---
res:
  bibo_abstract:
  - Raman imaging, based on incoherent spontaneous Raman scattering (SR) or coherent
    techniques such as broadband coherent anti-Stokes Raman spectroscopy (BCARS),
    is a powerful tool for visualizing local lattice distortions. It can thus be employed,
    e.g., to identify and visualize ferroelectric (FE) domain walls (DWs). While SR-based
    DW imaging relies on small changes in the intensity or position of Raman peaks
    at the DW, BCARS measurements may detect DW signatures with a drastically increased
    contrast and orders of magnitude faster imaging speed. However, while SR-based
    contrasts can be predicted from existing models, the increased DW contrasts in
    BCARS remain poorly understood. In this work, we develop a first-principles approach
    for the simulation of CARS spectra to investigate the origin of this BCARS signal
    contrast at periodically poled stoichiometric lithium niobate (sPPLN) DWs. Combining
    these atomistic simulations with strain modeling allows us to explore how strain
    affects the CARS signal generation at FE DWs. We then apply polarization-sensitive
    BCARS to image sPPLN DWs for different polarization configurations. Our results
    reveal additional Raman peaks specific to the DWs across all investigated polarization
    combinations, yielding a strong DW-to-bulk contrast that enables in situ identification
    and localization of DWs in two-dimensional BCARS maps. This study demonstrates
    the practical utility of polarization-sensitive BCARS for fast DW imaging and
    provides fundamental insights into the BCARS contrast mechanism in FE materials,
    both in strained regions and in the unstrained bulk.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Robin
      foaf_name: Buschbeck, Robin
      foaf_surname: Buschbeck
  - foaf_Person:
      foaf_givenName: Mike N.
      foaf_name: Pionteck, Mike N.
      foaf_surname: Pionteck
  - foaf_Person:
      foaf_givenName: Naomi
      foaf_name: Herrmann, Naomi
      foaf_surname: Herrmann
  - 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: Susanne C.
      foaf_name: Kehr, Susanne C.
      foaf_surname: Kehr
  - 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/m1xq-rlft
  bibo_issue: '3'
  bibo_volume: 114
  dct_date: 2026^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: 'Ab initio modeling and experimental analysis of contrast in broadband
    coherent anti-Stokes Raman spectroscopy: A case study on ferroelectric domain
    walls@'
...