf_Person:
      foaf_givenName: Christine
      foaf_name: Silberhorn, Christine
      foaf_surname: Silberhorn
      foaf_workInfoHomepage: http://www.librecat.org/personId=26263
  - foaf_Person:
      foaf_givenName: Simone
      foaf_name: Sanna, Simone
      foaf_surname: Sanna
  - foaf_Person:
      foaf_givenName: Lukas M.
      foaf_name: Eng, Lukas M.
      foaf_surname: Eng
  bibo_doi: 10.1103/physrevb.111.064109
  bibo_issue: '6'
  bibo_volume: 111
  dct_date: 2025^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/2469-9950
  - http://id.crossref.org/issn/2469-9969
  dct_language: eng
  dct_publisher: American Physical Society (APS)@
  dct_title: Second-order nonlinear piezo-optic properties of single crystal lithium
    niobate thin films@
...