---
_id: '60466'
author:
- first_name: Julian
  full_name: Brockmeier, Julian
  id: '44807'
  last_name: Brockmeier
- first_name: Timon
  full_name: Schapeler, Timon
  id: '55629'
  last_name: Schapeler
  orcid: 0000-0001-7652-1716
- first_name: Nina Amelie
  full_name: Lange, Nina Amelie
  id: '56843'
  last_name: Lange
  orcid: 0000-0001-6624-7098
- first_name: Jan Philipp
  full_name: Höpker, Jan Philipp
  id: '33913'
  last_name: Höpker
- first_name: Harald
  full_name: Herrmann, Harald
  id: '216'
  last_name: Herrmann
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Tim
  full_name: Bartley, Tim
  id: '49683'
  last_name: Bartley
citation:
  ama: Brockmeier J, Schapeler T, Lange NA, et al. Harnessing temporal dispersion
    for integrated pump filtering in spontaneous heralded single-photon generation
    processes. <i>New Journal of Physics</i>. Published online 2025. doi:<a href="https://doi.org/10.1088/1367-2630/ade46c">10.1088/1367-2630/ade46c</a>
  apa: Brockmeier, J., Schapeler, T., Lange, N. A., Höpker, J. P., Herrmann, H., Silberhorn,
    C., &#38; Bartley, T. (2025). Harnessing temporal dispersion for integrated pump
    filtering in spontaneous heralded single-photon generation processes. <i>New Journal
    of Physics</i>. <a href="https://doi.org/10.1088/1367-2630/ade46c">https://doi.org/10.1088/1367-2630/ade46c</a>
  bibtex: '@article{Brockmeier_Schapeler_Lange_Höpker_Herrmann_Silberhorn_Bartley_2025,
    title={Harnessing temporal dispersion for integrated pump filtering in spontaneous
    heralded single-photon generation processes}, DOI={<a href="https://doi.org/10.1088/1367-2630/ade46c">10.1088/1367-2630/ade46c</a>},
    journal={New Journal of Physics}, author={Brockmeier, Julian and Schapeler, Timon
    and Lange, Nina Amelie and Höpker, Jan Philipp and Herrmann, Harald and Silberhorn,
    Christine and Bartley, Tim}, year={2025} }'
  chicago: Brockmeier, Julian, Timon Schapeler, Nina Amelie Lange, Jan Philipp Höpker,
    Harald Herrmann, Christine Silberhorn, and Tim Bartley. “Harnessing Temporal Dispersion
    for Integrated Pump Filtering in Spontaneous Heralded Single-Photon Generation
    Processes.” <i>New Journal of Physics</i>, 2025. <a href="https://doi.org/10.1088/1367-2630/ade46c">https://doi.org/10.1088/1367-2630/ade46c</a>.
  ieee: 'J. Brockmeier <i>et al.</i>, “Harnessing temporal dispersion for integrated
    pump filtering in spontaneous heralded single-photon generation processes,” <i>New
    Journal of Physics</i>, 2025, doi: <a href="https://doi.org/10.1088/1367-2630/ade46c">10.1088/1367-2630/ade46c</a>.'
  mla: Brockmeier, Julian, et al. “Harnessing Temporal Dispersion for Integrated Pump
    Filtering in Spontaneous Heralded Single-Photon Generation Processes.” <i>New
    Journal of Physics</i>, 2025, doi:<a href="https://doi.org/10.1088/1367-2630/ade46c">10.1088/1367-2630/ade46c</a>.
  short: J. Brockmeier, T. Schapeler, N.A. Lange, J.P. Höpker, H. Herrmann, C. Silberhorn,
    T. Bartley, New Journal of Physics (2025).
date_created: 2025-06-30T08:58:37Z
date_updated: 2025-12-15T09:21:29Z
department:
- _id: '15'
- _id: '623'
doi: 10.1088/1367-2630/ade46c
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '171'
  name: 'TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher
    Filterung unter Verwendung integrierter supraleitender Detektoren'
publication: New Journal of Physics
status: public
title: Harnessing temporal dispersion for integrated pump filtering in spontaneous
  heralded single-photon generation processes
type: journal_article
user_id: '56843'
year: '2025'
...
---
_id: '48399'
abstract:
- lang: eng
  text: <jats:p>Quantum photonic processing via electro-optic components typically
    requires electronic links across different operation environments, especially
    when interfacing cryogenic components such as superconducting single photon detectors
    with room-temperature control and readout electronics. However, readout and driving
    electronics can introduce detrimental parasitic effects. Here we show an all-optical
    control and readout of a superconducting nanowire single photon detector (SNSPD),
    completely electrically decoupled from room temperature electronics. We provide
    the operation power for the superconducting detector via a cryogenic photodiode,
    and readout single photon detection signals via a cryogenic electro-optic modulator
    in the same cryostat. This method opens the possibility for control and readout
    of superconducting circuits, and feedforward for photonic quantum computing.</jats:p>
article_number: '32717'
author:
- first_name: Frederik
  full_name: Thiele, Frederik
  id: '50819'
  last_name: Thiele
  orcid: 0000-0003-0663-5587
- first_name: Thomas
  full_name: Hummel, Thomas
  id: '83846'
  last_name: Hummel
- first_name: Adam N.
  full_name: McCaughan, Adam N.
  last_name: McCaughan
- first_name: Julian
  full_name: Brockmeier, Julian
  id: '44807'
  last_name: Brockmeier
- first_name: Maximilian
  full_name: Protte, Maximilian
  id: '46170'
  last_name: Protte
- first_name: Victor
  full_name: Quiring, Victor
  last_name: Quiring
- first_name: Sebastian
  full_name: Lengeling, Sebastian
  id: '44373'
  last_name: Lengeling
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Tim
  full_name: Bartley, Tim
  id: '49683'
  last_name: Bartley
citation:
  ama: Thiele F, Hummel T, McCaughan AN, et al. All optical operation of a superconducting
    photonic interface. <i>Optics Express</i>. 2023;31(20). doi:<a href="https://doi.org/10.1364/oe.492035">10.1364/oe.492035</a>
  apa: Thiele, F., Hummel, T., McCaughan, A. N., Brockmeier, J., Protte, M., Quiring,
    V., Lengeling, S., Eigner, C., Silberhorn, C., &#38; Bartley, T. (2023). All optical
    operation of a superconducting photonic interface. <i>Optics Express</i>, <i>31</i>(20),
    Article 32717. <a href="https://doi.org/10.1364/oe.492035">https://doi.org/10.1364/oe.492035</a>
  bibtex: '@article{Thiele_Hummel_McCaughan_Brockmeier_Protte_Quiring_Lengeling_Eigner_Silberhorn_Bartley_2023,
    title={All optical operation of a superconducting photonic interface}, volume={31},
    DOI={<a href="https://doi.org/10.1364/oe.492035">10.1364/oe.492035</a>}, number={2032717},
    journal={Optics Express}, publisher={Optica Publishing Group}, author={Thiele,
    Frederik and Hummel, Thomas and McCaughan, Adam N. and Brockmeier, Julian and
    Protte, Maximilian and Quiring, Victor and Lengeling, Sebastian and Eigner, Christof
    and Silberhorn, Christine and Bartley, Tim}, year={2023} }'
  chicago: Thiele, Frederik, Thomas Hummel, Adam N. McCaughan, Julian Brockmeier,
    Maximilian Protte, Victor Quiring, Sebastian Lengeling, Christof Eigner, Christine
    Silberhorn, and Tim Bartley. “All Optical Operation of a Superconducting Photonic
    Interface.” <i>Optics Express</i> 31, no. 20 (2023). <a href="https://doi.org/10.1364/oe.492035">https://doi.org/10.1364/oe.492035</a>.
  ieee: 'F. Thiele <i>et al.</i>, “All optical operation of a superconducting photonic
    interface,” <i>Optics Express</i>, vol. 31, no. 20, Art. no. 32717, 2023, doi:
    <a href="https://doi.org/10.1364/oe.492035">10.1364/oe.492035</a>.'
  mla: Thiele, Frederik, et al. “All Optical Operation of a Superconducting Photonic
    Interface.” <i>Optics Express</i>, vol. 31, no. 20, 32717, Optica Publishing Group,
    2023, doi:<a href="https://doi.org/10.1364/oe.492035">10.1364/oe.492035</a>.
  short: F. Thiele, T. Hummel, A.N. McCaughan, J. Brockmeier, M. Protte, V. Quiring,
    S. Lengeling, C. Eigner, C. Silberhorn, T. Bartley, Optics Express 31 (2023).
date_created: 2023-10-24T06:43:16Z
date_updated: 2023-11-27T08:43:33Z
doi: 10.1364/oe.492035
intvolume: '        31'
issue: '20'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
  issn:
  - 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: All optical operation of a superconducting photonic interface
type: journal_article
user_id: '50819'
volume: 31
year: '2023'
...
---
_id: '33672'
abstract:
- lang: eng
  text: "<jats:title>Abstract</jats:title>\r\n               <jats:p>Lithium niobate
    is a promising platform for integrated quantum optics. In this platform, we aim
    to efficiently manipulate and detect quantum states by combining superconducting
    single photon detectors and modulators. The cryogenic operation of a superconducting
    single photon detector dictates the optimisation of the electro-optic modulators
    under the same operating conditions. To that end, we characterise a phase modulator,
    directional coupler, and polarisation converter at both ambient and cryogenic
    temperatures. The operation voltage <jats:inline-formula>\r\n                     <jats:tex-math><?CDATA
    $V_{\\pi/2}$?></jats:tex-math>\r\n                     <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"
    overflow=\"scroll\">\r\n                        <mml:msub>\r\n                           <mml:mi>V</mml:mi>\r\n
    \                          <mml:mrow>\r\n                              <mml:mi>π</mml:mi>\r\n
    \                             <mml:mrow>\r\n                                 <mml:mo>/</mml:mo>\r\n
    \                             </mml:mrow>\r\n                              <mml:mn>2</mml:mn>\r\n
    \                          </mml:mrow>\r\n                        </mml:msub>\r\n
    \                    </mml:math>\r\n                     <jats:inline-graphic
    xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"jpphotonac6c63ieqn1.gif\"
    xlink:type=\"simple\" />\r\n                  </jats:inline-formula> of these
    modulators increases, due to the decrease in the electro-optic effect, by 74%
    for the phase modulator, 84% for the directional coupler and 35% for the polarisation
    converter below 8.5<jats:inline-formula>\r\n                     <jats:tex-math><?CDATA
    $\\,\\mathrm{K}$?></jats:tex-math>\r\n                     <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"
    overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                           <mml:mi
    mathvariant=\"normal\">K</mml:mi>\r\n                        </mml:mrow>\r\n                     </mml:math>\r\n
    \                    <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\"
    xlink:href=\"jpphotonac6c63ieqn2.gif\" xlink:type=\"simple\" />\r\n                  </jats:inline-formula>.
    The phase modulator preserves its broadband nature and modulates light in the
    characterised wavelength range. The unbiased bar state of the directional coupler
    changed by a wavelength shift of 85<jats:inline-formula>\r\n                     <jats:tex-math><?CDATA
    $\\,\\mathrm{nm}$?></jats:tex-math>\r\n                     <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"
    overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                           <mml:mi
    mathvariant=\"normal\">n</mml:mi>\r\n                           <mml:mi mathvariant=\"normal\">m</mml:mi>\r\n
    \                       </mml:mrow>\r\n                     </mml:math>\r\n                     <jats:inline-graphic
    xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"jpphotonac6c63ieqn3.gif\"
    xlink:type=\"simple\" />\r\n                  </jats:inline-formula> while cooling
    the device down to 5<jats:inline-formula>\r\n                     <jats:tex-math><?CDATA
    $\\,\\mathrm{K}$?></jats:tex-math>\r\n                     <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"
    overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                           <mml:mi
    mathvariant=\"normal\">K</mml:mi>\r\n                        </mml:mrow>\r\n                     </mml:math>\r\n
    \                    <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\"
    xlink:href=\"jpphotonac6c63ieqn4.gif\" xlink:type=\"simple\" />\r\n                  </jats:inline-formula>.
    The polarisation converter uses periodic poling to phasematch the two orthogonal
    polarisations. The phasematched wavelength of the utilised poling changes by 112<jats:inline-formula>\r\n
    \                    <jats:tex-math><?CDATA $\\,\\mathrm{nm}$?></jats:tex-math>\r\n
    \                    <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"
    overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                           <mml:mi
    mathvariant=\"normal\">n</mml:mi>\r\n                           <mml:mi mathvariant=\"normal\">m</mml:mi>\r\n
    \                       </mml:mrow>\r\n                     </mml:math>\r\n                     <jats:inline-graphic
    xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"jpphotonac6c63ieqn5.gif\"
    xlink:type=\"simple\" />\r\n                  </jats:inline-formula> when cooling
    to 5<jats:inline-formula>\r\n                     <jats:tex-math><?CDATA $\\,\\mathrm{K}$?></jats:tex-math>\r\n
    \                    <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"
    overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                           <mml:mi
    mathvariant=\"normal\">K</mml:mi>\r\n                        </mml:mrow>\r\n                     </mml:math>\r\n
    \                    <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\"
    xlink:href=\"jpphotonac6c63ieqn6.gif\" xlink:type=\"simple\" />\r\n                  </jats:inline-formula>.</jats:p>"
article_number: '034004'
author:
- first_name: Frederik
  full_name: Thiele, Frederik
  id: '50819'
  last_name: Thiele
  orcid: 0000-0003-0663-5587
- first_name: Felix
  full_name: vom Bruch, Felix
  id: '71245'
  last_name: vom Bruch
- first_name: Julian
  full_name: Brockmeier, Julian
  id: '44807'
  last_name: Brockmeier
- first_name: Maximilian
  full_name: Protte, Maximilian
  id: '46170'
  last_name: Protte
- first_name: Thomas
  full_name: Hummel, Thomas
  id: '83846'
  last_name: Hummel
- first_name: Raimund
  full_name: Ricken, Raimund
  last_name: Ricken
- first_name: Viktor
  full_name: Quiring, Viktor
  last_name: Quiring
- first_name: Sebastian
  full_name: Lengeling, Sebastian
  id: '44373'
  last_name: Lengeling
- first_name: Harald
  full_name: Herrmann, Harald
  id: '216'
  last_name: Herrmann
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Tim
  full_name: Bartley, Tim
  id: '49683'
  last_name: Bartley
citation:
  ama: 'Thiele F, vom Bruch F, Brockmeier J, et al. Cryogenic electro-optic modulation
    in titanium in-diffused lithium niobate waveguides. <i>Journal of Physics: Photonics</i>.
    2022;4(3). doi:<a href="https://doi.org/10.1088/2515-7647/ac6c63">10.1088/2515-7647/ac6c63</a>'
  apa: 'Thiele, F., vom Bruch, F., Brockmeier, J., Protte, M., Hummel, T., Ricken,
    R., Quiring, V., Lengeling, S., Herrmann, H., Eigner, C., Silberhorn, C., &#38;
    Bartley, T. (2022). Cryogenic electro-optic modulation in titanium in-diffused
    lithium niobate waveguides. <i>Journal of Physics: Photonics</i>, <i>4</i>(3),
    Article 034004. <a href="https://doi.org/10.1088/2515-7647/ac6c63">https://doi.org/10.1088/2515-7647/ac6c63</a>'
  bibtex: '@article{Thiele_vom Bruch_Brockmeier_Protte_Hummel_Ricken_Quiring_Lengeling_Herrmann_Eigner_et
    al._2022, title={Cryogenic electro-optic modulation in titanium in-diffused lithium
    niobate waveguides}, volume={4}, DOI={<a href="https://doi.org/10.1088/2515-7647/ac6c63">10.1088/2515-7647/ac6c63</a>},
    number={3034004}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing},
    author={Thiele, Frederik and vom Bruch, Felix and Brockmeier, Julian and Protte,
    Maximilian and Hummel, Thomas and Ricken, Raimund and Quiring, Viktor and Lengeling,
    Sebastian and Herrmann, Harald and Eigner, Christof and et al.}, year={2022} }'
  chicago: 'Thiele, Frederik, Felix vom Bruch, Julian Brockmeier, Maximilian Protte,
    Thomas Hummel, Raimund Ricken, Viktor Quiring, et al. “Cryogenic Electro-Optic
    Modulation in Titanium in-Diffused Lithium Niobate Waveguides.” <i>Journal of
    Physics: Photonics</i> 4, no. 3 (2022). <a href="https://doi.org/10.1088/2515-7647/ac6c63">https://doi.org/10.1088/2515-7647/ac6c63</a>.'
  ieee: 'F. Thiele <i>et al.</i>, “Cryogenic electro-optic modulation in titanium
    in-diffused lithium niobate waveguides,” <i>Journal of Physics: Photonics</i>,
    vol. 4, no. 3, Art. no. 034004, 2022, doi: <a href="https://doi.org/10.1088/2515-7647/ac6c63">10.1088/2515-7647/ac6c63</a>.'
  mla: 'Thiele, Frederik, et al. “Cryogenic Electro-Optic Modulation in Titanium in-Diffused
    Lithium Niobate Waveguides.” <i>Journal of Physics: Photonics</i>, vol. 4, no.
    3, 034004, IOP Publishing, 2022, doi:<a href="https://doi.org/10.1088/2515-7647/ac6c63">10.1088/2515-7647/ac6c63</a>.'
  short: 'F. Thiele, F. vom Bruch, J. Brockmeier, M. Protte, T. Hummel, R. Ricken,
    V. Quiring, S. Lengeling, H. Herrmann, C. Eigner, C. Silberhorn, T. Bartley, Journal
    of Physics: Photonics 4 (2022).'
date_created: 2022-10-11T07:14:40Z
date_updated: 2023-01-12T15:16:35Z
department:
- _id: '15'
- _id: '230'
- _id: '623'
doi: 10.1088/2515-7647/ac6c63
intvolume: '         4'
issue: '3'
keyword:
- Electrical and Electronic Engineering
- Atomic and Molecular Physics
- and Optics
- Electronic
- Optical and Magnetic Materials
language:
- iso: eng
publication: 'Journal of Physics: Photonics'
publication_identifier:
  issn:
  - 2515-7647
publication_status: published
publisher: IOP Publishing
status: public
title: Cryogenic electro-optic modulation in titanium in-diffused lithium niobate
  waveguides
type: journal_article
user_id: '83846'
volume: 4
year: '2022'
...
---
_id: '23826'
abstract:
- lang: eng
  text: <jats:p>Potassium titanyl phosphate (KTP) is a nonlinear optical material
    with applications in high-power frequency conversion or quasi-phase matching in
    submicron period domain grids. A prerequisite for these applications is a precise
    control and understanding of the poling mechanisms to enable the fabrication of
    high-grade domain grids. In contrast to the widely used material lithium niobate,
    the domain growth in KTP is less studied, because many standard methods, such
    as selective etching or polarization microscopy, provides less insight or are
    not applicable on non-polar surfaces, respectively. In this work, we present results
    of confocal Raman-spectroscopy of the ferroelectric domain structure in KTP. This
    analytical method allows for the visualization of domain grids of the non-polar
    KTP y-face and therefore more insight into the domain-growth and -structure in
    KTP, which can be used for improved domain fabrication.</jats:p>
article_number: '1086'
author:
- first_name: Julian
  full_name: Brockmeier, Julian
  id: '44807'
  last_name: Brockmeier
- first_name: Peter Walter Martin
  full_name: Mackwitz, Peter Walter Martin
  last_name: Mackwitz
- first_name: Michael
  full_name: Rüsing, Michael
  id: '22501'
  last_name: Rüsing
  orcid: 0000-0003-4682-4577
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Laura
  full_name: Padberg, Laura
  id: '40300'
  last_name: Padberg
- first_name: Matteo
  full_name: Santandrea, Matteo
  id: '55095'
  last_name: Santandrea
  orcid: 0000-0001-5718-358X
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Artur
  full_name: Zrenner, Artur
  id: '606'
  last_name: Zrenner
  orcid: 0000-0002-5190-0944
- first_name: Gerhard
  full_name: Berth, Gerhard
  id: '53'
  last_name: Berth
citation:
  ama: Brockmeier J, Mackwitz PWM, Rüsing M, et al. Non-Invasive Visualization of
    Ferroelectric Domain Structures on the Non-Polar y-Surface of KTiOPO4 via Raman
    Imaging. <i>Crystals</i>. Published online 2021. doi:<a href="https://doi.org/10.3390/cryst11091086">10.3390/cryst11091086</a>
  apa: Brockmeier, J., Mackwitz, P. W. M., Rüsing, M., Eigner, C., Padberg, L., Santandrea,
    M., Silberhorn, C., Zrenner, A., &#38; Berth, G. (2021). Non-Invasive Visualization
    of Ferroelectric Domain Structures on the Non-Polar y-Surface of KTiOPO4 via Raman
    Imaging. <i>Crystals</i>, Article 1086. <a href="https://doi.org/10.3390/cryst11091086">https://doi.org/10.3390/cryst11091086</a>
  bibtex: '@article{Brockmeier_Mackwitz_Rüsing_Eigner_Padberg_Santandrea_Silberhorn_Zrenner_Berth_2021,
    title={Non-Invasive Visualization of Ferroelectric Domain Structures on the Non-Polar
    y-Surface of KTiOPO4 via Raman Imaging}, DOI={<a href="https://doi.org/10.3390/cryst11091086">10.3390/cryst11091086</a>},
    number={1086}, journal={Crystals}, author={Brockmeier, Julian and Mackwitz, Peter
    Walter Martin and Rüsing, Michael and Eigner, Christof and Padberg, Laura and
    Santandrea, Matteo and Silberhorn, Christine and Zrenner, Artur and Berth, Gerhard},
    year={2021} }'
  chicago: Brockmeier, Julian, Peter Walter Martin Mackwitz, Michael Rüsing, Christof
    Eigner, Laura Padberg, Matteo Santandrea, Christine Silberhorn, Artur Zrenner,
    and Gerhard Berth. “Non-Invasive Visualization of Ferroelectric Domain Structures
    on the Non-Polar y-Surface of KTiOPO4 via Raman Imaging.” <i>Crystals</i>, 2021.
    <a href="https://doi.org/10.3390/cryst11091086">https://doi.org/10.3390/cryst11091086</a>.
  ieee: 'J. Brockmeier <i>et al.</i>, “Non-Invasive Visualization of Ferroelectric
    Domain Structures on the Non-Polar y-Surface of KTiOPO4 via Raman Imaging,” <i>Crystals</i>,
    Art. no. 1086, 2021, doi: <a href="https://doi.org/10.3390/cryst11091086">10.3390/cryst11091086</a>.'
  mla: Brockmeier, Julian, et al. “Non-Invasive Visualization of Ferroelectric Domain
    Structures on the Non-Polar y-Surface of KTiOPO4 via Raman Imaging.” <i>Crystals</i>,
    1086, 2021, doi:<a href="https://doi.org/10.3390/cryst11091086">10.3390/cryst11091086</a>.
  short: J. Brockmeier, P.W.M. Mackwitz, M. Rüsing, C. Eigner, L. Padberg, M. Santandrea,
    C. Silberhorn, A. Zrenner, G. Berth, Crystals (2021).
date_created: 2021-09-07T08:09:36Z
date_updated: 2023-10-06T07:40:37Z
department:
- _id: '15'
- _id: '288'
doi: 10.3390/cryst11091086
language:
- iso: eng
publication: Crystals
publication_identifier:
  issn:
  - 2073-4352
publication_status: published
status: public
title: Non-Invasive Visualization of Ferroelectric Domain Structures on the Non-Polar
  y-Surface of KTiOPO4 via Raman Imaging
type: journal_article
user_id: '13244'
year: '2021'
...
---
_id: '25920'
article_number: '24353'
author:
- first_name: Laura
  full_name: Padberg, Laura
  id: '40300'
  last_name: Padberg
- first_name: Matteo
  full_name: Santandrea, Matteo
  id: '55095'
  last_name: Santandrea
  orcid: 0000-0001-5718-358X
- first_name: Michael
  full_name: Rüsing, Michael
  id: '22501'
  last_name: Rüsing
  orcid: 0000-0003-4682-4577
- first_name: Julian
  full_name: Brockmeier, Julian
  id: '44807'
  last_name: Brockmeier
- first_name: Peter
  full_name: Mackwitz, Peter
  last_name: Mackwitz
- first_name: Gerhard
  full_name: Berth, Gerhard
  id: '53'
  last_name: Berth
- first_name: Artur
  full_name: Zrenner, Artur
  id: '606'
  last_name: Zrenner
  orcid: 0000-0002-5190-0944
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  ama: Padberg L, Santandrea M, Rüsing M, et al. Characterisation of width-dependent
    diffusion dynamics in rubidium-exchanged KTP waveguides. <i>Optics Express</i>.
    Published online 2020. doi:<a href="https://doi.org/10.1364/oe.397074">10.1364/oe.397074</a>
  apa: Padberg, L., Santandrea, M., Rüsing, M., Brockmeier, J., Mackwitz, P., Berth,
    G., Zrenner, A., Eigner, C., &#38; Silberhorn, C. (2020). Characterisation of
    width-dependent diffusion dynamics in rubidium-exchanged KTP waveguides. <i>Optics
    Express</i>, Article 24353. <a href="https://doi.org/10.1364/oe.397074">https://doi.org/10.1364/oe.397074</a>
  bibtex: '@article{Padberg_Santandrea_Rüsing_Brockmeier_Mackwitz_Berth_Zrenner_Eigner_Silberhorn_2020,
    title={Characterisation of width-dependent diffusion dynamics in rubidium-exchanged
    KTP waveguides}, DOI={<a href="https://doi.org/10.1364/oe.397074">10.1364/oe.397074</a>},
    number={24353}, journal={Optics Express}, author={Padberg, Laura and Santandrea,
    Matteo and Rüsing, Michael and Brockmeier, Julian and Mackwitz, Peter and Berth,
    Gerhard and Zrenner, Artur and Eigner, Christof and Silberhorn, Christine}, year={2020}
    }'
  chicago: Padberg, Laura, Matteo Santandrea, Michael Rüsing, Julian Brockmeier, Peter
    Mackwitz, Gerhard Berth, Artur Zrenner, Christof Eigner, and Christine Silberhorn.
    “Characterisation of Width-Dependent Diffusion Dynamics in Rubidium-Exchanged
    KTP Waveguides.” <i>Optics Express</i>, 2020. <a href="https://doi.org/10.1364/oe.397074">https://doi.org/10.1364/oe.397074</a>.
  ieee: 'L. Padberg <i>et al.</i>, “Characterisation of width-dependent diffusion
    dynamics in rubidium-exchanged KTP waveguides,” <i>Optics Express</i>, Art. no.
    24353, 2020, doi: <a href="https://doi.org/10.1364/oe.397074">10.1364/oe.397074</a>.'
  mla: Padberg, Laura, et al. “Characterisation of Width-Dependent Diffusion Dynamics
    in Rubidium-Exchanged KTP Waveguides.” <i>Optics Express</i>, 24353, 2020, doi:<a
    href="https://doi.org/10.1364/oe.397074">10.1364/oe.397074</a>.
  short: L. Padberg, M. Santandrea, M. Rüsing, J. Brockmeier, P. Mackwitz, G. Berth,
    A. Zrenner, C. Eigner, C. Silberhorn, Optics Express (2020).
date_created: 2021-10-08T11:12:36Z
date_updated: 2023-10-09T08:27:41Z
department:
- _id: '15'
- _id: '288'
doi: 10.1364/oe.397074
language:
- iso: eng
project:
- _id: '55'
  name: TRR 142 - Project Area B
publication: Optics Express
publication_identifier:
  issn:
  - 1094-4087
publication_status: published
status: public
title: Characterisation of width-dependent diffusion dynamics in rubidium-exchanged
  KTP waveguides
type: journal_article
user_id: '14931'
year: '2020'
...
---
_id: '4769'
abstract:
- lang: eng
  text: "In recent years, Raman spectroscopy has been used to visualize and analyze
    ferroelectric domain structures.\r\nThe technique makes use of the fact that the
    intensity or frequency of certain phonons is strongly influenced\r\nby the presence
    of domain walls. Although the method is used frequently, the underlying mechanism
    responsible\r\nfor the changes in the spectra is not fully understood. This inhibits
    deeper analysis of domain structures based\r\non this method. Two different models
    have been proposed. However, neither model completely explains all\r\nobservations.
    In this work, we have systematically investigated domain walls in different scattering
    geometries\r\nwith Raman spectroscopy in the common ferroelectric materials used
    in integrated optics, i.e., KTiOPO4,\r\nLiNbO3, and LiTaO3. Based on the two models,
    we can demonstrate that the observed contrast for domain\r\nwalls is in fact based
    on two different effects. We can identify on the one hand microscopic changes
    at the\r\ndomain wall, e.g., strain and electric fields, and on the other hand
    a macroscopic change of selection rules at the\r\ndomain wall. While the macroscopic
    relaxation of selection rules can be explained by the directional dispersion\r\nof
    the phonons in agreement with previous propositions, the microscopic changes can
    be explained qualitatively\r\nin terms of a simplified atomistic model."
article_type: original
author:
- first_name: Michael
  full_name: Rüsing, Michael
  id: '22501'
  last_name: Rüsing
  orcid: 0000-0003-4682-4577
- first_name: Sergej
  full_name: Neufeld, Sergej
  id: '23261'
  last_name: Neufeld
- first_name: Julian
  full_name: Brockmeier, Julian
  id: '44807'
  last_name: Brockmeier
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: P.
  full_name: Mackwitz, P.
  last_name: Mackwitz
- first_name: K.
  full_name: Spychala, K.
  last_name: Spychala
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Gerhard
  full_name: Berth, Gerhard
  id: '53'
  last_name: Berth
- first_name: Artur
  full_name: Zrenner, Artur
  id: '606'
  last_name: Zrenner
  orcid: 0000-0002-5190-0944
- first_name: S.
  full_name: Sanna, S.
  last_name: Sanna
citation:
  ama: 'Rüsing M, Neufeld S, Brockmeier J, et al. Imaging of 180∘ ferroelectric domain
    walls in uniaxial ferroelectrics by confocal Raman spectroscopy: Unraveling the
    contrast mechanism. <i>Physical Review Materials</i>. 2018;2(10). doi:<a href="https://doi.org/10.1103/physrevmaterials.2.103801">10.1103/physrevmaterials.2.103801</a>'
  apa: 'Rüsing, M., Neufeld, S., Brockmeier, J., Eigner, C., Mackwitz, P., Spychala,
    K., Silberhorn, C., Schmidt, W. G., Berth, G., Zrenner, A., &#38; Sanna, S. (2018).
    Imaging of 180∘ ferroelectric domain walls in uniaxial ferroelectrics by confocal
    Raman spectroscopy: Unraveling the contrast mechanism. <i>Physical Review Materials</i>,
    <i>2</i>(10). <a href="https://doi.org/10.1103/physrevmaterials.2.103801">https://doi.org/10.1103/physrevmaterials.2.103801</a>'
  bibtex: '@article{Rüsing_Neufeld_Brockmeier_Eigner_Mackwitz_Spychala_Silberhorn_Schmidt_Berth_Zrenner_et
    al._2018, title={Imaging of 180∘ ferroelectric domain walls in uniaxial ferroelectrics
    by confocal Raman spectroscopy: Unraveling the contrast mechanism}, volume={2},
    DOI={<a href="https://doi.org/10.1103/physrevmaterials.2.103801">10.1103/physrevmaterials.2.103801</a>},
    number={10}, journal={Physical Review Materials}, publisher={American Physical
    Society (APS)}, author={Rüsing, Michael and Neufeld, Sergej and Brockmeier, Julian
    and Eigner, Christof and Mackwitz, P. and Spychala, K. and Silberhorn, Christine
    and Schmidt, Wolf Gero and Berth, Gerhard and Zrenner, Artur and et al.}, year={2018}
    }'
  chicago: 'Rüsing, Michael, Sergej Neufeld, Julian Brockmeier, Christof Eigner, P.
    Mackwitz, K. Spychala, Christine Silberhorn, et al. “Imaging of 180∘ Ferroelectric
    Domain Walls in Uniaxial Ferroelectrics by Confocal Raman Spectroscopy: Unraveling
    the Contrast Mechanism.” <i>Physical Review Materials</i> 2, no. 10 (2018). <a
    href="https://doi.org/10.1103/physrevmaterials.2.103801">https://doi.org/10.1103/physrevmaterials.2.103801</a>.'
  ieee: 'M. Rüsing <i>et al.</i>, “Imaging of 180∘ ferroelectric domain walls in uniaxial
    ferroelectrics by confocal Raman spectroscopy: Unraveling the contrast mechanism,”
    <i>Physical Review Materials</i>, vol. 2, no. 10, 2018, doi: <a href="https://doi.org/10.1103/physrevmaterials.2.103801">10.1103/physrevmaterials.2.103801</a>.'
  mla: 'Rüsing, Michael, et al. “Imaging of 180∘ Ferroelectric Domain Walls in Uniaxial
    Ferroelectrics by Confocal Raman Spectroscopy: Unraveling the Contrast Mechanism.”
    <i>Physical Review Materials</i>, vol. 2, no. 10, American Physical Society (APS),
    2018, doi:<a href="https://doi.org/10.1103/physrevmaterials.2.103801">10.1103/physrevmaterials.2.103801</a>.'
  short: M. Rüsing, S. Neufeld, J. Brockmeier, C. Eigner, P. Mackwitz, K. Spychala,
    C. Silberhorn, W.G. Schmidt, G. Berth, A. Zrenner, S. Sanna, Physical Review Materials
    2 (2018).
date_created: 2018-10-18T08:50:47Z
date_updated: 2023-10-11T09:01:48Z
department:
- _id: '15'
- _id: '230'
- _id: '35'
- _id: '288'
doi: 10.1103/physrevmaterials.2.103801
intvolume: '         2'
issue: '10'
language:
- iso: eng
project:
- _id: '53'
  grant_number: '231447078'
  name: TRR 142
- _id: '55'
  name: TRR 142 - Project Area B
- _id: '69'
  grant_number: '231447078'
  name: TRR 142 - Subproject B4
- _id: '70'
  grant_number: '231447078'
  name: TRR 142 - Subproject B5
publication: Physical Review Materials
publication_identifier:
  issn:
  - 2475-9953
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Imaging of 180∘ ferroelectric domain walls in uniaxial ferroelectrics by confocal
  Raman spectroscopy: Unraveling the contrast mechanism'
type: journal_article
user_id: '22501'
volume: 2
year: '2018'
...