---
_id: '47993'
abstract:
- lang: eng
text: Structural strain severely impacts material properties, such as the linear
and nonlinear optical response. Moreover, strain plays a key role, e.g., in the
physics of ferroelectrics and, in particular, of their domain walls. μ-Raman spectroscopy
is a well-suited technique for the investigation of such strain effects as it
allows to measure the lattice dynamics locally. However, quantifying and reconstructing
strain fields from Raman maps requires knowledge on the strain dependence of phonon
frequencies. In this paper, we have analyzed both theoretically and experimentally
the phonon frequencies in the widely used ferroelectrics lithium niobate and lithium
tantalate as a function of uniaxial strain via density functional theory and μ-Raman
spectroscopy. Overall, we find a good agreement between our ab initio models and
the experimental data performed with a stress cell. The majority of phonons show
an increase in frequency under compressive strain, whereas the opposite is observed
for tensile strains. Moreover, for E-type phonons, we observe the lifting of degeneracy
already at moderate strain fields (i.e., at ±0.2%) along the x and y directions.
This paper, hence, allows for the systematic analysis of three-dimensional strains
in modern-type bulk and thin-film devices assembled from lithium niobate and tantalate.
article_number: '024420'
article_type: original
author:
- first_name: Ekta
full_name: Singh, Ekta
last_name: Singh
- first_name: Mike N.
full_name: Pionteck, Mike N.
last_name: Pionteck
- first_name: Sven
full_name: Reitzig, Sven
last_name: Reitzig
- first_name: Michael
full_name: Lange, Michael
last_name: Lange
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Simone
full_name: Sanna, Simone
last_name: Sanna
citation:
ama: Singh E, Pionteck MN, Reitzig S, et al. Vibrational properties of LiNbO3 and
LiTaO3 under uniaxial stress. Physical Review Materials. 2023;7(2). doi:10.1103/physrevmaterials.7.024420
apa: Singh, E., Pionteck, M. N., Reitzig, S., Lange, M., Rüsing, M., Eng, L. M.,
& Sanna, S. (2023). Vibrational properties of LiNbO3 and LiTaO3 under uniaxial
stress. Physical Review Materials, 7(2), Article 024420. https://doi.org/10.1103/physrevmaterials.7.024420
bibtex: '@article{Singh_Pionteck_Reitzig_Lange_Rüsing_Eng_Sanna_2023, title={Vibrational
properties of LiNbO3 and LiTaO3 under uniaxial stress}, volume={7}, DOI={10.1103/physrevmaterials.7.024420},
number={2024420}, journal={Physical Review Materials}, publisher={American Physical
Society (APS)}, author={Singh, Ekta and Pionteck, Mike N. and Reitzig, Sven and
Lange, Michael and Rüsing, Michael and Eng, Lukas M. and Sanna, Simone}, year={2023}
}'
chicago: Singh, Ekta, Mike N. Pionteck, Sven Reitzig, Michael Lange, Michael Rüsing,
Lukas M. Eng, and Simone Sanna. “Vibrational Properties of LiNbO3 and LiTaO3 under
Uniaxial Stress.” Physical Review Materials 7, no. 2 (2023). https://doi.org/10.1103/physrevmaterials.7.024420.
ieee: 'E. Singh et al., “Vibrational properties of LiNbO3 and LiTaO3 under
uniaxial stress,” Physical Review Materials, vol. 7, no. 2, Art. no. 024420,
2023, doi: 10.1103/physrevmaterials.7.024420.'
mla: Singh, Ekta, et al. “Vibrational Properties of LiNbO3 and LiTaO3 under Uniaxial
Stress.” Physical Review Materials, vol. 7, no. 2, 024420, American Physical
Society (APS), 2023, doi:10.1103/physrevmaterials.7.024420.
short: E. Singh, M.N. Pionteck, S. Reitzig, M. Lange, M. Rüsing, L.M. Eng, S. Sanna,
Physical Review Materials 7 (2023).
date_created: 2023-10-11T09:06:56Z
date_updated: 2023-10-11T09:08:16Z
doi: 10.1103/physrevmaterials.7.024420
extern: '1'
intvolume: ' 7'
issue: '2'
keyword:
- Physics and Astronomy (miscellaneous)
- General Materials Science
language:
- iso: eng
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society (APS)
quality_controlled: '1'
status: public
title: Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress
type: journal_article
user_id: '22501'
volume: 7
year: '2023'
...
---
_id: '47994'
abstract:
- lang: eng
text: Coherent nonlinear optical μ-spectroscopy is a frequently used tool in modern
material science as it is sensitive to many different local observables, which
comprise, among others, crystal symmetry and vibrational properties. The richness
in information, however, may come with challenges in data interpretation, as one
has to disentangle the many different effects like multiple reflections, phase
jumps at interfaces, or the influence of the Guoy-phase. In order to facilitate
interpretation, the work presented here proposes an easy-to-use semi-analytical
modeling Ansatz, which bases upon known analytical solutions using Gaussian beams.
Specifically, we apply this Ansatz to compute nonlinear optical responses of (thin
film) optical materials. We try to conserve the meaning of intuitive parameters
like the Gouy-phase and the nonlinear coherent interaction length. In particular,
the concept of coherence length is extended, which is a must when using focal
beams. The model is subsequently applied to exemplary cases of second- and third-harmonic
generation. We observe a very good agreement with experimental data, and furthermore,
despite the constraints and limits of the analytical Ansatz, our model performs
similarly well as when using more rigorous simulations. However, it outperforms
the latter in terms of computational power, requiring more than three orders less
computational time and less performant computer systems.
article_number: '123105'
article_type: original
author:
- first_name: Kai J.
full_name: Spychala, Kai J.
last_name: Spychala
- first_name: Zeeshan H.
full_name: Amber, Zeeshan H.
last_name: Amber
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
citation:
ama: 'Spychala KJ, Amber ZH, Eng LM, Rüsing M. Modeling nonlinear optical interactions
of focused beams in bulk crystals and thin films: A phenomenological approach.
Journal of Applied Physics. 2023;133(12). doi:10.1063/5.0136252'
apa: 'Spychala, K. J., Amber, Z. H., Eng, L. M., & Rüsing, M. (2023). Modeling
nonlinear optical interactions of focused beams in bulk crystals and thin films:
A phenomenological approach. Journal of Applied Physics, 133(12),
Article 123105. https://doi.org/10.1063/5.0136252'
bibtex: '@article{Spychala_Amber_Eng_Rüsing_2023, title={Modeling nonlinear optical
interactions of focused beams in bulk crystals and thin films: A phenomenological
approach}, volume={133}, DOI={10.1063/5.0136252},
number={12123105}, journal={Journal of Applied Physics}, publisher={AIP Publishing},
author={Spychala, Kai J. and Amber, Zeeshan H. and Eng, Lukas M. and Rüsing, Michael},
year={2023} }'
chicago: 'Spychala, Kai J., Zeeshan H. Amber, Lukas M. Eng, and Michael Rüsing.
“Modeling Nonlinear Optical Interactions of Focused Beams in Bulk Crystals and
Thin Films: A Phenomenological Approach.” Journal of Applied Physics 133,
no. 12 (2023). https://doi.org/10.1063/5.0136252.'
ieee: 'K. J. Spychala, Z. H. Amber, L. M. Eng, and M. Rüsing, “Modeling nonlinear
optical interactions of focused beams in bulk crystals and thin films: A phenomenological
approach,” Journal of Applied Physics, vol. 133, no. 12, Art. no. 123105,
2023, doi: 10.1063/5.0136252.'
mla: 'Spychala, Kai J., et al. “Modeling Nonlinear Optical Interactions of Focused
Beams in Bulk Crystals and Thin Films: A Phenomenological Approach.” Journal
of Applied Physics, vol. 133, no. 12, 123105, AIP Publishing, 2023, doi:10.1063/5.0136252.'
short: K.J. Spychala, Z.H. Amber, L.M. Eng, M. Rüsing, Journal of Applied Physics
133 (2023).
date_created: 2023-10-11T09:09:00Z
date_updated: 2023-10-11T16:10:54Z
doi: 10.1063/5.0136252
extern: '1'
intvolume: ' 133'
issue: '12'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.1063/5.0136252'
oa: '1'
publication: Journal of Applied Physics
publication_identifier:
issn:
- 0021-8979
- 1089-7550
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
status: public
title: 'Modeling nonlinear optical interactions of focused beams in bulk crystals
and thin films: A phenomenological approach'
type: journal_article
user_id: '22501'
volume: 133
year: '2023'
...
---
_id: '46573'
abstract:
- lang: eng
text: 'An ultra-fast change of the absorption onset for zincblende gallium-nitride
(zb-GaN) (fundamental bandgap: 3.23 eV) is observed by investigating the imaginary
part of the dielectric function using time-dependent femtosecond pump–probe spectroscopic
ellipsometry between 2.9 and 3.7 eV. The 266 nm (4.66 eV) pump pulses induce a
large electron–hole pair concentration up to 4×1020cm−3, which shift the transition
energy between conduction and valence bands due to many-body effects up to ≈500 meV.
Here, the absorption onset increases due to band filling while the bandgap renormalization
at the same time decreases the bandgap. Additionally, the absorption of the pump-beam
creates a free-carrier profile within the 605 nm zb-GaN layer with high free-carrier
concentrations at the surface, and low concentrations at the interface to the
substrate. This leads to varying optical properties from the sample surface (high
transition energy) to substrate (low transition energy), which are taken into
account by grading analysis for an accurate description of the experimental data.
For this, a model describing the time- and position-dependent free-carrier concentration
is formulated by considering the relaxation, recombination, and diffusion of those
carriers. We provide a quantitative analysis of optical experimental data (ellipsometric
angles Ψ and Δ) as well as a plot for the time-dependent change of the imaginary
part of the dielectric function.'
author:
- first_name: Elias
full_name: Baron, Elias
last_name: Baron
- first_name: Rüdiger
full_name: Goldhahn, Rüdiger
last_name: Goldhahn
- first_name: Shirly
full_name: Espinoza, Shirly
last_name: Espinoza
- first_name: Martin
full_name: Zahradník, Martin
last_name: Zahradník
- first_name: Mateusz
full_name: Rebarz, Mateusz
last_name: Rebarz
- first_name: Jakob
full_name: Andreasson, Jakob
last_name: Andreasson
- first_name: Michael
full_name: Deppe, Michael
last_name: Deppe
- first_name: Donat Josef
full_name: As, Donat Josef
id: '14'
last_name: As
orcid: 0000-0003-1121-3565
- first_name: Martin
full_name: Feneberg, Martin
last_name: Feneberg
citation:
ama: Baron E, Goldhahn R, Espinoza S, et al. Time-resolved pump–probe spectroscopic
ellipsometry of cubic GaN. I. Determination of the dielectric function. Journal
of Applied Physics. 2023;134(7). doi:10.1063/5.0153091
apa: Baron, E., Goldhahn, R., Espinoza, S., Zahradník, M., Rebarz, M., Andreasson,
J., Deppe, M., As, D. J., & Feneberg, M. (2023). Time-resolved pump–probe
spectroscopic ellipsometry of cubic GaN. I. Determination of the dielectric function.
Journal of Applied Physics, 134(7). https://doi.org/10.1063/5.0153091
bibtex: '@article{Baron_Goldhahn_Espinoza_Zahradník_Rebarz_Andreasson_Deppe_As_Feneberg_2023,
title={Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination
of the dielectric function}, volume={134}, DOI={10.1063/5.0153091},
number={7}, journal={Journal of Applied Physics}, publisher={AIP Publishing},
author={Baron, Elias and Goldhahn, Rüdiger and Espinoza, Shirly and Zahradník,
Martin and Rebarz, Mateusz and Andreasson, Jakob and Deppe, Michael and As, Donat
Josef and Feneberg, Martin}, year={2023} }'
chicago: Baron, Elias, Rüdiger Goldhahn, Shirly Espinoza, Martin Zahradník, Mateusz
Rebarz, Jakob Andreasson, Michael Deppe, Donat Josef As, and Martin Feneberg.
“Time-Resolved Pump–Probe Spectroscopic Ellipsometry of Cubic GaN. I. Determination
of the Dielectric Function.” Journal of Applied Physics 134, no. 7 (2023).
https://doi.org/10.1063/5.0153091.
ieee: 'E. Baron et al., “Time-resolved pump–probe spectroscopic ellipsometry
of cubic GaN. I. Determination of the dielectric function,” Journal of Applied
Physics, vol. 134, no. 7, 2023, doi: 10.1063/5.0153091.'
mla: Baron, Elias, et al. “Time-Resolved Pump–Probe Spectroscopic Ellipsometry of
Cubic GaN. I. Determination of the Dielectric Function.” Journal of Applied
Physics, vol. 134, no. 7, AIP Publishing, 2023, doi:10.1063/5.0153091.
short: E. Baron, R. Goldhahn, S. Espinoza, M. Zahradník, M. Rebarz, J. Andreasson,
M. Deppe, D.J. As, M. Feneberg, Journal of Applied Physics 134 (2023).
date_created: 2023-08-18T08:17:41Z
date_updated: 2023-10-09T09:17:15Z
department:
- _id: '15'
- _id: '230'
doi: 10.1063/5.0153091
intvolume: ' 134'
issue: '7'
keyword:
- General Physics and Astronomy
language:
- iso: eng
publication: Journal of Applied Physics
publication_identifier:
issn:
- 0021-8979
- 1089-7550
publication_status: published
publisher: AIP Publishing
status: public
title: Time-resolved pump–probe spectroscopic ellipsometry of cubic GaN. I. Determination
of the dielectric function
type: journal_article
user_id: '14931'
volume: 134
year: '2023'
...
---
_id: '47997'
abstract:
- lang: eng
text: The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising
material group for applications in quantum and nonlinear optics. The fabrication
of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric
domain structures, requires a profound understanding of the material properties
and crystal structure. In this regard, Raman spectroscopy offers the possibility
to study and visualize domain structures, strain, defects, and the local stoichiometry,
which are all factors impacting device performance. However, the accurate interpretation
of Raman spectra and their changes with respect to extrinsic and intrinsic defects
requires a thorough assignment of the Raman modes to their respective crystal
features, which to date is only partly conducted based on phenomenological modelling.
To address this issue, we calculated the phonon spectra of potassium titanyl phosphate
and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium
titanyl arsenate (KTiOAsO4) based on density functional theory and compared them
with experimental data. Overall, this allows us to assign various spectral features
to eigenmodes of lattice substructures with improved detail compared to previous
assignments. Nevertheless, the analysis also shows that not all features of the
spectra can unambigiously be explained yet. A possible explanation might be that
defects or long range fields not included in the modeling play a crucial rule
for the resulting Raman spectrum. In conclusion, this work provides an improved
foundation into the vibrational properties in the KTiOPO4 material family.
article_number: '1423'
author:
- first_name: Sergej
full_name: Neufeld, Sergej
last_name: Neufeld
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Gerhard
full_name: Berth, Gerhard
id: '53'
last_name: Berth
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
citation:
ama: Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium
Titanyl Phosphate Crystal Family. Crystals. 2023;13(10). doi:10.3390/cryst13101423
apa: Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn,
C., Eng, L. M., Schmidt, W. G., & Rüsing, M. (2023). Vibrational Properties
of the Potassium Titanyl Phosphate Crystal Family. Crystals, 13(10),
Article 1423. https://doi.org/10.3390/cryst13101423
bibtex: '@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023,
title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family},
volume={13}, DOI={10.3390/cryst13101423},
number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej
and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard
and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing,
Michael}, year={2023} }'
chicago: Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard
Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing.
“Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” Crystals
13, no. 10 (2023). https://doi.org/10.3390/cryst13101423.
ieee: 'S. Neufeld et al., “Vibrational Properties of the Potassium Titanyl
Phosphate Crystal Family,” Crystals, vol. 13, no. 10, Art. no. 1423, 2023,
doi: 10.3390/cryst13101423.'
mla: Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate
Crystal Family.” Crystals, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:10.3390/cryst13101423.
short: S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn,
L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).
date_created: 2023-10-11T09:10:53Z
date_updated: 2023-10-11T09:15:58Z
department:
- _id: '169'
doi: 10.3390/cryst13101423
funded_apc: '1'
intvolume: ' 13'
issue: '10'
keyword:
- Inorganic Chemistry
- Condensed Matter Physics
- General Materials Science
- General Chemical Engineering
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/cryst13101423
oa: '1'
project:
- _id: '168'
grant_number: '231447078'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
publication: Crystals
publication_identifier:
issn:
- 2073-4352
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family
type: journal_article
user_id: '22501'
volume: 13
year: '2023'
...
---
_id: '47996'
abstract:
- lang: eng
text: Specific heat capacity measurements by differential scanning calorimetry (DSC)
of single crystals of solid solutions of LiNbO3 and LiTaO3 are reported and compared
with corresponding ab initio calculations, with the aim to investigate the variation
of the ferroelectric Curie temperature as a function of composition. For this
purpose, single crystals of these solid solutions were grown with Czochralski
pulling along the c-axis. Elemental composition of Nb and Ta was investigated
using XRF analysis, and small samples with homogeneous and well known composition
were used for the DSC measurements. We observed that the ferroelectric Curie temperature
decreases linearly with increasing Ta concentration in the LiNb1−x Tax O3 solid
solution crystals. Furthermore, the ferroelectric transition width of a mixed
crystal appears to be smaller, as compared to pure LiTaO3.
article_type: original
author:
- first_name: Umar
full_name: Bashir, Umar
last_name: Bashir
- first_name: Klaus
full_name: Böttcher, Klaus
last_name: Böttcher
- first_name: Detlef
full_name: Klimm, Detlef
last_name: Klimm
- first_name: Steffen
full_name: Ganschow, Steffen
last_name: Ganschow
- first_name: Felix
full_name: Bernhardt, Felix
last_name: Bernhardt
- first_name: Simone
full_name: Sanna, Simone
last_name: Sanna
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Matthias
full_name: Bickermann, Matthias
last_name: Bickermann
citation:
ama: 'Bashir U, Böttcher K, Klimm D, et al. Solid solutions of lithium niobate and
lithium tantalate: crystal growth and the ferroelectric transition. Ferroelectrics.
2023;613(1):250-262. doi:10.1080/00150193.2023.2189842'
apa: 'Bashir, U., Böttcher, K., Klimm, D., Ganschow, S., Bernhardt, F., Sanna, S.,
Rüsing, M., Eng, L. M., & Bickermann, M. (2023). Solid solutions of lithium
niobate and lithium tantalate: crystal growth and the ferroelectric transition.
Ferroelectrics, 613(1), 250–262. https://doi.org/10.1080/00150193.2023.2189842'
bibtex: '@article{Bashir_Böttcher_Klimm_Ganschow_Bernhardt_Sanna_Rüsing_Eng_Bickermann_2023,
title={Solid solutions of lithium niobate and lithium tantalate: crystal growth
and the ferroelectric transition}, volume={613}, DOI={10.1080/00150193.2023.2189842},
number={1}, journal={Ferroelectrics}, publisher={Informa UK Limited}, author={Bashir,
Umar and Böttcher, Klaus and Klimm, Detlef and Ganschow, Steffen and Bernhardt,
Felix and Sanna, Simone and Rüsing, Michael and Eng, Lukas M. and Bickermann,
Matthias}, year={2023}, pages={250–262} }'
chicago: 'Bashir, Umar, Klaus Böttcher, Detlef Klimm, Steffen Ganschow, Felix Bernhardt,
Simone Sanna, Michael Rüsing, Lukas M. Eng, and Matthias Bickermann. “Solid Solutions
of Lithium Niobate and Lithium Tantalate: Crystal Growth and the Ferroelectric
Transition.” Ferroelectrics 613, no. 1 (2023): 250–62. https://doi.org/10.1080/00150193.2023.2189842.'
ieee: 'U. Bashir et al., “Solid solutions of lithium niobate and lithium
tantalate: crystal growth and the ferroelectric transition,” Ferroelectrics,
vol. 613, no. 1, pp. 250–262, 2023, doi: 10.1080/00150193.2023.2189842.'
mla: 'Bashir, Umar, et al. “Solid Solutions of Lithium Niobate and Lithium Tantalate:
Crystal Growth and the Ferroelectric Transition.” Ferroelectrics, vol.
613, no. 1, Informa UK Limited, 2023, pp. 250–62, doi:10.1080/00150193.2023.2189842.'
short: U. Bashir, K. Böttcher, D. Klimm, S. Ganschow, F. Bernhardt, S. Sanna, M.
Rüsing, L.M. Eng, M. Bickermann, Ferroelectrics 613 (2023) 250–262.
date_created: 2023-10-11T09:10:08Z
date_updated: 2023-10-11T09:10:36Z
doi: 10.1080/00150193.2023.2189842
extern: '1'
intvolume: ' 613'
issue: '1'
keyword:
- Condensed Matter Physics
- Electronic
- Optical and Magnetic Materials
language:
- iso: eng
page: 250-262
publication: Ferroelectrics
publication_identifier:
issn:
- 0015-0193
- 1563-5112
publication_status: published
publisher: Informa UK Limited
quality_controlled: '1'
status: public
title: 'Solid solutions of lithium niobate and lithium tantalate: crystal growth and
the ferroelectric transition'
type: journal_article
user_id: '22501'
volume: 613
year: '2023'
...
---
_id: '48349'
abstract:
- lang: eng
text: We report a titanium indiffused waveguide resonator featuring an integrated
electro-optic modulator for cavity length stabilisation that produces close to
5 dB of squeezed light at 1550 nm (2.4 dB directly measured). The resonator is
locked on resonance for tens of minutes with 70 mW of SH light incident on the
cavity, demonstrating that photorefraction can be mitigated. Squeezed light production
concurrent with cavity length stabilisation utilising the integrated EOM is demonstrated.
The device demonstrates the suitability of this platform for squeezed light generation
in network applications, where stabilisation to the reference field is typically
necessary.
article_number: '34903'
author:
- first_name: M.
full_name: Stefszky, M.
last_name: Stefszky
- first_name: F.
full_name: vom Bruch, F.
last_name: vom Bruch
- first_name: M.
full_name: Santandrea, M.
last_name: Santandrea
- first_name: R.
full_name: Ricken, R.
last_name: Ricken
- first_name: V.
full_name: Quiring, V.
last_name: Quiring
- first_name: C.
full_name: Eigner, C.
last_name: Eigner
- first_name: H
full_name: Herrmann, H
last_name: Herrmann
- first_name: C
full_name: Silberhorn, C
last_name: Silberhorn
citation:
ama: Stefszky M, vom Bruch F, Santandrea M, et al. Lithium niobate waveguide squeezer
with integrated cavity length stabilisation for network applications. Optics
Express. 2023;31(21). doi:10.1364/oe.498423
apa: Stefszky, M., vom Bruch, F., Santandrea, M., Ricken, R., Quiring, V., Eigner,
C., Herrmann, H., & Silberhorn, C. (2023). Lithium niobate waveguide squeezer
with integrated cavity length stabilisation for network applications. Optics
Express, 31(21), Article 34903. https://doi.org/10.1364/oe.498423
bibtex: '@article{Stefszky_vom Bruch_Santandrea_Ricken_Quiring_Eigner_Herrmann_Silberhorn_2023,
title={Lithium niobate waveguide squeezer with integrated cavity length stabilisation
for network applications}, volume={31}, DOI={10.1364/oe.498423},
number={2134903}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Stefszky, M. and vom Bruch, F. and Santandrea, M. and Ricken, R. and Quiring,
V. and Eigner, C. and Herrmann, H and Silberhorn, C}, year={2023} }'
chicago: Stefszky, M., F. vom Bruch, M. Santandrea, R. Ricken, V. Quiring, C. Eigner,
H Herrmann, and C Silberhorn. “Lithium Niobate Waveguide Squeezer with Integrated
Cavity Length Stabilisation for Network Applications.” Optics Express 31,
no. 21 (2023). https://doi.org/10.1364/oe.498423.
ieee: 'M. Stefszky et al., “Lithium niobate waveguide squeezer with integrated
cavity length stabilisation for network applications,” Optics Express,
vol. 31, no. 21, Art. no. 34903, 2023, doi: 10.1364/oe.498423.'
mla: Stefszky, M., et al. “Lithium Niobate Waveguide Squeezer with Integrated Cavity
Length Stabilisation for Network Applications.” Optics Express, vol. 31,
no. 21, 34903, Optica Publishing Group, 2023, doi:10.1364/oe.498423.
short: M. Stefszky, F. vom Bruch, M. Santandrea, R. Ricken, V. Quiring, C. Eigner,
H. Herrmann, C. Silberhorn, Optics Express 31 (2023).
date_created: 2023-10-19T14:22:59Z
date_updated: 2023-11-02T09:26:42Z
department:
- _id: '288'
- _id: '623'
doi: 10.1364/oe.498423
intvolume: ' 31'
issue: '21'
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: Lithium niobate waveguide squeezer with integrated cavity length stabilisation
for network applications
type: journal_article
user_id: '42777'
volume: 31
year: '2023'
...
---
_id: '48464'
abstract:
- lang: eng
text: AbstractInitial value problems can be solved
efficiently by means of Runge–Kutta algorithms with adaptive step size control.
Diagonally implicit Runge–Kutta (DIRK) methods are the most popular class among
the diverse family of Runge–Kutta algorithms. In this paper, the novel class of
low‐order explicit last‐stage diagonally implicit Runge–Kutta (ELDIRK) methods
are explored, which combine implicit schemes with an additional explicit evaluation
as an explicit last stage. ELDIRK Butcher tableaus are used to control embedded
RK methods to obtain solutions of different orders. The lower‐order solution is
obtained by classical implicit RK stages and the higher‐order solution is obtained
by additional explicit evaluation. As a result, a significant reduction in computational
cost is achieved by skipping the iterative solution of nonlinear systems for the
additional step. The examination of the heat problem and the use of the innovative
Butcher tableau in the finite‐element method are the main contributions of this
work. Thus, it is possible to establish adaptive step size control for the new
low‐order embedded methods based on an empirical method for error estimation.
Two‐dimensional simulations are used to show an appropriate algorithm for the
ELDIRK schemes. The new Runge–Kutta schemes' predictions of higher‐order convergence
are confirmed, and their successful outcomes are illustrated.
author:
- first_name: Hendrik
full_name: Westermann, Hendrik
id: '60816'
last_name: Westermann
orcid: 0000-0002-5034-9708
- first_name: Rolf
full_name: Mahnken, Rolf
id: '335'
last_name: Mahnken
citation:
ama: Westermann H, Mahnken R. Numerical investigations of new low‐order explicit
last stage diagonal implicit Runge–Kutta schemes with the finite‐element method.
PAMM. 2023;23(2). doi:10.1002/pamm.202300071
apa: Westermann, H., & Mahnken, R. (2023). Numerical investigations of new low‐order
explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element
method. PAMM, 23(2). https://doi.org/10.1002/pamm.202300071
bibtex: '@article{Westermann_Mahnken_2023, title={Numerical investigations of new
low‐order explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element
method}, volume={23}, DOI={10.1002/pamm.202300071},
number={2}, journal={PAMM}, publisher={Wiley}, author={Westermann, Hendrik and
Mahnken, Rolf}, year={2023} }'
chicago: Westermann, Hendrik, and Rolf Mahnken. “Numerical Investigations of New
Low‐order Explicit Last Stage Diagonal Implicit Runge–Kutta Schemes with the Finite‐element
Method.” PAMM 23, no. 2 (2023). https://doi.org/10.1002/pamm.202300071.
ieee: 'H. Westermann and R. Mahnken, “Numerical investigations of new low‐order
explicit last stage diagonal implicit Runge–Kutta schemes with the finite‐element
method,” PAMM, vol. 23, no. 2, 2023, doi: 10.1002/pamm.202300071.'
mla: Westermann, Hendrik, and Rolf Mahnken. “Numerical Investigations of New Low‐order
Explicit Last Stage Diagonal Implicit Runge–Kutta Schemes with the Finite‐element
Method.” PAMM, vol. 23, no. 2, Wiley, 2023, doi:10.1002/pamm.202300071.
short: H. Westermann, R. Mahnken, PAMM 23 (2023).
date_created: 2023-10-25T10:46:57Z
date_updated: 2023-11-07T14:34:44Z
department:
- _id: '9'
- _id: '154'
- _id: '321'
doi: 10.1002/pamm.202300071
intvolume: ' 23'
issue: '2'
keyword:
- Electrical and Electronic Engineering
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: PAMM
publication_identifier:
issn:
- 1617-7061
- 1617-7061
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Numerical investigations of new low‐order explicit last stage diagonal implicit
Runge–Kutta schemes with the finite‐element method
type: journal_article
user_id: '335'
volume: 23
year: '2023'
...
---
_id: '48465'
article_number: '116545'
author:
- first_name: Hendrik
full_name: Westermann, Hendrik
id: '60816'
last_name: Westermann
orcid: 0000-0002-5034-9708
- first_name: Rolf
full_name: Mahnken, Rolf
id: '335'
last_name: Mahnken
citation:
ama: Westermann H, Mahnken R. On the accuracy, stability and computational efficiency
of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK) for the
adaptive solution of phase-field problems. Computer Methods in Applied Mechanics
and Engineering. 2023;418. doi:10.1016/j.cma.2023.116545
apa: Westermann, H., & Mahnken, R. (2023). On the accuracy, stability and computational
efficiency of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK)
for the adaptive solution of phase-field problems. Computer Methods in Applied
Mechanics and Engineering, 418, Article 116545. https://doi.org/10.1016/j.cma.2023.116545
bibtex: '@article{Westermann_Mahnken_2023, title={On the accuracy, stability and
computational efficiency of explicit last-stage diagonally implicit Runge–Kutta
methods (ELDIRK) for the adaptive solution of phase-field problems}, volume={418},
DOI={10.1016/j.cma.2023.116545},
number={116545}, journal={Computer Methods in Applied Mechanics and Engineering},
publisher={Elsevier BV}, author={Westermann, Hendrik and Mahnken, Rolf}, year={2023}
}'
chicago: Westermann, Hendrik, and Rolf Mahnken. “On the Accuracy, Stability and
Computational Efficiency of Explicit Last-Stage Diagonally Implicit Runge–Kutta
Methods (ELDIRK) for the Adaptive Solution of Phase-Field Problems.” Computer
Methods in Applied Mechanics and Engineering 418 (2023). https://doi.org/10.1016/j.cma.2023.116545.
ieee: 'H. Westermann and R. Mahnken, “On the accuracy, stability and computational
efficiency of explicit last-stage diagonally implicit Runge–Kutta methods (ELDIRK)
for the adaptive solution of phase-field problems,” Computer Methods in Applied
Mechanics and Engineering, vol. 418, Art. no. 116545, 2023, doi: 10.1016/j.cma.2023.116545.'
mla: Westermann, Hendrik, and Rolf Mahnken. “On the Accuracy, Stability and Computational
Efficiency of Explicit Last-Stage Diagonally Implicit Runge–Kutta Methods (ELDIRK)
for the Adaptive Solution of Phase-Field Problems.” Computer Methods in Applied
Mechanics and Engineering, vol. 418, 116545, Elsevier BV, 2023, doi:10.1016/j.cma.2023.116545.
short: H. Westermann, R. Mahnken, Computer Methods in Applied Mechanics and Engineering
418 (2023).
date_created: 2023-10-25T10:47:23Z
date_updated: 2023-11-07T14:34:56Z
department:
- _id: '9'
- _id: '154'
- _id: '321'
doi: 10.1016/j.cma.2023.116545
intvolume: ' 418'
keyword:
- Computer Science Applications
- General Physics and Astronomy
- Mechanical Engineering
- Mechanics of Materials
- Computational Mechanics
language:
- iso: eng
publication: Computer Methods in Applied Mechanics and Engineering
publication_identifier:
issn:
- 0045-7825
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: On the accuracy, stability and computational efficiency of explicit last-stage
diagonally implicit Runge–Kutta methods (ELDIRK) for the adaptive solution of phase-field
problems
type: journal_article
user_id: '335'
volume: 418
year: '2023'
...
---
_id: '48639'
abstract:
- lang: eng
text: The seven parallel dissociative ionization channels of benzonitrile yield
highly stable fragment ions with commensurate abundance, underlining the potential
role of the benzonitrile cation as hub species in the interstellar medium.
article_type: original
author:
- first_name: Jerry
full_name: Kamer, Jerry
last_name: Kamer
- first_name: Domenik
full_name: Schleier, Domenik
id: '98339'
last_name: Schleier
- first_name: Merel
full_name: Donker, Merel
last_name: Donker
- first_name: Patrick
full_name: Hemberger, Patrick
last_name: Hemberger
- first_name: Andras
full_name: Bodi, Andras
last_name: Bodi
- first_name: Jordy
full_name: Bouwman, Jordy
last_name: Bouwman
citation:
ama: Kamer J, Schleier D, Donker M, Hemberger P, Bodi A, Bouwman J. Threshold photoelectron
spectroscopy and dissociative photoionization of benzonitrile. Physical Chemistry
Chemical Physics. 2023;25(42):29070-29079. doi:10.1039/d3cp03977c
apa: Kamer, J., Schleier, D., Donker, M., Hemberger, P., Bodi, A., & Bouwman,
J. (2023). Threshold photoelectron spectroscopy and dissociative photoionization
of benzonitrile. Physical Chemistry Chemical Physics, 25(42), 29070–29079.
https://doi.org/10.1039/d3cp03977c
bibtex: '@article{Kamer_Schleier_Donker_Hemberger_Bodi_Bouwman_2023, title={Threshold
photoelectron spectroscopy and dissociative photoionization of benzonitrile},
volume={25}, DOI={10.1039/d3cp03977c},
number={42}, journal={Physical Chemistry Chemical Physics}, publisher={Royal Society
of Chemistry (RSC)}, author={Kamer, Jerry and Schleier, Domenik and Donker, Merel
and Hemberger, Patrick and Bodi, Andras and Bouwman, Jordy}, year={2023}, pages={29070–29079}
}'
chicago: 'Kamer, Jerry, Domenik Schleier, Merel Donker, Patrick Hemberger, Andras
Bodi, and Jordy Bouwman. “Threshold Photoelectron Spectroscopy and Dissociative
Photoionization of Benzonitrile.” Physical Chemistry Chemical Physics 25,
no. 42 (2023): 29070–79. https://doi.org/10.1039/d3cp03977c.'
ieee: 'J. Kamer, D. Schleier, M. Donker, P. Hemberger, A. Bodi, and J. Bouwman,
“Threshold photoelectron spectroscopy and dissociative photoionization of benzonitrile,”
Physical Chemistry Chemical Physics, vol. 25, no. 42, pp. 29070–29079,
2023, doi: 10.1039/d3cp03977c.'
mla: Kamer, Jerry, et al. “Threshold Photoelectron Spectroscopy and Dissociative
Photoionization of Benzonitrile.” Physical Chemistry Chemical Physics,
vol. 25, no. 42, Royal Society of Chemistry (RSC), 2023, pp. 29070–79, doi:10.1039/d3cp03977c.
short: J. Kamer, D. Schleier, M. Donker, P. Hemberger, A. Bodi, J. Bouwman, Physical
Chemistry Chemical Physics 25 (2023) 29070–29079.
date_created: 2023-11-07T07:24:53Z
date_updated: 2023-11-13T08:00:52Z
department:
- _id: '728'
doi: 10.1039/d3cp03977c
intvolume: ' 25'
issue: '42'
keyword:
- Physical and Theoretical Chemistry
- General Physics and Astronomy
language:
- iso: eng
page: 29070-29079
publication: Physical Chemistry Chemical Physics
publication_identifier:
issn:
- 1463-9076
- 1463-9084
publication_status: published
publisher: Royal Society of Chemistry (RSC)
quality_controlled: '1'
status: public
title: Threshold photoelectron spectroscopy and dissociative photoionization of benzonitrile
type: journal_article
user_id: '98339'
volume: 25
year: '2023'
...
---
_id: '49107'
abstract:
- lang: eng
text: The effect of plaque deposition (atherosclerosis) on blood flow behaviour
is investigated via computational fluid dynamics and structural mechanics simulations.
To mitigate the narrowing of coronary artery atherosclerosis (stenosis), the computational
modelling of auxetic and non-auxetic stents was performed in this study to minimise
or even avoid these deposition agents in the future. Computational modelling was
performed in unrestricted (open) conditions and restricted (in an artery) conditions.
Finally, stent designs were produced by additive manufacturing, and mechanical
testing of the stents was undertaken. Auxetic stent 1 and auxetic stent 2 exhibit
very little foreshortening and radial recoil in unrestricted deployment conditions
compared to non-auxetic stent 3. However, stent 2 shows structural instability
(strut failure) during unrestricted deployment conditions. For the restricted
deployment condition, stent 1 shows a higher radial recoil compared to stent 3.
In the tensile test simulations, short elongation for stent 1 due to strut failure
is demonstrated, whereas no structural instability is noticed for stent 2 and
stent 3 until 0.5 (mm/mm) strain. The as-built samples show a significant thickening
of the struts of the stents resulting in short elongations during tensile testing
compared to the simulations (stent 2 and stent 3). A modelling framework for the
stent deployment system that enables the selection of appropriate stent designs
before in vivo testing is required. This leads to the acceleration of the development
process and a reduction in time, resulting in less material wastage. The modelling
framework shall be useful for doctors designing patient-specific stents.
article_number: '1592'
author:
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Dennis
full_name: Milaege, Dennis
last_name: Milaege
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: 'Pramanik S, Milaege D, Hein M, Hoyer K-P, Schaper M. Additive Manufacturing
and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents:
A Combined Experimental and Computational Modelling Approach. Crystals.
2023;13(11). doi:10.3390/cryst13111592'
apa: 'Pramanik, S., Milaege, D., Hein, M., Hoyer, K.-P., & Schaper, M. (2023).
Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn
Biomedical Stents: A Combined Experimental and Computational Modelling Approach.
Crystals, 13(11), Article 1592. https://doi.org/10.3390/cryst13111592'
bibtex: '@article{Pramanik_Milaege_Hein_Hoyer_Schaper_2023, title={Additive Manufacturing
and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents:
A Combined Experimental and Computational Modelling Approach}, volume={13}, DOI={10.3390/cryst13111592}, number={111592},
journal={Crystals}, publisher={MDPI AG}, author={Pramanik, Sudipta and Milaege,
Dennis and Hein, Maxwell and Hoyer, Kay-Peter and Schaper, Mirko}, year={2023}
}'
chicago: 'Pramanik, Sudipta, Dennis Milaege, Maxwell Hein, Kay-Peter Hoyer, and
Mirko Schaper. “Additive Manufacturing and Mechanical Properties of Auxetic and
Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational
Modelling Approach.” Crystals 13, no. 11 (2023). https://doi.org/10.3390/cryst13111592.'
ieee: 'S. Pramanik, D. Milaege, M. Hein, K.-P. Hoyer, and M. Schaper, “Additive
Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn
Biomedical Stents: A Combined Experimental and Computational Modelling Approach,”
Crystals, vol. 13, no. 11, Art. no. 1592, 2023, doi: 10.3390/cryst13111592.'
mla: 'Pramanik, Sudipta, et al. “Additive Manufacturing and Mechanical Properties
of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental
and Computational Modelling Approach.” Crystals, vol. 13, no. 11, 1592,
MDPI AG, 2023, doi:10.3390/cryst13111592.'
short: S. Pramanik, D. Milaege, M. Hein, K.-P. Hoyer, M. Schaper, Crystals 13 (2023).
date_created: 2023-11-21T15:29:49Z
date_updated: 2023-11-21T15:30:57Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/cryst13111592
intvolume: ' 13'
issue: '11'
keyword:
- Inorganic Chemistry
- Condensed Matter Physics
- General Materials Science
- General Chemical Engineering
language:
- iso: eng
publication: Crystals
publication_identifier:
issn:
- 2073-4352
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: 'Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic
Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling
Approach'
type: journal_article
user_id: '48411'
volume: 13
year: '2023'
...
---
_id: '49117'
article_number: '043158'
author:
- first_name: D.
full_name: Scharwald, D.
last_name: Scharwald
- first_name: T.
full_name: Meier, T.
last_name: Meier
- first_name: P. R.
full_name: Sharapova, P. R.
last_name: Sharapova
citation:
ama: Scharwald D, Meier T, Sharapova PR. Phase sensitivity of spatially broadband
high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers. Physical Review Research. 2023;5(4). doi:10.1103/physrevresearch.5.043158
apa: Scharwald, D., Meier, T., & Sharapova, P. R. (2023). Phase sensitivity
of spatially broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers. Physical Review Research, 5(4), Article 043158.
https://doi.org/10.1103/physrevresearch.5.043158
bibtex: '@article{Scharwald_Meier_Sharapova_2023, title={Phase sensitivity of spatially
broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers}, volume={5}, DOI={10.1103/physrevresearch.5.043158},
number={4043158}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Scharwald, D. and Meier, T. and Sharapova, P. R.}, year={2023}
}'
chicago: Scharwald, D., T. Meier, and P. R. Sharapova. “Phase Sensitivity of Spatially
Broadband High-Gain <mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math>
Interferometers.” Physical Review Research 5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043158.
ieee: 'D. Scharwald, T. Meier, and P. R. Sharapova, “Phase sensitivity of spatially
broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers,” Physical Review Research, vol. 5, no. 4, Art. no. 043158,
2023, doi: 10.1103/physrevresearch.5.043158.'
mla: Scharwald, D., et al. “Phase Sensitivity of Spatially Broadband High-Gain <mml:Math
Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math>
Interferometers.” Physical Review Research, vol. 5, no. 4, 043158, American
Physical Society (APS), 2023, doi:10.1103/physrevresearch.5.043158.
short: D. Scharwald, T. Meier, P.R. Sharapova, Physical Review Research 5 (2023).
date_created: 2023-11-22T09:18:02Z
date_updated: 2023-11-22T09:19:02Z
department:
- _id: '15'
- _id: '170'
- _id: '230'
- _id: '569'
- _id: '429'
doi: 10.1103/physrevresearch.5.043158
intvolume: ' 5'
issue: '4'
keyword:
- General Physics and Astronomy
language:
- iso: eng
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Phase sensitivity of spatially broadband high-gain SU(1,1)
interferometers
type: journal_article
user_id: '60286'
volume: 5
year: '2023'
...
---
_id: '48399'
abstract:
- lang: eng
text: 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.
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. Optics Express. 2023;31(20). doi:10.1364/oe.492035
apa: Thiele, F., Hummel, T., McCaughan, A. N., Brockmeier, J., Protte, M., Quiring,
V., Lengeling, S., Eigner, C., Silberhorn, C., & Bartley, T. (2023). All optical
operation of a superconducting photonic interface. Optics Express, 31(20),
Article 32717. https://doi.org/10.1364/oe.492035
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={10.1364/oe.492035}, 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.” Optics Express 31, no. 20 (2023). https://doi.org/10.1364/oe.492035.
ieee: 'F. Thiele et al., “All optical operation of a superconducting photonic
interface,” Optics Express, vol. 31, no. 20, Art. no. 32717, 2023, doi:
10.1364/oe.492035.'
mla: Thiele, Frederik, et al. “All Optical Operation of a Superconducting Photonic
Interface.” Optics Express, vol. 31, no. 20, 32717, Optica Publishing Group,
2023, doi:10.1364/oe.492035.
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: '43440'
author:
- first_name: Bingru
full_name: Zhang, Bingru
last_name: Zhang
- first_name: Linh
full_name: Nguyen, Linh
last_name: Nguyen
- first_name: Kevin
full_name: Martens, Kevin
last_name: Martens
- first_name: Amelie
full_name: Heuer-Jungemann, Amelie
last_name: Heuer-Jungemann
- first_name: Julian
full_name: Philipp, Julian
last_name: Philipp
- first_name: Susanne
full_name: Kempter, Susanne
last_name: Kempter
- first_name: Joachim O.
full_name: Rädler, Joachim O.
last_name: Rädler
- first_name: Tim
full_name: Liedl, Tim
last_name: Liedl
- first_name: Heinz-Siegfried
full_name: Kitzerow, Heinz-Siegfried
id: '254'
last_name: Kitzerow
citation:
ama: Zhang B, Nguyen L, Martens K, et al. Luminescent DNA-origami nano-rods dispersed
in a lyotropic chromonic liquid crystal. Liquid Crystals. 2023;50(7-10):1243-1251.
doi:10.1080/02678292.2023.2188494
apa: Zhang, B., Nguyen, L., Martens, K., Heuer-Jungemann, A., Philipp, J., Kempter,
S., Rädler, J. O., Liedl, T., & Kitzerow, H.-S. (2023). Luminescent DNA-origami
nano-rods dispersed in a lyotropic chromonic liquid crystal. Liquid Crystals,
50(7–10), 1243–1251. https://doi.org/10.1080/02678292.2023.2188494
bibtex: '@article{Zhang_Nguyen_Martens_Heuer-Jungemann_Philipp_Kempter_Rädler_Liedl_Kitzerow_2023,
title={Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid
crystal}, volume={50}, DOI={10.1080/02678292.2023.2188494},
number={7–10}, journal={Liquid Crystals}, publisher={Informa UK Limited}, author={Zhang,
Bingru and Nguyen, Linh and Martens, Kevin and Heuer-Jungemann, Amelie and Philipp,
Julian and Kempter, Susanne and Rädler, Joachim O. and Liedl, Tim and Kitzerow,
Heinz-Siegfried}, year={2023}, pages={1243–1251} }'
chicago: 'Zhang, Bingru, Linh Nguyen, Kevin Martens, Amelie Heuer-Jungemann, Julian
Philipp, Susanne Kempter, Joachim O. Rädler, Tim Liedl, and Heinz-Siegfried Kitzerow.
“Luminescent DNA-Origami Nano-Rods Dispersed in a Lyotropic Chromonic Liquid Crystal.”
Liquid Crystals 50, no. 7–10 (2023): 1243–51. https://doi.org/10.1080/02678292.2023.2188494.'
ieee: 'B. Zhang et al., “Luminescent DNA-origami nano-rods dispersed in a
lyotropic chromonic liquid crystal,” Liquid Crystals, vol. 50, no. 7–10,
pp. 1243–1251, 2023, doi: 10.1080/02678292.2023.2188494.'
mla: Zhang, Bingru, et al. “Luminescent DNA-Origami Nano-Rods Dispersed in a Lyotropic
Chromonic Liquid Crystal.” Liquid Crystals, vol. 50, no. 7–10, Informa
UK Limited, 2023, pp. 1243–51, doi:10.1080/02678292.2023.2188494.
short: B. Zhang, L. Nguyen, K. Martens, A. Heuer-Jungemann, J. Philipp, S. Kempter,
J.O. Rädler, T. Liedl, H.-S. Kitzerow, Liquid Crystals 50 (2023) 1243–1251.
date_created: 2023-04-08T17:21:30Z
date_updated: 2023-12-13T15:54:31Z
department:
- _id: '313'
- _id: '230'
doi: 10.1080/02678292.2023.2188494
intvolume: ' 50'
issue: 7-10
keyword:
- Condensed Matter Physics
- General Materials Science
- General Chemistry
language:
- iso: eng
page: 1243-1251
publication: Liquid Crystals
publication_identifier:
issn:
- 0267-8292
- 1366-5855
publication_status: published
publisher: Informa UK Limited
status: public
title: Luminescent DNA-origami nano-rods dispersed in a lyotropic chromonic liquid
crystal
type: journal_article
user_id: '254'
volume: 50
year: '2023'
...
---
_id: '49827'
abstract:
- lang: ger
text: 'Im Beitrag wird ein digitales Tool zur fächerübergreifenden Förderung von
Textkompetenzen vorgestellt. Zunächst werden die Funktionen des Tools beschrieben
und das zugrundeliegende tool-based task Design erläutert. Anhand eines Lehr-Lern-Arrangements
zum argumentierenden Schreiben wird exemplarisch gezeigt, wie das Tool im Deutschunterricht
eingesetzt werden kann. Anschließend werden erste empirische Befunde aus der am
Design-Based-Research orientierten Studie vorgestellt. Abstract (english): AnnoPy
– A digital tool for cross-curricular text literacy development In this article
we present a digital tool for cross-curricular text literacy development. At first,
we describe the basic functions of the tool and the underlying tool-based task
design. After that, a teaching arrangement for German lessons is used to show
how the tool can be used to foster argumentative writing. Subsequently, first
results of the design-based study are presented.'
- lang: eng
text: In this article we present a digital tool for cross-curricular text literacy
development. At first, we describe the basic functions of the tool and the underlying
tool-based task design. After that, a teaching arrangement for German lessons
is used to show how the tool can be used to foster argumentative writing. Subsequently,
first results of the design-based study are presented.
article_type: original
author:
- first_name: Sara
full_name: Rezat, Sara
id: '58338'
last_name: Rezat
- first_name: Oliver
full_name: Scholle, Oliver
id: '15099'
last_name: Scholle
citation:
ama: Rezat S, Scholle O. AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen.
Medien im Deutschunterricht. Published online 2023. doi:10.18716/OJS/MIDU/2023.1.5
apa: Rezat, S., & Scholle, O. (2023). AnnoPy. Ein digitales Tool zur Förderung
von Textkompetenzen. Medien im Deutschunterricht. https://doi.org/10.18716/OJS/MIDU/2023.1.5
bibtex: '@article{Rezat_Scholle_2023, title={AnnoPy. Ein digitales Tool zur Förderung
von Textkompetenzen}, DOI={10.18716/OJS/MIDU/2023.1.5},
journal={Medien im Deutschunterricht}, author={Rezat, Sara and Scholle, Oliver},
year={2023} }'
chicago: Rezat, Sara, and Oliver Scholle. “AnnoPy. Ein digitales Tool zur Förderung
von Textkompetenzen.” Medien im Deutschunterricht, 2023. https://doi.org/10.18716/OJS/MIDU/2023.1.5.
ieee: 'S. Rezat and O. Scholle, “AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen,”
Medien im Deutschunterricht, 2023, doi: 10.18716/OJS/MIDU/2023.1.5.'
mla: Rezat, Sara, and Oliver Scholle. “AnnoPy. Ein digitales Tool zur Förderung
von Textkompetenzen.” Medien im Deutschunterricht, 2023, doi:10.18716/OJS/MIDU/2023.1.5.
short: S. Rezat, O. Scholle, Medien im Deutschunterricht (2023).
date_created: 2023-12-19T07:49:50Z
date_updated: 2023-12-19T08:10:01Z
department:
- _id: '463'
doi: 10.18716/OJS/MIDU/2023.1.5
keyword:
- Textkompetenz
- Digitales Lesen und Schreiben
- Kollaborativer Umgang mit Texten
- Prozedurenorientierte Schreibdidaktik
- Design-based-Research
language:
- iso: ger
license: https://creativecommons.org/licenses/by-nc-nd/4.0/
main_file_link:
- open_access: '1'
url: https://journals.ub.uni-koeln.de/index.php/midu/article/view/1914
oa: '1'
publication: Medien im Deutschunterricht
publication_status: published
quality_controlled: '1'
status: public
title: AnnoPy. Ein digitales Tool zur Förderung von Textkompetenzen
type: journal_article
user_id: '15099'
year: '2023'
...
---
_id: '49866'
abstract:
- lang: eng
text: AbstractThe use of heterogeneous materials,
such as composites with Prandtl‐Reuss‐type material laws, has increased in industrial
praxis, making finite element modeling with homogenization techniques a well‐accepted
tool. These methods are particularly advantageous to account for microstructural
mechanisms which can be related to nonlinearities and time‐dependency due to elasto‐plasticity
behavior. However, their advantages are diminished by increasing computational
demand. The present contribution deals with the balance of accuracy and numerical
efficiency of nonlinear homogenization associated with a framework of goal‐oriented
adaptivity, which takes into account error accumulation over time. To this end,
model adaptivity of homogenization methods is coupled to mesh adaptivity on the
macro scale. Our new proposed adaptive procedure is driven by a goal‐oriented
a posteriori error estimator based on duality techniques using downwind and upwind
approximations. Due to nonlinearities and time‐dependency of the plasticity, the
estimation of error transport and error generation is obtained with a backward‐in‐time
dual method despite a high demand on memory capacity. In this contribution, the
dual problem is solved with a forward‐in‐time dual method that allows estimating
the full error during the resolution of the primal problem without the need for
extra memory capacity. Finally, a numerical example illustrates the effectiveness
of the proposed adaptive approach.
author:
- first_name: Arnold
full_name: Tchomgue Simeu, Arnold
id: '83075'
last_name: Tchomgue Simeu
- first_name: Rolf
full_name: Mahnken, Rolf
id: '335'
last_name: Mahnken
citation:
ama: Tchomgue Simeu A, Mahnken R. Downwind and upwind approximations for mesh and
model adaptivity of elasto‐plastic composites. PAMM. Published online 2023.
doi:10.1002/pamm.202300136
apa: Tchomgue Simeu, A., & Mahnken, R. (2023). Downwind and upwind approximations
for mesh and model adaptivity of elasto‐plastic composites. PAMM. https://doi.org/10.1002/pamm.202300136
bibtex: '@article{Tchomgue Simeu_Mahnken_2023, title={Downwind and upwind approximations
for mesh and model adaptivity of elasto‐plastic composites}, DOI={10.1002/pamm.202300136},
journal={PAMM}, publisher={Wiley}, author={Tchomgue Simeu, Arnold and Mahnken,
Rolf}, year={2023} }'
chicago: Tchomgue Simeu, Arnold, and Rolf Mahnken. “Downwind and Upwind Approximations
for Mesh and Model Adaptivity of Elasto‐plastic Composites.” PAMM, 2023.
https://doi.org/10.1002/pamm.202300136.
ieee: 'A. Tchomgue Simeu and R. Mahnken, “Downwind and upwind approximations for
mesh and model adaptivity of elasto‐plastic composites,” PAMM, 2023, doi:
10.1002/pamm.202300136.'
mla: Tchomgue Simeu, Arnold, and Rolf Mahnken. “Downwind and Upwind Approximations
for Mesh and Model Adaptivity of Elasto‐plastic Composites.” PAMM, Wiley,
2023, doi:10.1002/pamm.202300136.
short: A. Tchomgue Simeu, R. Mahnken, PAMM (2023).
date_created: 2023-12-19T12:20:05Z
date_updated: 2023-12-19T12:20:51Z
department:
- _id: '9'
- _id: '154'
- _id: '321'
doi: 10.1002/pamm.202300136
keyword:
- Electrical and Electronic Engineering
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: PAMM
publication_identifier:
issn:
- 1617-7061
- 1617-7061
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Downwind and upwind approximations for mesh and model adaptivity of elasto‐plastic
composites
type: journal_article
user_id: '335'
year: '2023'
...
---
_id: '50407'
abstract:
- lang: eng
text: In the last decade, conductive domain walls (CDWs) in single crystals of the
uniaxial model ferroelectric lithium niobate (LiNbO3; LNO) have been shown to
reach resistances more than 10 orders of magnitude lower than the resistance of
the surrounding bulk, with charge carriers being firmly confined to sheets with
a width of a few nanometers. LNO is thus currently witnessing increased attention
because of its potential in the design of room-temperature nanoelectronic circuits
and devices based on such CDWs. In this context, the reliable determination of
the fundamental transport parameters of LNO CDWs, in particular the 2D charge
carrier density n2D and the Hall mobility μH of the majority carriers, is of great
interest. In this contribution, we present and apply a robust and easy-to-prepare
Hall-effect measurement setup by adapting the standard four-probe van der Pauw
method to contact a single, hexagonally shaped domain wall that fully penetrates
the 200-μm-thick LNO bulk single crystal. We then determine n2D and μH for a set
of external magnetic fields B and prove the expected cosinelike angular dependence
of the Hall voltage. Lastly, we present photoinduced-Hall-effect measurements
of one and the same DW, by determining the impact of super-band-gap illumination
on n2D.
article_number: '064043'
article_type: original
author:
- first_name: Henrik
full_name: Beccard, Henrik
last_name: Beccard
- first_name: Elke
full_name: Beyreuther, Elke
last_name: Beyreuther
- first_name: Benjamin
full_name: Kirbus, Benjamin
last_name: Kirbus
- first_name: Samuel D.
full_name: Seddon, Samuel D.
last_name: Seddon
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
ama: Beccard H, Beyreuther E, Kirbus B, Seddon SD, Rüsing M, Eng LM. Hall mobilities
and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain
wall. Physical Review Applied. 2023;20(6). doi:10.1103/physrevapplied.20.064043
apa: Beccard, H., Beyreuther, E., Kirbus, B., Seddon, S. D., Rüsing, M., & Eng,
L. M. (2023). Hall mobilities and sheet carrier densities in a single LiNbO3 conductive
ferroelectric domain wall. Physical Review Applied, 20(6), Article
064043. https://doi.org/10.1103/physrevapplied.20.064043
bibtex: '@article{Beccard_Beyreuther_Kirbus_Seddon_Rüsing_Eng_2023, title={Hall
mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric
domain wall}, volume={20}, DOI={10.1103/physrevapplied.20.064043},
number={6064043}, journal={Physical Review Applied}, publisher={American Physical
Society (APS)}, author={Beccard, Henrik and Beyreuther, Elke and Kirbus, Benjamin
and Seddon, Samuel D. and Rüsing, Michael and Eng, Lukas M.}, year={2023} }'
chicago: Beccard, Henrik, Elke Beyreuther, Benjamin Kirbus, Samuel D. Seddon, Michael
Rüsing, and Lukas M. Eng. “Hall Mobilities and Sheet Carrier Densities in a Single
LiNbO3 Conductive Ferroelectric Domain Wall.” Physical Review Applied 20,
no. 6 (2023). https://doi.org/10.1103/physrevapplied.20.064043.
ieee: 'H. Beccard, E. Beyreuther, B. Kirbus, S. D. Seddon, M. Rüsing, and L. M.
Eng, “Hall mobilities and sheet carrier densities in a single LiNbO3 conductive
ferroelectric domain wall,” Physical Review Applied, vol. 20, no. 6, Art.
no. 064043, 2023, doi: 10.1103/physrevapplied.20.064043.'
mla: Beccard, Henrik, et al. “Hall Mobilities and Sheet Carrier Densities in a Single
LiNbO3 Conductive Ferroelectric Domain Wall.” Physical Review Applied,
vol. 20, no. 6, 064043, American Physical Society (APS), 2023, doi:10.1103/physrevapplied.20.064043.
short: H. Beccard, E. Beyreuther, B. Kirbus, S.D. Seddon, M. Rüsing, L.M. Eng, Physical
Review Applied 20 (2023).
date_created: 2024-01-09T15:03:22Z
date_updated: 2024-01-09T15:05:29Z
doi: 10.1103/physrevapplied.20.064043
intvolume: ' 20'
issue: '6'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2308.00061.pdf
oa: '1'
publication: Physical Review Applied
publication_identifier:
issn:
- 2331-7019
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric
domain wall
type: journal_article
user_id: '22501'
volume: 20
year: '2023'
...
---
_id: '50731'
abstract:
- lang: eng
text: Eine Forderung nach evidenzbasierter Praxis (EBP) im Bildungswesen kann sowohl
vor dem Hintergrund der Bedeutung wissenschaftlicher Evidenzen innerhalb gesellschaftlicher
Diskurse als auch der Evidenzbasierung in anderen Bereichen formuliert werden.
Der Umgang mit und die Bewertung von Evidenzen stellen somit vor dem Hintergrund
epistemologischer Überzeugungen relevante Aufgaben für den Chemieunterricht dar.
Dabei ist unklar, inwiefern (angehende) Lehrkräfte über Kompetenzen in EBP verfügen.
Bestehende Studien weisen auf einen Bedarf der fachdidaktischen Analyse und Förderung
von Kompetenzen in EBP bei angehenden Lehrkräften hin.Im Rahmen dieser Dissertation
wurde die Domänenspezifität der Kompetenzen in EBP sowie deren Förderung in einem
fachdidaktischen Kontext untersucht. Dabei wurde ein weiterer Schwerpunkt auf
den Umgang mit anomalen Beobachtungen im Sinne widersprüchlicher Evidenzen gelegt.
Innerhalb von drei Teilstudien wurden unterschiedliche methodische Zugänge zur
Kompetenz in EBP auf Grundlage epistemologischer Überzeugungen gewählt.Die Ergebnisse
weisen auf einen Förderbedarf der Kompetenz in EBP für angehende Lehrkräfte aller
Unterrichtsfächer hin. Eine entwickelte Intervention für angehende Chemielehrkräfte
weist eine Wirksamkeit zur Förderung von Kompetenzen in EBP auf. Im Rahmen einer
Modellierungsstudie kann der Einfluss von Fachwissen sowie Indizien für einen
Einfluss epistemologischer Überzeugungen auf den Umgang mit anomalen Beobachtungen
gezeigt werden.
- lang: eng
text: The role of evidence based practice (EBP) in educational contexts can be argued
from the necessity ofevidence for societal debates, as well as evidence based
practice in other research fields, such asmedicine. Therefore, using evidence
based on epistemological beliefs is a relevant task for scienceeducation. However,
i t is unclear whether pre service teachers hold necessary competences in EBP.Existing
research indicates a need for the analysis and promotion of competences in EBP
for pre serviceteachers from a scien ce education perspective.This project aims
at investigating the domainspecificity and promotion of competences in EBP of
preservice teachers. An additional emphasis is put on the reaction to anomalous
observations ascontradictory evidence. Within three sub studies, different methodological
approaches were used togather insights into the competence in EBP from the base
of epistemological beliefs.As results show, there is a need for promotion in competences
in EBP for preservice teachers in allsubjects. Therefore, the developed intervention
for the promotion of pre service chemistry teacherscompetence in EBP shows to
be effective. Moreover, the impact of content knowledge and the role ofepistemological
beliefs on the interpretation of anomalous observations could be demonstrated.
author:
- first_name: Pascal
full_name: Pollmeier, Pascal
id: '44191'
last_name: Pollmeier
citation:
ama: Pollmeier P. Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften
- Epistemologie in der Lehrkräfteausbildung. Universität Paderborn; 2023.
doi:10.17619/UNIPB/1-1869
apa: Pollmeier, P. (2023). Umgang mit Evidenzen angehender Lehrkräfte in den
Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung. Universität
Paderborn. https://doi.org/10.17619/UNIPB/1-1869
bibtex: '@book{Pollmeier_2023, title={Umgang mit Evidenzen angehender Lehrkräfte
in den Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung}, DOI={10.17619/UNIPB/1-1869}, publisher={Universität
Paderborn}, author={Pollmeier, Pascal}, year={2023} }'
chicago: Pollmeier, Pascal. Umgang mit Evidenzen angehender Lehrkräfte in den
Naturwissenschaften - Epistemologie in der Lehrkräfteausbildung. Universität
Paderborn, 2023. https://doi.org/10.17619/UNIPB/1-1869.
ieee: P. Pollmeier, Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften
- Epistemologie in der Lehrkräfteausbildung. Universität Paderborn, 2023.
mla: Pollmeier, Pascal. Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften
- Epistemologie in der Lehrkräfteausbildung. Universität Paderborn, 2023,
doi:10.17619/UNIPB/1-1869.
short: P. Pollmeier, Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften
- Epistemologie in der Lehrkräfteausbildung, Universität Paderborn, 2023.
date_created: 2024-01-22T14:28:52Z
date_updated: 2024-01-22T14:36:17Z
ddc:
- '370'
department:
- _id: '386'
doi: 10.17619/UNIPB/1-1869
file:
- access_level: closed
content_type: application/pdf
creator: pascalp
date_created: 2024-01-22T14:32:38Z
date_updated: 2024-01-22T14:32:38Z
file_id: '50733'
file_name: Dissertation_Pollmeier_Veröffentlichung UB.pdf
file_size: 16219829
relation: main_file
success: 1
file_date_updated: 2024-01-22T14:32:38Z
has_accepted_license: '1'
keyword:
- Epistemologie
- Evidenzen
- evidence-based practice
language:
- iso: ger
page: '357'
publisher: Universität Paderborn
status: public
supervisor:
- first_name: Sabine
full_name: Fechner, Sabine
last_name: Fechner
title: Umgang mit Evidenzen angehender Lehrkräfte in den Naturwissenschaften - Epistemologie
in der Lehrkräfteausbildung
type: dissertation
user_id: '44191'
year: '2023'
...
---
_id: '48277'
abstract:
- lang: eng
text: AbstractCurrently, the fused deposition modeling
(FDM) process is the most common additive manufacturing technology. The principle
of the FDM process is the strand wise deposition of molten thermoplastic polymers,
by feeding a filament trough a heated nozzle. Due to the strand and layer wise
deposition the cooling of the manufactured component is not uniform. This leads
to dimensional deviations which may cause the component to be unusable for the
desired application. In this paper, a method is described which is based on the
shrinkage compensation through the adaption of every single raster line in components
manufactured with the FDM process. The shrinkage compensation is based on a model
resulting from a DOE which considers the main influencing factors on the shrinkage
behavior of raster lines in the FDM process. An in‐house developed software analyzes
the component and locally applies the shrinkage compensation with consideration
of the boundary conditions, e.g., the position of the raster line in the component
and the process parameters. Following, a validation using a simple geometry is
conducted to show the effect of the presented adaptive scaling method.
author:
- first_name: Elmar
full_name: Moritzer, Elmar
id: '20531'
last_name: Moritzer
- first_name: Felix
full_name: Hecker, Felix
id: '45537'
last_name: Hecker
citation:
ama: Moritzer E, Hecker F. Adaptive Scaling of Components in the Fused Deposition
Modeling Process. Macromolecular Symposia. 2023;411(1). doi:10.1002/masy.202200181
apa: Moritzer, E., & Hecker, F. (2023). Adaptive Scaling of Components in the
Fused Deposition Modeling Process. Macromolecular Symposia, 411(1).
https://doi.org/10.1002/masy.202200181
bibtex: '@article{Moritzer_Hecker_2023, title={Adaptive Scaling of Components in
the Fused Deposition Modeling Process}, volume={411}, DOI={10.1002/masy.202200181},
number={1}, journal={Macromolecular Symposia}, publisher={Wiley}, author={Moritzer,
Elmar and Hecker, Felix}, year={2023} }'
chicago: Moritzer, Elmar, and Felix Hecker. “Adaptive Scaling of Components in the
Fused Deposition Modeling Process.” Macromolecular Symposia 411, no. 1
(2023). https://doi.org/10.1002/masy.202200181.
ieee: 'E. Moritzer and F. Hecker, “Adaptive Scaling of Components in the Fused Deposition
Modeling Process,” Macromolecular Symposia, vol. 411, no. 1, 2023, doi:
10.1002/masy.202200181.'
mla: Moritzer, Elmar, and Felix Hecker. “Adaptive Scaling of Components in the Fused
Deposition Modeling Process.” Macromolecular Symposia, vol. 411, no. 1,
Wiley, 2023, doi:10.1002/masy.202200181.
short: E. Moritzer, F. Hecker, Macromolecular Symposia 411 (2023).
conference:
end_date: 2022-11-26
location: Bukarest
name: POLCOM 2022
start_date: 2022-11-13
date_created: 2023-10-19T07:25:06Z
date_updated: 2024-02-23T08:36:42Z
department:
- _id: '9'
- _id: '367'
- _id: '321'
- _id: '219'
- _id: '624'
doi: 10.1002/masy.202200181
intvolume: ' 411'
issue: '1'
keyword:
- Materials Chemistry
- Polymers and Plastics
- Organic Chemistry
- Condensed Matter Physics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1002/masy.202200181
oa: '1'
publication: Macromolecular Symposia
publication_identifier:
issn:
- 1022-1360
- 1521-3900
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Adaptive Scaling of Components in the Fused Deposition Modeling Process
type: journal_article
user_id: '45537'
volume: 411
year: '2023'
...
---
_id: '52122'
article_number: '043152'
author:
- first_name: Usman
full_name: Ali, Usman
last_name: Ali
- first_name: Martin
full_name: Holthaus, Martin
last_name: Holthaus
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: Ali U, Holthaus M, Meier T. Chirped Bloch-harmonic oscillations in a parametrically
forced optical lattice. Physical Review Research. 2023;5(4). doi:10.1103/physrevresearch.5.043152
apa: Ali, U., Holthaus, M., & Meier, T. (2023). Chirped Bloch-harmonic oscillations
in a parametrically forced optical lattice. Physical Review Research, 5(4),
Article 043152. https://doi.org/10.1103/physrevresearch.5.043152
bibtex: '@article{Ali_Holthaus_Meier_2023, title={Chirped Bloch-harmonic oscillations
in a parametrically forced optical lattice}, volume={5}, DOI={10.1103/physrevresearch.5.043152},
number={4043152}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Ali, Usman and Holthaus, Martin and Meier, Torsten}, year={2023}
}'
chicago: Ali, Usman, Martin Holthaus, and Torsten Meier. “Chirped Bloch-Harmonic
Oscillations in a Parametrically Forced Optical Lattice.” Physical Review Research
5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043152.
ieee: 'U. Ali, M. Holthaus, and T. Meier, “Chirped Bloch-harmonic oscillations in
a parametrically forced optical lattice,” Physical Review Research, vol.
5, no. 4, Art. no. 043152, 2023, doi: 10.1103/physrevresearch.5.043152.'
mla: Ali, Usman, et al. “Chirped Bloch-Harmonic Oscillations in a Parametrically
Forced Optical Lattice.” Physical Review Research, vol. 5, no. 4, 043152,
American Physical Society (APS), 2023, doi:10.1103/physrevresearch.5.043152.
short: U. Ali, M. Holthaus, T. Meier, Physical Review Research 5 (2023).
date_created: 2024-02-27T13:57:01Z
date_updated: 2024-02-28T12:53:40Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
doi: 10.1103/physrevresearch.5.043152
intvolume: ' 5'
issue: '4'
keyword:
- General Physics and Astronomy
language:
- iso: eng
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Chirped Bloch-harmonic oscillations in a parametrically forced optical lattice
type: journal_article
user_id: '16199'
volume: 5
year: '2023'
...
---
_id: '52219'
abstract:
- lang: eng
text: AbstractCold‐box sand (CBS) belongs to the
granular materials and consists of sand and a binder. The behavior of CBS is simulated
with a micropolar model, whereby the additional degree of freedom of the model
describes the rotation of the sand grains. The model is used to generate a shear
band under pressure for three different meshes, where the force‐displacement curves
of the three meshes converge so that no mesh dependence occurs. Another requirement
of the model is the consideration of asymmetric behavior for compression and tension.
Due to the additional degree of freedom the implicit implementation of the micropolar
continuum is very time‐consuming. Therefore, an explicit implementation is considered
as an alternative possibility. This paper compares the advantages and disadvantages
of both methods and the results for both calculations.
author:
- first_name: Alexander
full_name: Börger, Alexander
last_name: Börger
- first_name: Rolf
full_name: Mahnken, Rolf
id: '335'
last_name: Mahnken
citation:
ama: Börger A, Mahnken R. A micropolar model accounting for asymmetric behavior
of cold‐box sand in relation to tensile and compression tests. PAMM. Published
online 2023. doi:10.1002/pamm.202300126
apa: Börger, A., & Mahnken, R. (2023). A micropolar model accounting for asymmetric
behavior of cold‐box sand in relation to tensile and compression tests. PAMM.
https://doi.org/10.1002/pamm.202300126
bibtex: '@article{Börger_Mahnken_2023, title={A micropolar model accounting for
asymmetric behavior of cold‐box sand in relation to tensile and compression tests},
DOI={10.1002/pamm.202300126},
journal={PAMM}, publisher={Wiley}, author={Börger, Alexander and Mahnken, Rolf},
year={2023} }'
chicago: Börger, Alexander, and Rolf Mahnken. “A Micropolar Model Accounting for
Asymmetric Behavior of Cold‐box Sand in Relation to Tensile and Compression Tests.”
PAMM, 2023. https://doi.org/10.1002/pamm.202300126.
ieee: 'A. Börger and R. Mahnken, “A micropolar model accounting for asymmetric behavior
of cold‐box sand in relation to tensile and compression tests,” PAMM, 2023,
doi: 10.1002/pamm.202300126.'
mla: Börger, Alexander, and Rolf Mahnken. “A Micropolar Model Accounting for Asymmetric
Behavior of Cold‐box Sand in Relation to Tensile and Compression Tests.” PAMM,
Wiley, 2023, doi:10.1002/pamm.202300126.
short: A. Börger, R. Mahnken, PAMM (2023).
date_created: 2024-02-29T13:59:12Z
date_updated: 2024-02-29T13:59:31Z
department:
- _id: '9'
- _id: '154'
- _id: '321'
doi: 10.1002/pamm.202300126
keyword:
- Electrical and Electronic Engineering
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: PAMM
publication_identifier:
issn:
- 1617-7061
- 1617-7061
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: A micropolar model accounting for asymmetric behavior of cold‐box sand in relation
to tensile and compression tests
type: journal_article
user_id: '335'
year: '2023'
...