---
_id: '19415'
author:
- first_name: Norbert Otto
full_name: Eke, Norbert Otto
id: '104'
last_name: Eke
citation:
ama: 'Eke NO. Heiner Müller. In: Steinecke H, ed. Deutsche Dichter des 20. Jahrhunderts.
Berlin: Erich Schmidt; 1994:726-741.'
apa: 'Eke, N. O. (1994). Heiner Müller. In H. Steinecke (Ed.), Deutsche Dichter
des 20. Jahrhunderts (pp. 726–741). Berlin: Erich Schmidt.'
bibtex: '@inbook{Eke_1994, place={Berlin}, title={Heiner Müller}, booktitle={Deutsche
Dichter des 20. Jahrhunderts}, publisher={Erich Schmidt}, author={Eke, Norbert
Otto}, editor={Steinecke, HartmutEditor}, year={1994}, pages={726–741} }'
chicago: 'Eke, Norbert Otto. “Heiner Müller.” In Deutsche Dichter des 20. Jahrhunderts,
edited by Hartmut Steinecke, 726–41. Berlin: Erich Schmidt, 1994.'
ieee: 'N. O. Eke, “Heiner Müller,” in Deutsche Dichter des 20. Jahrhunderts,
H. Steinecke, Ed. Berlin: Erich Schmidt, 1994, pp. 726–741.'
mla: Eke, Norbert Otto. “Heiner Müller.” Deutsche Dichter des 20. Jahrhunderts,
edited by Hartmut Steinecke, Erich Schmidt, 1994, pp. 726–41.
short: 'N.O. Eke, in: H. Steinecke (Ed.), Deutsche Dichter des 20. Jahrhunderts,
Erich Schmidt, Berlin, 1994, pp. 726–741.'
date_created: 2020-09-15T11:27:05Z
date_updated: 2022-01-06T06:54:03Z
department:
- _id: '465'
editor:
- first_name: Hartmut
full_name: Steinecke, Hartmut
last_name: Steinecke
extern: '1'
language:
- iso: ger
page: 726-741
place: Berlin
publication: Deutsche Dichter des 20. Jahrhunderts
publisher: Erich Schmidt
status: public
title: Heiner Müller
type: book_chapter
user_id: '14932'
year: '1994'
...
---
_id: '31094'
author:
- first_name: Lothar
full_name: van Laak, Lothar
id: '42976'
last_name: van Laak
- first_name: Kathrin
full_name: Bartels, Kathrin
last_name: Bartels
- first_name: Claudia
full_name: Brenig, Claudia
last_name: Brenig
- first_name: Marion
full_name: Prudlo, Marion
last_name: Prudlo
citation:
ama: 'van Laak L, Bartels K, Brenig C, Prudlo M. Michael Hamburgers Übersetzungen
und einige neue Tendenzen in der englisch-sprachigen Hölderlin-Rezeption. In:
Hölderlin-Jahrbuch 29. ; 1994:85-88.'
apa: van Laak, L., Bartels, K., Brenig, C., & Prudlo, M. (1994). Michael Hamburgers
Übersetzungen und einige neue Tendenzen in der englisch-sprachigen Hölderlin-Rezeption.
In Hölderlin-Jahrbuch 29 (pp. 85–88).
bibtex: '@inbook{van Laak_Bartels_Brenig_Prudlo_1994, title={Michael Hamburgers
Übersetzungen und einige neue Tendenzen in der englisch-sprachigen Hölderlin-Rezeption},
booktitle={Hölderlin-Jahrbuch 29}, author={van Laak, Lothar and Bartels, Kathrin
and Brenig, Claudia and Prudlo, Marion}, year={1994}, pages={85–88} }'
chicago: Laak, Lothar van, Kathrin Bartels, Claudia Brenig, and Marion Prudlo. “Michael
Hamburgers Übersetzungen und einige neue Tendenzen in der englisch-sprachigen
Hölderlin-Rezeption.” In Hölderlin-Jahrbuch 29, 85–88, 1994.
ieee: L. van Laak, K. Bartels, C. Brenig, and M. Prudlo, “Michael Hamburgers Übersetzungen
und einige neue Tendenzen in der englisch-sprachigen Hölderlin-Rezeption,” in
Hölderlin-Jahrbuch 29, 1994, pp. 85–88.
mla: van Laak, Lothar, et al. “Michael Hamburgers Übersetzungen und einige neue
Tendenzen in der englisch-sprachigen Hölderlin-Rezeption.” Hölderlin-Jahrbuch
29, 1994, pp. 85–88.
short: 'L. van Laak, K. Bartels, C. Brenig, M. Prudlo, in: Hölderlin-Jahrbuch 29,
1994, pp. 85–88.'
date_created: 2022-05-09T09:45:59Z
date_updated: 2022-05-12T13:05:23Z
department:
- _id: '465'
language:
- iso: ger
page: 85-88
publication: Hölderlin-Jahrbuch 29
status: public
title: Michael Hamburgers Übersetzungen und einige neue Tendenzen in der englisch-sprachigen
Hölderlin-Rezeption
type: book_chapter
user_id: '21240'
year: '1994'
...
---
_id: '35386'
article_type: original
author:
- first_name: D. A.
full_name: Grabowski, D. A.
last_name: Grabowski
- first_name: Claudia
full_name: Schmidt, Claudia
id: '466'
last_name: Schmidt
orcid: 0000-0003-3179-9997
citation:
ama: Grabowski DA, Schmidt C. Simultaneous Measurement of Shear Viscosity and Director
Orientation of a Side-Chain Liquid-Crystalline Polymer by Rheo-NMR. Macromolecules.
1994;27(9):2632-2634. doi:10.1021/ma00087a037
apa: Grabowski, D. A., & Schmidt, C. (1994). Simultaneous Measurement of Shear
Viscosity and Director Orientation of a Side-Chain Liquid-Crystalline Polymer
by Rheo-NMR. Macromolecules, 27(9), 2632–2634. https://doi.org/10.1021/ma00087a037
bibtex: '@article{Grabowski_Schmidt_1994, title={Simultaneous Measurement of Shear
Viscosity and Director Orientation of a Side-Chain Liquid-Crystalline Polymer
by Rheo-NMR}, volume={27}, DOI={10.1021/ma00087a037},
number={9}, journal={Macromolecules}, publisher={American Chemical Society (ACS)},
author={Grabowski, D. A. and Schmidt, Claudia}, year={1994}, pages={2632–2634}
}'
chicago: 'Grabowski, D. A., and Claudia Schmidt. “Simultaneous Measurement of Shear
Viscosity and Director Orientation of a Side-Chain Liquid-Crystalline Polymer
by Rheo-NMR.” Macromolecules 27, no. 9 (1994): 2632–34. https://doi.org/10.1021/ma00087a037.'
ieee: 'D. A. Grabowski and C. Schmidt, “Simultaneous Measurement of Shear Viscosity
and Director Orientation of a Side-Chain Liquid-Crystalline Polymer by Rheo-NMR,”
Macromolecules, vol. 27, no. 9, pp. 2632–2634, 1994, doi: 10.1021/ma00087a037.'
mla: Grabowski, D. A., and Claudia Schmidt. “Simultaneous Measurement of Shear Viscosity
and Director Orientation of a Side-Chain Liquid-Crystalline Polymer by Rheo-NMR.”
Macromolecules, vol. 27, no. 9, American Chemical Society (ACS), 1994,
pp. 2632–34, doi:10.1021/ma00087a037.
short: D.A. Grabowski, C. Schmidt, Macromolecules 27 (1994) 2632–2634.
date_created: 2023-01-06T13:23:23Z
date_updated: 2023-01-07T11:04:57Z
department:
- _id: '2'
- _id: '315'
doi: 10.1021/ma00087a037
extern: '1'
intvolume: ' 27'
issue: '9'
keyword:
- Materials Chemistry
- Inorganic Chemistry
- Polymers and Plastics
- Organic Chemistry
language:
- iso: eng
page: 2632-2634
publication: Macromolecules
publication_identifier:
issn:
- 0024-9297
- 1520-5835
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: Simultaneous Measurement of Shear Viscosity and Director Orientation of a Side-Chain
Liquid-Crystalline Polymer by Rheo-NMR
type: journal_article
user_id: '466'
volume: 27
year: '1994'
...
---
_id: '39565'
author:
- first_name: D.
full_name: Hyhuis, D.
last_name: Hyhuis
- first_name: Wolfgang
full_name: Müller, Wolfgang
id: '16243'
last_name: Müller
citation:
ama: 'Hyhuis D, Müller W. Implementing Simultaneous Design: A Case Study. In: Proceedings
of the 2nd International Conference on Concurrent Engineering & Electronic
Design Automation (CEEDA94). ; 1994.'
apa: 'Hyhuis, D., & Müller, W. (1994). Implementing Simultaneous Design: A Case
Study. Proceedings of the 2nd International Conference on Concurrent Engineering
& Electronic Design Automation (CEEDA94).'
bibtex: '@inproceedings{Hyhuis_Müller_1994, place={PoDTe, UK}, title={Implementing
Simultaneous Design: A Case Study}, booktitle={Proceedings of the 2nd International
Conference on Concurrent Engineering & Electronic Design Automation (CEEDA94)},
author={Hyhuis, D. and Müller, Wolfgang}, year={1994} }'
chicago: 'Hyhuis, D., and Wolfgang Müller. “Implementing Simultaneous Design: A
Case Study.” In Proceedings of the 2nd International Conference on Concurrent
Engineering & Electronic Design Automation (CEEDA94). PoDTe, UK, 1994.'
ieee: 'D. Hyhuis and W. Müller, “Implementing Simultaneous Design: A Case Study,”
1994.'
mla: 'Hyhuis, D., and Wolfgang Müller. “Implementing Simultaneous Design: A Case
Study.” Proceedings of the 2nd International Conference on Concurrent Engineering
& Electronic Design Automation (CEEDA94), 1994.'
short: 'D. Hyhuis, W. Müller, in: Proceedings of the 2nd International Conference
on Concurrent Engineering & Electronic Design Automation (CEEDA94), PoDTe,
UK, 1994.'
date_created: 2023-01-24T12:18:00Z
date_updated: 2023-01-24T12:18:05Z
department:
- _id: '672'
language:
- iso: eng
place: PoDTe, UK
publication: Proceedings of the 2nd International Conference on Concurrent Engineering
& Electronic Design Automation (CEEDA94)
status: public
title: 'Implementing Simultaneous Design: A Case Study'
type: conference
user_id: '5786'
year: '1994'
...
---
_id: '43597'
abstract:
- lang: eng
text: Transient four-wave mixing (TFWM) experiments have been widely used to study
the excitation dynamics of excitons in quantum wells [1]. Recently is has been
observed that TFWM signals, especially quantum beats between heavy-hole (hh) and
light-hole (lh) excitons, strongly depend on the polarization of the incident
laser pulses [2–6]. This dependence is presently being investigated.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: D.
full_name: Bennhardt, D.
last_name: Bennhardt
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: Y.Z.
full_name: Hu, Y.Z.
last_name: Hu
- first_name: R.
full_name: Binder, R.
last_name: Binder
- first_name: S.W.
full_name: Koch, S.W.
last_name: Koch
citation:
ama: 'Meier T, Bennhardt D, Thomas P, Hu YZ, Binder R, Koch SW. Theory of polarization-dependent
four-wave mixing using the optical Bloch equations. In: Phillips RT, ed. Coherent
Optical Interactions in Semiconductors. NATO ASI Series B330. Springer Science+Business
Media; 1994:349-354. doi:10.1007/978-1-4757-9748-0_26'
apa: Meier, T., Bennhardt, D., Thomas, P., Hu, Y. Z., Binder, R., & Koch, S.
W. (1994). Theory of polarization-dependent four-wave mixing using the optical
Bloch equations. In R. T. Phillips (Ed.), Coherent Optical Interactions in
Semiconductors (pp. 349–354). Springer Science+Business Media. https://doi.org/10.1007/978-1-4757-9748-0_26
bibtex: '@inbook{Meier_Bennhardt_Thomas_Hu_Binder_Koch_1994, place={New York}, series={NATO
ASI Series B330}, title={Theory of polarization-dependent four-wave mixing using
the optical Bloch equations}, DOI={10.1007/978-1-4757-9748-0_26},
booktitle={Coherent Optical Interactions in Semiconductors}, publisher={Springer
Science+Business Media}, author={Meier, Torsten and Bennhardt, D. and Thomas,
P. and Hu, Y.Z. and Binder, R. and Koch, S.W.}, editor={Phillips, R.T.}, year={1994},
pages={349–354}, collection={NATO ASI Series B330} }'
chicago: 'Meier, Torsten, D. Bennhardt, P. Thomas, Y.Z. Hu, R. Binder, and S.W.
Koch. “Theory of Polarization-Dependent Four-Wave Mixing Using the Optical Bloch
Equations.” In Coherent Optical Interactions in Semiconductors, edited
by R.T. Phillips, 349–54. NATO ASI Series B330. New York: Springer Science+Business
Media, 1994. https://doi.org/10.1007/978-1-4757-9748-0_26.'
ieee: 'T. Meier, D. Bennhardt, P. Thomas, Y. Z. Hu, R. Binder, and S. W. Koch, “Theory
of polarization-dependent four-wave mixing using the optical Bloch equations,”
in Coherent Optical Interactions in Semiconductors, R. T. Phillips, Ed.
New York: Springer Science+Business Media, 1994, pp. 349–354.'
mla: Meier, Torsten, et al. “Theory of Polarization-Dependent Four-Wave Mixing Using
the Optical Bloch Equations.” Coherent Optical Interactions in Semiconductors,
edited by R.T. Phillips, Springer Science+Business Media, 1994, pp. 349–54, doi:10.1007/978-1-4757-9748-0_26.
short: 'T. Meier, D. Bennhardt, P. Thomas, Y.Z. Hu, R. Binder, S.W. Koch, in: R.T.
Phillips (Ed.), Coherent Optical Interactions in Semiconductors, Springer Science+Business
Media, New York, 1994, pp. 349–354.'
date_created: 2023-04-14T23:42:39Z
date_updated: 2023-04-14T23:42:42Z
department:
- _id: '293'
doi: 10.1007/978-1-4757-9748-0_26
editor:
- first_name: R.T.
full_name: Phillips, R.T.
last_name: Phillips
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://link.springer.com/chapter/10.1007/978-1-4757-9748-0_26
page: 349-354
place: New York
publication: Coherent Optical Interactions in Semiconductors
publication_identifier:
eissn:
- 978-1-4757-9750-3
publication_status: published
publisher: Springer Science+Business Media
series_title: NATO ASI Series B330
status: public
title: Theory of polarization-dependent four-wave mixing using the optical Bloch equations
type: book_chapter
user_id: '49063'
year: '1994'
...
---
_id: '43595'
abstract:
- lang: eng
text: A three-pulse degenerate four-wave-mixing experiment and its theoretical analysis
reveal contributions of local field and biexciton effects to the nonlinear optical
response of the two-dimensional exciton. Quantum beats with a frequency equivalent
to the biexciton binding energy appear only for specific polarizations. Polarization-dependent
spectrally resolved four-wave mixing shows an additional peak that is separated
from the 1s heavy-hole exciton line by the biexciton binding energy. These experimental
results are in good agreement with the optical selection rules of the theoretical
model, providing evidence for biexcitonic contributions to the four-wave mixing.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: E.J.
full_name: Mayer, E.J.
last_name: Mayer
- first_name: V.
full_name: Heuckeroth, V.
last_name: Heuckeroth
- first_name: G.O.
full_name: Smith, G.O.
last_name: Smith
- first_name: J.
full_name: Kuhl, J.
last_name: Kuhl
- first_name: K.
full_name: Bott, K.
last_name: Bott
- first_name: A.
full_name: Schulze, A.
last_name: Schulze
- first_name: D.
full_name: Bennhardt, D.
last_name: Bennhardt
- first_name: S.W.
full_name: Koch, S.W.
last_name: Koch
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: R.
full_name: Hey, R.
last_name: Hey
- first_name: K.
full_name: Ploog, K.
last_name: Ploog
citation:
ama: Meier T, Mayer EJ, Heuckeroth V, et al. Evidence of Biexcitonic Contributions
to Four-wave-mixing in GaAs Quantum Wells. Physical Review B. 1994;50(19):14730-14733.
doi:10.1103/PhysRevB.50.14730
apa: Meier, T., Mayer, E. J., Heuckeroth, V., Smith, G. O., Kuhl, J., Bott, K.,
Schulze, A., Bennhardt, D., Koch, S. W., Thomas, P., Hey, R., & Ploog, K.
(1994). Evidence of Biexcitonic Contributions to Four-wave-mixing in GaAs Quantum
Wells. Physical Review B, 50(19), 14730–14733. https://doi.org/10.1103/PhysRevB.50.14730
bibtex: '@article{Meier_Mayer_Heuckeroth_Smith_Kuhl_Bott_Schulze_Bennhardt_Koch_Thomas_et
al._1994, title={Evidence of Biexcitonic Contributions to Four-wave-mixing in
GaAs Quantum Wells}, volume={50}, DOI={10.1103/PhysRevB.50.14730},
number={19}, journal={Physical Review B}, publisher={American Physical Society},
author={Meier, Torsten and Mayer, E.J. and Heuckeroth, V. and Smith, G.O. and
Kuhl, J. and Bott, K. and Schulze, A. and Bennhardt, D. and Koch, S.W. and Thomas,
P. and et al.}, year={1994}, pages={14730–14733} }'
chicago: 'Meier, Torsten, E.J. Mayer, V. Heuckeroth, G.O. Smith, J. Kuhl, K. Bott,
A. Schulze, et al. “Evidence of Biexcitonic Contributions to Four-Wave-Mixing
in GaAs Quantum Wells.” Physical Review B 50, no. 19 (1994): 14730–33.
https://doi.org/10.1103/PhysRevB.50.14730.'
ieee: 'T. Meier et al., “Evidence of Biexcitonic Contributions to Four-wave-mixing
in GaAs Quantum Wells,” Physical Review B, vol. 50, no. 19, pp. 14730–14733,
1994, doi: 10.1103/PhysRevB.50.14730.'
mla: Meier, Torsten, et al. “Evidence of Biexcitonic Contributions to Four-Wave-Mixing
in GaAs Quantum Wells.” Physical Review B, vol. 50, no. 19, American Physical
Society, 1994, pp. 14730–33, doi:10.1103/PhysRevB.50.14730.
short: T. Meier, E.J. Mayer, V. Heuckeroth, G.O. Smith, J. Kuhl, K. Bott, A. Schulze,
D. Bennhardt, S.W. Koch, P. Thomas, R. Hey, K. Ploog, Physical Review B 50 (1994)
14730–14733.
date_created: 2023-04-14T23:30:20Z
date_updated: 2023-04-14T23:30:22Z
department:
- _id: '293'
doi: 10.1103/PhysRevB.50.14730
extern: '1'
intvolume: ' 50'
issue: '19'
language:
- iso: eng
main_file_link:
- url: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.50.14730
page: 14730-14733
publication: Physical Review B
publication_status: published
publisher: American Physical Society
status: public
title: Evidence of Biexcitonic Contributions to Four-wave-mixing in GaAs Quantum Wells
type: journal_article
user_id: '49063'
volume: 50
year: '1994'
...
---
_id: '44283'
abstract:
- lang: eng
text: "The strong influence of exciton/exciton interaction on the nonlinear optical
response of the 2D exciton in GaAs quantum wells has been demonstrated in several
recent experimental studies. The theoretical model for the microscopic coupling
mechanism is still the subject of controversy, however. In ref. [1], we have presented
a model including a density dependent coupling between opposite spin excitons
which assumes that the interaction results in a renormalization of the matrix
elements, dephasing rates and energies of the transition from the single-exciton
state to the two-exciton state with respect to the corresponding quantities for
the single exciton transitions. In contrast, Wang et al. claim that all experimental
observations are explained by a density induced dephasing rate and that biexciton
states play no role [2]. Here we present a new 3-pulse degenerate-four-wave-mixing
(DFWM) configuration which is able to differentiate between pure local field effects
and biexcitonic contributions to the time-integrated signal. Experiments were
performed on an almost homogeneously broadened GaAs/Al0.3Ga0.7As single QW (well
width 20 nm, photoluminescence line 0.3 meV, homogenous linewidth 0.15 meV) in
the backward reflection geometry. The sample was cooled to 10 K and excited by
a sequence of three pulses (1.1 ps duration) with equal intensity, wave vectors
\U0001D458→1,\U0001D458→2,\U0001D458→3\r\n and delays τ12 and τ13 between the
second and first and the third and first pulse, respectively. The signal was monitored
in the direction \U0001D458→\U0001D460=\U0001D458→1+\U0001D458→2−\U0001D458→3\r\n
which provides no signal for the chosen pulse length if local field and renormalization
effects are negligible. The peak intensity of the time-integrated DFWM signal
has been calculated by solving the optical Bloch for a system of two non-interacting
two-level systems (2LS) with opposite circular polarization selection rules (local
field effect) and for the renormalized four-level system (4LS) depicted in Fig.
1 which assumes the formation of biexcitons between excitons with opposite spins.
The signal strength is proportional to the strength of the local field in the
case of the 2LS and to the renormalization for the 4LS. The peak signal intensities
expected for pure local field and pure biexction contributions are summarized
in the second and third column of Table 1 for eight experimental configurations
applying different linear and circularly polarized pulses. The values are normalized
to the signal strength predicted for three parallel linearly polarized pulses.
Close inspection of the data reveals remarkable differences of the peak amplitude
with polarization geometry for the two coupling models."
article_number: MD.5
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: J.
full_name: Kuhl, J.
last_name: Kuhl
- first_name: E.J.
full_name: Mayer, E.J.
last_name: Mayer
- first_name: G.O.
full_name: Smith, G.O.
last_name: Smith
- first_name: D.
full_name: Bennhardt, D.
last_name: Bennhardt
- first_name: A.
full_name: Schulze, A.
last_name: Schulze
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: R.
full_name: Hey, R.
last_name: Hey
- first_name: K.
full_name: Ploog, K.
last_name: Ploog
citation:
ama: 'Meier T, Kuhl J, Mayer EJ, et al. Contributions of Bound and Unbound Two-Exciton
States to the Nonlinear Optical Response of GaAs Quantum Wells. In: International
Conference on Ultrafast Phenomena. ; 1994. doi:10.1364/UP.1994.MD.5'
apa: Meier, T., Kuhl, J., Mayer, E. J., Smith, G. O., Bennhardt, D., Schulze, A.,
Thomas, P., Hey, R., & Ploog, K. (1994). Contributions of Bound and Unbound
Two-Exciton States to the Nonlinear Optical Response of GaAs Quantum Wells. International
Conference on Ultrafast Phenomena, Article MD.5. International Conference
on Ultrafast Phenomena 1994, California, United States. https://doi.org/10.1364/UP.1994.MD.5
bibtex: '@inproceedings{Meier_Kuhl_Mayer_Smith_Bennhardt_Schulze_Thomas_Hey_Ploog_1994,
title={Contributions of Bound and Unbound Two-Exciton States to the Nonlinear
Optical Response of GaAs Quantum Wells}, DOI={10.1364/UP.1994.MD.5},
number={MD.5}, booktitle={International Conference on Ultrafast Phenomena}, author={Meier,
Torsten and Kuhl, J. and Mayer, E.J. and Smith, G.O. and Bennhardt, D. and Schulze,
A. and Thomas, P. and Hey, R. and Ploog, K.}, year={1994} }'
chicago: Meier, Torsten, J. Kuhl, E.J. Mayer, G.O. Smith, D. Bennhardt, A. Schulze,
P. Thomas, R. Hey, and K. Ploog. “Contributions of Bound and Unbound Two-Exciton
States to the Nonlinear Optical Response of GaAs Quantum Wells.” In International
Conference on Ultrafast Phenomena, 1994. https://doi.org/10.1364/UP.1994.MD.5.
ieee: 'T. Meier et al., “Contributions of Bound and Unbound Two-Exciton States
to the Nonlinear Optical Response of GaAs Quantum Wells,” presented at the International
Conference on Ultrafast Phenomena 1994, California, United States, 1994, doi:
10.1364/UP.1994.MD.5.'
mla: Meier, Torsten, et al. “Contributions of Bound and Unbound Two-Exciton States
to the Nonlinear Optical Response of GaAs Quantum Wells.” International Conference
on Ultrafast Phenomena, MD.5, 1994, doi:10.1364/UP.1994.MD.5.
short: 'T. Meier, J. Kuhl, E.J. Mayer, G.O. Smith, D. Bennhardt, A. Schulze, P.
Thomas, R. Hey, K. Ploog, in: International Conference on Ultrafast Phenomena,
1994.'
conference:
end_date: 1994-05-06
location: California, United States
name: International Conference on Ultrafast Phenomena 1994
start_date: 1994-05-02
date_created: 2023-05-01T11:36:11Z
date_updated: 2023-05-01T11:36:15Z
department:
- _id: '293'
doi: 10.1364/UP.1994.MD.5
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://opg.optica.org/abstract.cfm?uri=UP-1994-MD.5
publication: International Conference on Ultrafast Phenomena
publication_status: published
status: public
title: Contributions of Bound and Unbound Two-Exciton States to the Nonlinear Optical
Response of GaAs Quantum Wells
type: conference
user_id: '49063'
year: '1994'
...
---
_id: '44284'
abstract:
- lang: eng
text: Several recent experimental and theoretical studies have demonstrated the
importance of exciton/exciton coupling due to Coulomb interactions for the nonlinear
optical response of the 2D exciton in GaAs quantum wells (QWs).1,2 These results
imply that multilevel models are required in order to provide a theoretically
appropriate description of the nonlinear behavior. Previous application of a renormalized
9-level system has proven successful in describing the third-order response of
hh-excitons in GaAs quantum wells.2 We present a comprehensive experimental and
theoretical investigation of the polarization selection rules for degenerate-
four-wave-mixing (DFWM) and quantum beating of hh and lh transitions in a GaAs
QW. Depending on the polarization and temporal sequence of the three pulses simultaneous
excitation of the hh and lh transitions generates either quantum beats (QB), no
modulation of the signal, or a superposition of QB and polarization interference
(PI) effects as proved by spectrally resolved (SR)-DFWM.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: E.J.
full_name: Mayer, E.J.
last_name: Mayer
- first_name: G.O.
full_name: Smith, G.O.
last_name: Smith
- first_name: J.
full_name: Kuhl, J.
last_name: Kuhl
- first_name: A.
full_name: Schulze, A.
last_name: Schulze
- first_name: D.
full_name: Bennhardt, D.
last_name: Bennhardt
- first_name: S.W.
full_name: Koch, S.W.
last_name: Koch
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: R.
full_name: Hey, R.
last_name: Hey
- first_name: K.
full_name: Ploog, K.
last_name: Ploog
citation:
ama: 'Meier T, Mayer EJ, Smith GO, et al. Polarization selection rules for quantum
beating between light and heavy holes in GaAs quantum wells. In: Proceedings
of the 5th European Quantum Electronics Conference. ; 1994:187-188.'
apa: Meier, T., Mayer, E. J., Smith, G. O., Kuhl, J., Schulze, A., Bennhardt, D.,
Koch, S. W., Thomas, P., Hey, R., & Ploog, K. (1994). Polarization selection
rules for quantum beating between light and heavy holes in GaAs quantum wells.
Proceedings of the 5th European Quantum Electronics Conference, 187–188.
bibtex: '@inproceedings{Meier_Mayer_Smith_Kuhl_Schulze_Bennhardt_Koch_Thomas_Hey_Ploog_1994,
title={Polarization selection rules for quantum beating between light and heavy
holes in GaAs quantum wells}, booktitle={Proceedings of the 5th European Quantum
Electronics Conference}, author={Meier, Torsten and Mayer, E.J. and Smith, G.O.
and Kuhl, J. and Schulze, A. and Bennhardt, D. and Koch, S.W. and Thomas, P. and
Hey, R. and Ploog, K.}, year={1994}, pages={187–188} }'
chicago: Meier, Torsten, E.J. Mayer, G.O. Smith, J. Kuhl, A. Schulze, D. Bennhardt,
S.W. Koch, P. Thomas, R. Hey, and K. Ploog. “Polarization Selection Rules for
Quantum Beating between Light and Heavy Holes in GaAs Quantum Wells.” In Proceedings
of the 5th European Quantum Electronics Conference, 187–88, 1994.
ieee: T. Meier et al., “Polarization selection rules for quantum beating
between light and heavy holes in GaAs quantum wells,” in Proceedings of the
5th European Quantum Electronics Conference, Amsterdam, Netherlands, 1994,
pp. 187–188.
mla: Meier, Torsten, et al. “Polarization Selection Rules for Quantum Beating between
Light and Heavy Holes in GaAs Quantum Wells.” Proceedings of the 5th European
Quantum Electronics Conference, 1994, pp. 187–88.
short: 'T. Meier, E.J. Mayer, G.O. Smith, J. Kuhl, A. Schulze, D. Bennhardt, S.W.
Koch, P. Thomas, R. Hey, K. Ploog, in: Proceedings of the 5th European Quantum
Electronics Conference, 1994, pp. 187–188.'
conference:
end_date: 1994-09-02
location: Amsterdam, Netherlands
name: European Quantum Electronics Conference 1994
start_date: 1994-08-28
date_created: 2023-05-01T11:41:01Z
date_updated: 2023-05-01T11:41:04Z
department:
- _id: '293'
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://opg.optica.org/abstract.cfm?uri=EQEC-1994-QThB4
page: 187-188
publication: Proceedings of the 5th European Quantum Electronics Conference
publication_status: published
status: public
title: Polarization selection rules for quantum beating between light and heavy holes
in GaAs quantum wells
type: conference
user_id: '49063'
year: '1994'
...
---
_id: '44282'
abstract:
- lang: eng
text: Although the importance of exciton/exciton interactions for the nonlinear
optical response of GaAs quantum wells (QW) is well established by many experimental
observations, the role of biexciton states in these processes is still an open
question, even at low excitation densities. Evidence for the formation of biexcitons
has been independently derived from pump-probe studies [1], from the density dependence
of the photoluminescence (PL) line shape [2] and from signal modulations observed
in degenerate-four-wave-mixing (DFWM) with incoherent light pulses [3]. Here,
we report on time-resolved DFWM with parallel (PP) and cross-polarized (CP) pulses.
Depending on the polarization geometry, the signals reveal strong quantum beats
which correspond to the splitting between either the heavy hole (hh) and light
hole (lh) exciton or the hh exciton and the biexciton.
article_number: ThD.22
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: E.J.
full_name: Mayer, E.J.
last_name: Mayer
- first_name: G.O.
full_name: Smith, G.O.
last_name: Smith
- first_name: J.
full_name: Kuhl, J.
last_name: Kuhl
- first_name: D.
full_name: Bennhardt, D.
last_name: Bennhardt
- first_name: A.
full_name: Schulze, A.
last_name: Schulze
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: R.
full_name: Hey, R.
last_name: Hey
- first_name: K.
full_name: Ploog, K.
last_name: Ploog
citation:
ama: 'Meier T, Mayer EJ, Smith GO, et al. Observation of Biexcitons in Time-Resolved
Degenerate-Four-Wave-Mixing on GaAs Quantum Wells. In: International Conference
on Ultrafast Phenomena. ; 1994.'
apa: Meier, T., Mayer, E. J., Smith, G. O., Kuhl, J., Bennhardt, D., Schulze, A.,
Thomas, P., Hey, R., & Ploog, K. (1994). Observation of Biexcitons in Time-Resolved
Degenerate-Four-Wave-Mixing on GaAs Quantum Wells. International Conference
on Ultrafast Phenomena, Article ThD.22. International Conference on Ultrafast
Phenomena 1994, California, United States.
bibtex: '@inproceedings{Meier_Mayer_Smith_Kuhl_Bennhardt_Schulze_Thomas_Hey_Ploog_1994,
title={Observation of Biexcitons in Time-Resolved Degenerate-Four-Wave-Mixing
on GaAs Quantum Wells}, number={ThD.22}, booktitle={International Conference on
Ultrafast Phenomena}, author={Meier, Torsten and Mayer, E.J. and Smith, G.O. and
Kuhl, J. and Bennhardt, D. and Schulze, A. and Thomas, P. and Hey, R. and Ploog,
K.}, year={1994} }'
chicago: Meier, Torsten, E.J. Mayer, G.O. Smith, J. Kuhl, D. Bennhardt, A. Schulze,
P. Thomas, R. Hey, and K. Ploog. “Observation of Biexcitons in Time-Resolved Degenerate-Four-Wave-Mixing
on GaAs Quantum Wells.” In International Conference on Ultrafast Phenomena,
1994.
ieee: T. Meier et al., “Observation of Biexcitons in Time-Resolved Degenerate-Four-Wave-Mixing
on GaAs Quantum Wells,” presented at the International Conference on Ultrafast
Phenomena 1994, California, United States, 1994.
mla: Meier, Torsten, et al. “Observation of Biexcitons in Time-Resolved Degenerate-Four-Wave-Mixing
on GaAs Quantum Wells.” International Conference on Ultrafast Phenomena,
ThD.22, 1994.
short: 'T. Meier, E.J. Mayer, G.O. Smith, J. Kuhl, D. Bennhardt, A. Schulze, P.
Thomas, R. Hey, K. Ploog, in: International Conference on Ultrafast Phenomena,
1994.'
conference:
end_date: 1994-05-06
location: California, United States
name: International Conference on Ultrafast Phenomena 1994
start_date: 1994-05-02
date_created: 2023-05-01T11:33:22Z
date_updated: 2023-05-01T11:33:25Z
department:
- _id: '293'
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://opg.optica.org/abstract.cfm?uri=UP-1994-ThD.22
publication: International Conference on Ultrafast Phenomena
publication_status: published
status: public
title: Observation of Biexcitons in Time-Resolved Degenerate-Four-Wave-Mixing on GaAs
Quantum Wells
type: conference
user_id: '49063'
year: '1994'
...
---
_id: '44279'
abstract:
- lang: eng
text: The strong nonlinear optical response of the 2D exciton in GaAs quantum wells
at relatively low excitation densities has been observed in many experimental
studies in accordance with theoretical predictions. In principle, exciton/exciton
interaction results in a renormalization of the transition matrix elements, dephasing
rates and frequencies of the excitonic states. Wang et al.1 claimed that all experimental
results can be explained by a density- induced enhanced dephasing rate. In a previous
paper,2 we have suggested a density dependent coupling between opposite spin excitons,
which involves all three renormalization phenomena.
article_number: QThB5
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: G.O.
full_name: Smith, G.O.
last_name: Smith
- first_name: E.J.
full_name: Mayer, E.J.
last_name: Mayer
- first_name: J.
full_name: Kuhl, J.
last_name: Kuhl
- first_name: A.
full_name: Schulze, A.
last_name: Schulze
- first_name: D.
full_name: Bennhardt, D.
last_name: Bennhardt
- first_name: S.W.
full_name: Koch, S.W.
last_name: Koch
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: R.
full_name: Hey, R.
last_name: Hey
- first_name: K.
full_name: Ploog, K.
last_name: Ploog
citation:
ama: 'Meier T, Smith GO, Mayer EJ, et al. Direct verification of the existence of
biexcitons in GaAs qauntum wells. In: European Quantum Electronics Conference.
; 1994.'
apa: Meier, T., Smith, G. O., Mayer, E. J., Kuhl, J., Schulze, A., Bennhardt, D.,
Koch, S. W., Thomas, P., Hey, R., & Ploog, K. (1994). Direct verification
of the existence of biexcitons in GaAs qauntum wells. European Quantum Electronics
Conference, Article QThB5. European Quantum Electronics Conference 1994, Amsterdam,
Netherlands.
bibtex: '@inproceedings{Meier_Smith_Mayer_Kuhl_Schulze_Bennhardt_Koch_Thomas_Hey_Ploog_1994,
title={Direct verification of the existence of biexcitons in GaAs qauntum wells},
number={QThB5}, booktitle={European Quantum Electronics Conference}, author={Meier,
Torsten and Smith, G.O. and Mayer, E.J. and Kuhl, J. and Schulze, A. and Bennhardt,
D. and Koch, S.W. and Thomas, P. and Hey, R. and Ploog, K.}, year={1994} }'
chicago: Meier, Torsten, G.O. Smith, E.J. Mayer, J. Kuhl, A. Schulze, D. Bennhardt,
S.W. Koch, P. Thomas, R. Hey, and K. Ploog. “Direct Verification of the Existence
of Biexcitons in GaAs Qauntum Wells.” In European Quantum Electronics Conference,
1994.
ieee: T. Meier et al., “Direct verification of the existence of biexcitons
in GaAs qauntum wells,” presented at the European Quantum Electronics Conference
1994, Amsterdam, Netherlands, 1994.
mla: Meier, Torsten, et al. “Direct Verification of the Existence of Biexcitons
in GaAs Qauntum Wells.” European Quantum Electronics Conference, QThB5,
1994.
short: 'T. Meier, G.O. Smith, E.J. Mayer, J. Kuhl, A. Schulze, D. Bennhardt, S.W.
Koch, P. Thomas, R. Hey, K. Ploog, in: European Quantum Electronics Conference,
1994.'
conference:
end_date: 1994-09-02
location: Amsterdam, Netherlands
name: European Quantum Electronics Conference 1994
start_date: 1994-08-28
date_created: 2023-05-01T11:25:13Z
date_updated: 2023-05-01T11:25:17Z
department:
- _id: '293'
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://opg.optica.org/abstract.cfm?uri=EQEC-1994-QThB5
publication: European Quantum Electronics Conference
publication_status: published
status: public
title: Direct verification of the existence of biexcitons in GaAs qauntum wells
type: conference
user_id: '49063'
year: '1994'
...
---
_id: '16518'
author:
- first_name: Ernest
full_name: Barany, Ernest
last_name: Barany
- first_name: Michael
full_name: Dellnitz, Michael
last_name: Dellnitz
- first_name: Martin
full_name: Golubitsky, Martin
last_name: Golubitsky
citation:
ama: 'Barany E, Dellnitz M, Golubitsky M. Detecting the symmetry of attractors.
Physica D: Nonlinear Phenomena. 1993:66-87. doi:10.1016/0167-2789(93)90198-a'
apa: 'Barany, E., Dellnitz, M., & Golubitsky, M. (1993). Detecting the symmetry
of attractors. Physica D: Nonlinear Phenomena, 66–87. https://doi.org/10.1016/0167-2789(93)90198-a'
bibtex: '@article{Barany_Dellnitz_Golubitsky_1993, title={Detecting the symmetry
of attractors}, DOI={10.1016/0167-2789(93)90198-a},
journal={Physica D: Nonlinear Phenomena}, author={Barany, Ernest and Dellnitz,
Michael and Golubitsky, Martin}, year={1993}, pages={66–87} }'
chicago: 'Barany, Ernest, Michael Dellnitz, and Martin Golubitsky. “Detecting the
Symmetry of Attractors.” Physica D: Nonlinear Phenomena, 1993, 66–87. https://doi.org/10.1016/0167-2789(93)90198-a.'
ieee: 'E. Barany, M. Dellnitz, and M. Golubitsky, “Detecting the symmetry of attractors,”
Physica D: Nonlinear Phenomena, pp. 66–87, 1993.'
mla: 'Barany, Ernest, et al. “Detecting the Symmetry of Attractors.” Physica
D: Nonlinear Phenomena, 1993, pp. 66–87, doi:10.1016/0167-2789(93)90198-a.'
short: 'E. Barany, M. Dellnitz, M. Golubitsky, Physica D: Nonlinear Phenomena (1993)
66–87.'
date_created: 2020-04-15T08:02:09Z
date_updated: 2022-01-06T06:52:52Z
department:
- _id: '101'
doi: 10.1016/0167-2789(93)90198-a
language:
- iso: eng
page: 66-87
publication: 'Physica D: Nonlinear Phenomena'
publication_identifier:
issn:
- 0167-2789
publication_status: published
status: public
title: Detecting the symmetry of attractors
type: journal_article
user_id: '15701'
year: '1993'
...
---
_id: '16828'
author:
- first_name: Gitta
full_name: Domik, Gitta
id: '90'
last_name: Domik
citation:
ama: 'Domik G. Education in Scientific Visualization. In: D. Franklin S, R. Stubberud
A, P. Wiedeman L, eds. University Education Uses of Visualization in Scientific
Computing, Proceedings of the {IFIP} {WG3.2} Working Conference on Visualization
in Scientific Computing: Uses in University Education, Irvine, CA, USA, 28-30
July, 1993. Vol {A-48}. {IFIP} Transactions. North-Holland; 1993:25-32.'
apa: 'Domik, G. (1993). Education in Scientific Visualization. In S. D. Franklin,
A. R. Stubberud, & L. P. Wiedeman (Eds.), University Education Uses of
Visualization in Scientific Computing, Proceedings of the {IFIP} {WG3.2} Working
Conference on Visualization in Scientific Computing: Uses in University Education,
Irvine, CA, USA, 28-30 July, 1993 (Vol. {A-48}, pp. 25–32). North-Holland.'
bibtex: '@inproceedings{Domik_1993, series={{IFIP} Transactions}, title={Education
in Scientific Visualization}, volume={{A-48}}, booktitle={University Education
Uses of Visualization in Scientific Computing, Proceedings of the {IFIP} {WG3.2}
Working Conference on Visualization in Scientific Computing: Uses in University
Education, Irvine, CA, USA, 28-30 July, 1993}, publisher={North-Holland}, author={Domik,
Gitta}, editor={D. Franklin, Stephen and R. Stubberud, Allen and P. Wiedeman,
LyleEditors}, year={1993}, pages={25–32}, collection={{IFIP} Transactions} }'
chicago: 'Domik, Gitta. “Education in Scientific Visualization.” In University
Education Uses of Visualization in Scientific Computing, Proceedings of the {IFIP}
{WG3.2} Working Conference on Visualization in Scientific Computing: Uses in University
Education, Irvine, CA, USA, 28-30 July, 1993, edited by Stephen D. Franklin,
Allen R. Stubberud, and Lyle P. Wiedeman, {A-48}:25–32. {IFIP} Transactions. North-Holland,
1993.'
ieee: 'G. Domik, “Education in Scientific Visualization,” in University Education
Uses of Visualization in Scientific Computing, Proceedings of the {IFIP} {WG3.2}
Working Conference on Visualization in Scientific Computing: Uses in University
Education, Irvine, CA, USA, 28-30 July, 1993, 1993, vol. {A-48}, pp. 25–32.'
mla: 'Domik, Gitta. “Education in Scientific Visualization.” University Education
Uses of Visualization in Scientific Computing, Proceedings of the {IFIP} {WG3.2}
Working Conference on Visualization in Scientific Computing: Uses in University
Education, Irvine, CA, USA, 28-30 July, 1993, edited by Stephen D. Franklin
et al., vol. {A-48}, North-Holland, 1993, pp. 25–32.'
short: 'G. Domik, in: S. D. Franklin, A. R. Stubberud, L. P. Wiedeman (Eds.), University
Education Uses of Visualization in Scientific Computing, Proceedings of the {IFIP}
{WG3.2} Working Conference on Visualization in Scientific Computing: Uses in University
Education, Irvine, CA, USA, 28-30 July, 1993, North-Holland, 1993, pp. 25–32.'
date_created: 2020-04-23T07:40:22Z
date_updated: 2022-01-06T06:52:57Z
department:
- _id: '65'
editor:
- first_name: Stephen
full_name: D. Franklin, Stephen
last_name: D. Franklin
- first_name: Allen
full_name: R. Stubberud, Allen
last_name: R. Stubberud
- first_name: Lyle
full_name: P. Wiedeman, Lyle
last_name: P. Wiedeman
language:
- iso: eng
page: 25-32
publication: 'University Education Uses of Visualization in Scientific Computing,
Proceedings of the {IFIP} {WG3.2} Working Conference on Visualization in Scientific
Computing: Uses in University Education, Irvine, CA, USA, 28-30 July, 1993'
publisher: North-Holland
series_title: '{IFIP} Transactions'
status: public
title: Education in Scientific Visualization
type: conference
user_id: '14955'
volume: '{A-48}'
year: '1993'
...
---
_id: '11788'
abstract:
- lang: eng
text: Four methods were used to reduce the error rate of a continuous-density hidden
Markov-model-based speech recognizer on the TI/NIST connected-digits recognition
task. Energy thresholding sets a lower limit on the energy in each frequency channel
to suppress spurious distortion accumulation caused by random noise. This led
to an improvement in error rate by 15%. Spectrum normalization was used to compensate
for across-speaker variations, resulting in an additional improvement by 20%.
The acoustic resolution was increased up to 32 component densities per mixture.
Each doubling of the number of component densities yielded a reduction in error
rate by roughly 20%. Linear discriminant analysis was used for improved feature
selection. A single class-independent transformation matrix was applied to a large
input vector consisting of several adjacent frames, resulting in an improvement
by 20% for high acoustic resolution. The final string error rate was 0.84%.
author:
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
- first_name: Dieter
full_name: Geller, Dieter
last_name: Geller
- first_name: Hermann
full_name: Ney, Hermann
last_name: Ney
citation:
ama: 'Haeb-Umbach R, Geller D, Ney H. Improvements in Connected Digit Recognition
Using Linear Discriminant Analysis and Mixture Densities. In: ICASSP, Minneapolis.
; 1993.'
apa: Haeb-Umbach, R., Geller, D., & Ney, H. (1993). Improvements in Connected
Digit Recognition Using Linear Discriminant Analysis and Mixture Densities. In
ICASSP, Minneapolis.
bibtex: '@inproceedings{Haeb-Umbach_Geller_Ney_1993, title={Improvements in Connected
Digit Recognition Using Linear Discriminant Analysis and Mixture Densities}, booktitle={ICASSP,
Minneapolis}, author={Haeb-Umbach, Reinhold and Geller, Dieter and Ney, Hermann},
year={1993} }'
chicago: Haeb-Umbach, Reinhold, Dieter Geller, and Hermann Ney. “Improvements in
Connected Digit Recognition Using Linear Discriminant Analysis and Mixture Densities.”
In ICASSP, Minneapolis, 1993.
ieee: R. Haeb-Umbach, D. Geller, and H. Ney, “Improvements in Connected Digit Recognition
Using Linear Discriminant Analysis and Mixture Densities,” in ICASSP, Minneapolis,
1993.
mla: Haeb-Umbach, Reinhold, et al. “Improvements in Connected Digit Recognition
Using Linear Discriminant Analysis and Mixture Densities.” ICASSP, Minneapolis,
1993.
short: 'R. Haeb-Umbach, D. Geller, H. Ney, in: ICASSP, Minneapolis, 1993.'
date_created: 2019-07-12T05:28:16Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/1993/ICASSP_1993_Haeb_paper.pdf
oa: '1'
publication: ICASSP, Minneapolis
status: public
title: Improvements in Connected Digit Recognition Using Linear Discriminant Analysis
and Mixture Densities
type: conference
user_id: '44006'
year: '1993'
...
---
_id: '17831'
author:
- first_name: Volker
full_name: Peckhaus, Volker
id: '391'
last_name: Peckhaus
citation:
ama: 'Peckhaus V. The Development of Ernst Schröder’s Attitude towards Logic [Abstract].
In: Hormigon M, Ausejo E, Dhombres J, eds. XIXth International Congress of
History of Science. 22–29 August 1993 Zaragoza (Spain). Book of Abstracts Symposia.
Vol Nr. 4.2. ; 1993.'
apa: 'Peckhaus, V. (1993). The Development of Ernst Schröder’s Attitude towards
Logic [Abstract]. In M. Hormigon, E. Ausejo, & J. Dhombres (Eds.), XIXth
International Congress of History of Science. 22–29 August 1993 Zaragoza (Spain).
Book of Abstracts Symposia: Vol. Nr. 4.2.'
bibtex: '@inproceedings{Peckhaus_1993, place={o.O.u.J. (Zaragoza)}, title={The Development
of Ernst Schröder’s Attitude towards Logic [Abstract]}, volume={Nr. 4.2}, booktitle={XIXth
International Congress of History of Science. 22–29 August 1993 Zaragoza (Spain).
Book of Abstracts Symposia}, author={Peckhaus, Volker}, editor={Hormigon, Mariano
and Ausejo, Elena and Dhombres, Jean}, year={1993} }'
chicago: Peckhaus, Volker. “The Development of Ernst Schröder’s Attitude towards
Logic [Abstract].” In XIXth International Congress of History of Science. 22–29
August 1993 Zaragoza (Spain). Book of Abstracts Symposia, edited by Mariano
Hormigon, Elena Ausejo, and Jean Dhombres, Vol. Nr. 4.2. o.O.u.J. (Zaragoza),
1993.
ieee: V. Peckhaus, “The Development of Ernst Schröder’s Attitude towards Logic [Abstract],”
in XIXth International Congress of History of Science. 22–29 August 1993 Zaragoza
(Spain). Book of Abstracts Symposia, 1993, vol. Nr. 4.2.
mla: Peckhaus, Volker. “The Development of Ernst Schröder’s Attitude towards Logic
[Abstract].” XIXth International Congress of History of Science. 22–29 August
1993 Zaragoza (Spain). Book of Abstracts Symposia, edited by Mariano Hormigon
et al., vol. Nr. 4.2, 1993.
short: 'V. Peckhaus, in: M. Hormigon, E. Ausejo, J. Dhombres (Eds.), XIXth International
Congress of History of Science. 22–29 August 1993 Zaragoza (Spain). Book of Abstracts
Symposia, o.O.u.J. (Zaragoza), 1993.'
date_created: 2020-08-12T07:17:23Z
date_updated: 2022-04-20T13:50:36Z
department:
- _id: '520'
editor:
- first_name: Mariano
full_name: Hormigon, Mariano
last_name: Hormigon
- first_name: Elena
full_name: Ausejo, Elena
last_name: Ausejo
- first_name: Jean
full_name: Dhombres, Jean
last_name: Dhombres
extern: '1'
language:
- iso: eng
place: o.O.u.J. (Zaragoza)
publication: XIXth International Congress of History of Science. 22–29 August 1993
Zaragoza (Spain). Book of Abstracts Symposia
status: public
title: The Development of Ernst Schröder’s Attitude towards Logic [Abstract]
type: conference_abstract
user_id: '59882'
volume: Nr. 4.2
year: '1993'
...
---
_id: '40324'
author:
- first_name: D.
full_name: Krüerke, D.
last_name: Krüerke
- first_name: Heinz-Siegfried
full_name: Kitzerow, Heinz-Siegfried
id: '254'
last_name: Kitzerow
- first_name: G.
full_name: Heppke, G.
last_name: Heppke
- first_name: V.
full_name: Vill, V.
last_name: Vill
citation:
ama: Krüerke D, Kitzerow H-S, Heppke G, Vill V. First Observation of Selective Reflection
and Blue Phases in Chiral Discotic Liquid Crystals. Berichte der Bunsengesellschaft
für physikalische Chemie. 1993;97(10):1371-1375. doi:10.1002/bbpc.19930971032
apa: Krüerke, D., Kitzerow, H.-S., Heppke, G., & Vill, V. (1993). First Observation
of Selective Reflection and Blue Phases in Chiral Discotic Liquid Crystals. Berichte
Der Bunsengesellschaft Für Physikalische Chemie, 97(10), 1371–1375.
https://doi.org/10.1002/bbpc.19930971032
bibtex: '@article{Krüerke_Kitzerow_Heppke_Vill_1993, title={First Observation of
Selective Reflection and Blue Phases in Chiral Discotic Liquid Crystals}, volume={97},
DOI={10.1002/bbpc.19930971032},
number={10}, journal={Berichte der Bunsengesellschaft für physikalische Chemie},
publisher={Wiley}, author={Krüerke, D. and Kitzerow, Heinz-Siegfried and Heppke,
G. and Vill, V.}, year={1993}, pages={1371–1375} }'
chicago: 'Krüerke, D., Heinz-Siegfried Kitzerow, G. Heppke, and V. Vill. “First
Observation of Selective Reflection and Blue Phases in Chiral Discotic Liquid
Crystals.” Berichte Der Bunsengesellschaft Für Physikalische Chemie 97,
no. 10 (1993): 1371–75. https://doi.org/10.1002/bbpc.19930971032.'
ieee: 'D. Krüerke, H.-S. Kitzerow, G. Heppke, and V. Vill, “First Observation of
Selective Reflection and Blue Phases in Chiral Discotic Liquid Crystals,” Berichte
der Bunsengesellschaft für physikalische Chemie, vol. 97, no. 10, pp. 1371–1375,
1993, doi: 10.1002/bbpc.19930971032.'
mla: Krüerke, D., et al. “First Observation of Selective Reflection and Blue Phases
in Chiral Discotic Liquid Crystals.” Berichte Der Bunsengesellschaft Für Physikalische
Chemie, vol. 97, no. 10, Wiley, 1993, pp. 1371–75, doi:10.1002/bbpc.19930971032.
short: D. Krüerke, H.-S. Kitzerow, G. Heppke, V. Vill, Berichte Der Bunsengesellschaft
Für Physikalische Chemie 97 (1993) 1371–1375.
date_created: 2023-01-26T11:10:52Z
date_updated: 2023-01-26T11:49:23Z
department:
- _id: '313'
doi: 10.1002/bbpc.19930971032
extern: '1'
intvolume: ' 97'
issue: '10'
keyword:
- General Chemical Engineering
language:
- iso: eng
page: 1371-1375
publication: Berichte der Bunsengesellschaft für physikalische Chemie
publication_identifier:
issn:
- 0005-9021
publication_status: published
publisher: Wiley
status: public
title: First Observation of Selective Reflection and Blue Phases in Chiral Discotic
Liquid Crystals
type: journal_article
user_id: '254'
volume: 97
year: '1993'
...
---
_id: '43449'
abstract:
- lang: eng
text: We present subpicosecond time-resolved four-wave-mixing studies on GaAs/AlAs
short-period superlattices having different miniband widths. Photon echoes are
observed as a consequence of the inhomogeneous broadening of the excitonic resonance.
In addition, the photon-echo signal exhibits periodic modulations as a function
of the time delay between the excitation laser pulses. Free excitons and excitons
bound to neutral acceptors are identified as the underlying three-level system
leading to the observed photon-echo quantum beats. From the beat period we can
directly infer the dissociation energy of the bound exciton. In accordance with
theory, we find that the dissociation energy decreases with increasing miniband
width, i.e., when the excitons become less confined. In addition, we find that
the dephasing rate of bound excitons is about one order of magnitude less than
that of free excitons and is mainly determined by energy relaxation.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: M.
full_name: Koch, M.
last_name: Koch
- first_name: D.
full_name: Weber, D.
last_name: Weber
- first_name: J.
full_name: Feldmann, J.
last_name: Feldmann
- first_name: E.O.
full_name: Göbel, E.O.
last_name: Göbel
- first_name: A.
full_name: Schulze, A.
last_name: Schulze
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: S.
full_name: Schmitt-Rink, S.
last_name: Schmitt-Rink
- first_name: K.
full_name: Ploog, K.
last_name: Ploog
citation:
ama: Meier T, Koch M, Weber D, et al. Subpicosecond photon-echo spectroscopy on
GaAs/AlAs short-period superlattices. Physical Review B. 1993;47(3):1532-1539.
doi:10.1103/PhysRevB.47.1532
apa: Meier, T., Koch, M., Weber, D., Feldmann, J., Göbel, E. O., Schulze, A., Thomas,
P., Schmitt-Rink, S., & Ploog, K. (1993). Subpicosecond photon-echo spectroscopy
on GaAs/AlAs short-period superlattices. Physical Review B, 47(3),
1532–1539. https://doi.org/10.1103/PhysRevB.47.1532
bibtex: '@article{Meier_Koch_Weber_Feldmann_Göbel_Schulze_Thomas_Schmitt-Rink_Ploog_1993,
title={Subpicosecond photon-echo spectroscopy on GaAs/AlAs short-period superlattices},
volume={47}, DOI={10.1103/PhysRevB.47.1532},
number={3}, journal={Physical Review B}, publisher={American Physical Society},
author={Meier, Torsten and Koch, M. and Weber, D. and Feldmann, J. and Göbel,
E.O. and Schulze, A. and Thomas, P. and Schmitt-Rink, S. and Ploog, K.}, year={1993},
pages={1532–1539} }'
chicago: 'Meier, Torsten, M. Koch, D. Weber, J. Feldmann, E.O. Göbel, A. Schulze,
P. Thomas, S. Schmitt-Rink, and K. Ploog. “Subpicosecond Photon-Echo Spectroscopy
on GaAs/AlAs Short-Period Superlattices.” Physical Review B 47, no. 3 (1993):
1532–39. https://doi.org/10.1103/PhysRevB.47.1532.'
ieee: 'T. Meier et al., “Subpicosecond photon-echo spectroscopy on GaAs/AlAs
short-period superlattices,” Physical Review B, vol. 47, no. 3, pp. 1532–1539,
1993, doi: 10.1103/PhysRevB.47.1532.'
mla: Meier, Torsten, et al. “Subpicosecond Photon-Echo Spectroscopy on GaAs/AlAs
Short-Period Superlattices.” Physical Review B, vol. 47, no. 3, American
Physical Society, 1993, pp. 1532–39, doi:10.1103/PhysRevB.47.1532.
short: T. Meier, M. Koch, D. Weber, J. Feldmann, E.O. Göbel, A. Schulze, P. Thomas,
S. Schmitt-Rink, K. Ploog, Physical Review B 47 (1993) 1532–1539.
date_created: 2023-04-11T05:36:54Z
date_updated: 2023-04-11T05:36:57Z
department:
- _id: '293'
doi: 10.1103/PhysRevB.47.1532
extern: '1'
intvolume: ' 47'
issue: '3'
language:
- iso: eng
main_file_link:
- url: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.47.1532
page: 1532-1539
publication: Physical Review B
publication_status: published
publisher: American Physical Society
status: public
title: Subpicosecond photon-echo spectroscopy on GaAs/AlAs short-period superlattices
type: journal_article
user_id: '49063'
volume: 47
year: '1993'
...
---
_id: '43442'
abstract:
- lang: eng
text: Femtosecond nonlinear laser spectroscopy is applied to study the dynamics
of coherent optical excitations in semiconductors. In particular, beat phenomena
of excitonic excitations in quantum wells and superlattice structures will be
considered. We will demonstrate that four wave mixing experiments with time resolved
detection of the nonlinear signal are able to distinguish between quantum beats
and polarization interference. In addition, we report for a GaAs/AlAs superlattice
the observation of quantum beats in the photon echo signal. The occurence of these
beats is attributed to the simultaneous excitation of bound and localized excitons.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: E.O.
full_name: Göbel, E.O.
last_name: Göbel
- first_name: M.
full_name: Koch, M.
last_name: Koch
- first_name: J.
full_name: Feldmann, J.
last_name: Feldmann
- first_name: G.
full_name: von Plessen, G.
last_name: von Plessen
- first_name: A.
full_name: Schulze, A.
last_name: Schulze
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: S.
full_name: Schmitt-Rink, S.
last_name: Schmitt-Rink
- first_name: K.
full_name: Köhler, K.
last_name: Köhler
- first_name: K.
full_name: Ploog, K.
last_name: Ploog
citation:
ama: 'Meier T, Göbel EO, Koch M, et al. Time resolved Four Wave Mixing in GaAs/AlAs
Quantum Well Structures. In: Lookwood D, Pinczuk A, eds. Optical Phenomena
in Semiconductor Structures of Reduced Dimension. Springer; 1993:145-155.
doi:10.1007/978-94-011-1912-2_14'
apa: Meier, T., Göbel, E. O., Koch, M., Feldmann, J., von Plessen, G., Schulze,
A., Thomas, P., Schmitt-Rink, S., Köhler, K., & Ploog, K. (1993). Time resolved
Four Wave Mixing in GaAs/AlAs Quantum Well Structures. In D. Lookwood & A.
Pinczuk (Eds.), Optical Phenomena in Semiconductor Structures of Reduced Dimension
(pp. 145–155). Springer. https://doi.org/10.1007/978-94-011-1912-2_14
bibtex: '@inbook{Meier_Göbel_Koch_Feldmann_von Plessen_Schulze_Thomas_Schmitt-Rink_Köhler_Ploog_1993,
place={Dordrecht}, title={Time resolved Four Wave Mixing in GaAs/AlAs Quantum
Well Structures}, DOI={10.1007/978-94-011-1912-2_14},
booktitle={Optical Phenomena in Semiconductor Structures of Reduced Dimension},
publisher={Springer}, author={Meier, Torsten and Göbel, E.O. and Koch, M. and
Feldmann, J. and von Plessen, G. and Schulze, A. and Thomas, P. and Schmitt-Rink,
S. and Köhler, K. and Ploog, K.}, editor={Lookwood, D. and Pinczuk, A.}, year={1993},
pages={145–155} }'
chicago: 'Meier, Torsten, E.O. Göbel, M. Koch, J. Feldmann, G. von Plessen, A. Schulze,
P. Thomas, S. Schmitt-Rink, K. Köhler, and K. Ploog. “Time Resolved Four Wave
Mixing in GaAs/AlAs Quantum Well Structures.” In Optical Phenomena in Semiconductor
Structures of Reduced Dimension, edited by D. Lookwood and A. Pinczuk, 145–55.
Dordrecht: Springer, 1993. https://doi.org/10.1007/978-94-011-1912-2_14.'
ieee: 'T. Meier et al., “Time resolved Four Wave Mixing in GaAs/AlAs Quantum
Well Structures,” in Optical Phenomena in Semiconductor Structures of Reduced
Dimension, D. Lookwood and A. Pinczuk, Eds. Dordrecht: Springer, 1993, pp.
145–155.'
mla: Meier, Torsten, et al. “Time Resolved Four Wave Mixing in GaAs/AlAs Quantum
Well Structures.” Optical Phenomena in Semiconductor Structures of Reduced
Dimension, edited by D. Lookwood and A. Pinczuk, Springer, 1993, pp. 145–55,
doi:10.1007/978-94-011-1912-2_14.
short: 'T. Meier, E.O. Göbel, M. Koch, J. Feldmann, G. von Plessen, A. Schulze,
P. Thomas, S. Schmitt-Rink, K. Köhler, K. Ploog, in: D. Lookwood, A. Pinczuk (Eds.),
Optical Phenomena in Semiconductor Structures of Reduced Dimension, Springer,
Dordrecht, 1993, pp. 145–155.'
date_created: 2023-04-11T05:17:00Z
date_updated: 2023-04-11T05:17:02Z
department:
- _id: '293'
doi: 10.1007/978-94-011-1912-2_14
editor:
- first_name: D.
full_name: Lookwood, D.
last_name: Lookwood
- first_name: A.
full_name: Pinczuk, A.
last_name: Pinczuk
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://link.springer.com/chapter/10.1007/978-94-011-1912-2_14
page: 145-155
place: Dordrecht
publication: Optical Phenomena in Semiconductor Structures of Reduced Dimension
publication_identifier:
isbn:
- 978-94-010-4845-3
publication_status: published
publisher: Springer
status: public
title: Time resolved Four Wave Mixing in GaAs/AlAs Quantum Well Structures
type: book_chapter
user_id: '49063'
year: '1993'
...
---
_id: '44286'
abstract:
- lang: eng
text: In degenerate four-wave-mixing (DFWM) experiments the polarization of the
incident laser pulses can have a strong influence on the measured signal. For
GaAs quantum wells a number of DFWM experiments were performed by using either
parallel or perpendicular polarization of the incident laser pulses. Experimentally,
it turned out that some characteristic features of the signal differ appreciably
for the two configurations. In particular, different dephasing times, phase shifts
of the quantum beats, different time-resolved behavior (echoes versus free-induction
decay), and intensity dependence of the measured signal have been reported
article_number: QMG1
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: D.
full_name: Bennhardt, D.
last_name: Bennhardt
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: R.
full_name: Eccleston, R.
last_name: Eccleston
- first_name: E.
full_name: Mayer, E.
last_name: Mayer
- first_name: J.
full_name: Kuhl, J.
last_name: Kuhl
citation:
ama: 'Meier T, Bennhardt D, Thomas P, Eccleston R, Mayer E, Kuhl J. Theory for polarization-dependent
four-wave-mixing signals in quantum wells. In: Quantum Electronics and Laser
Science Conference. ; 1993.'
apa: Meier, T., Bennhardt, D., Thomas, P., Eccleston, R., Mayer, E., & Kuhl,
J. (1993). Theory for polarization-dependent four-wave-mixing signals in quantum
wells. Quantum Electronics and Laser Science Conference, Article QMG1.
Quantum Electronics and Laser Science Conference 1993, Baltimore, Maryland United
States.
bibtex: '@inproceedings{Meier_Bennhardt_Thomas_Eccleston_Mayer_Kuhl_1993, title={Theory
for polarization-dependent four-wave-mixing signals in quantum wells}, number={QMG1},
booktitle={Quantum Electronics and Laser Science Conference}, author={Meier, Torsten
and Bennhardt, D. and Thomas, P. and Eccleston, R. and Mayer, E. and Kuhl, J.},
year={1993} }'
chicago: Meier, Torsten, D. Bennhardt, P. Thomas, R. Eccleston, E. Mayer, and J.
Kuhl. “Theory for Polarization-Dependent Four-Wave-Mixing Signals in Quantum Wells.”
In Quantum Electronics and Laser Science Conference, 1993.
ieee: T. Meier, D. Bennhardt, P. Thomas, R. Eccleston, E. Mayer, and J. Kuhl, “Theory
for polarization-dependent four-wave-mixing signals in quantum wells,” presented
at the Quantum Electronics and Laser Science Conference 1993, Baltimore, Maryland
United States, 1993.
mla: Meier, Torsten, et al. “Theory for Polarization-Dependent Four-Wave-Mixing
Signals in Quantum Wells.” Quantum Electronics and Laser Science Conference,
QMG1, 1993.
short: 'T. Meier, D. Bennhardt, P. Thomas, R. Eccleston, E. Mayer, J. Kuhl, in:
Quantum Electronics and Laser Science Conference, 1993.'
conference:
end_date: 1993-05-07
location: Baltimore, Maryland United States
name: Quantum Electronics and Laser Science Conference 1993
start_date: 1993-05-02
date_created: 2023-05-01T11:49:56Z
date_updated: 2023-05-01T11:49:59Z
department:
- _id: '293'
extern: '1'
language:
- iso: eng
main_file_link:
- url: https://opg.optica.org/abstract.cfm?uri=qels-1993-QMG1
publication: Quantum Electronics and Laser Science Conference
publication_identifier:
isbn:
- 1-55752-302-9
publication_status: published
status: public
title: Theory for polarization-dependent four-wave-mixing signals in quantum wells
type: conference
user_id: '49063'
year: '1993'
...
---
_id: '21787'
author:
- first_name: Gitta
full_name: Domik, Gitta
id: '90'
last_name: Domik
- first_name: Kristina D.
full_name: Mickus-Miceli, Kristina D.
last_name: Mickus-Miceli
citation:
ama: Domik G, Mickus-Miceli KD. Design and development of data visualization systems
in a workstation environment. Journal of Microcomputer Applications. 1992;15(2):81-88.
doi:10.1016/0745-7138(92)90051-6
apa: Domik, G., & Mickus-Miceli, K. D. (1992). Design and development of data
visualization systems in a workstation environment. Journal of Microcomputer
Applications, 15(2), 81–88. https://doi.org/10.1016/0745-7138(92)90051-6
bibtex: '@article{Domik_Mickus-Miceli_1992, title={Design and development of data
visualization systems in a workstation environment}, volume={15}, DOI={10.1016/0745-7138(92)90051-6},
number={2}, journal={Journal of Microcomputer Applications}, author={Domik, Gitta
and Mickus-Miceli, Kristina D.}, year={1992}, pages={81–88} }'
chicago: 'Domik, Gitta, and Kristina D. Mickus-Miceli. “Design and Development of
Data Visualization Systems in a Workstation Environment.” Journal of Microcomputer
Applications 15, no. 2 (1992): 81–88. https://doi.org/10.1016/0745-7138(92)90051-6.'
ieee: G. Domik and K. D. Mickus-Miceli, “Design and development of data visualization
systems in a workstation environment,” Journal of Microcomputer Applications,
vol. 15, no. 2, pp. 81–88, 1992.
mla: Domik, Gitta, and Kristina D. Mickus-Miceli. “Design and Development of Data
Visualization Systems in a Workstation Environment.” Journal of Microcomputer
Applications, vol. 15, no. 2, 1992, pp. 81–88, doi:10.1016/0745-7138(92)90051-6.
short: G. Domik, K.D. Mickus-Miceli, Journal of Microcomputer Applications 15 (1992)
81–88.
date_created: 2021-04-25T17:44:33Z
date_updated: 2022-01-06T06:55:13Z
department:
- _id: '65'
doi: 10.1016/0745-7138(92)90051-6
intvolume: ' 15'
issue: '2'
language:
- iso: eng
page: 81-88
publication: Journal of Microcomputer Applications
publication_identifier:
issn:
- 0745-7138
status: public
title: Design and development of data visualization systems in a workstation environment
type: journal_article
user_id: '14955'
volume: 15
year: '1992'
...
---
_id: '11782'
abstract:
- lang: eng
text: 'The problem of trellis coding for multilevel baseband transmission over partial
response channels with transfer polynomials of the form (1+or-D/sup N/) is addressed.
The novel method presented here accounts for the channel memory by using multidimensional
signal sets and partitioning the signal set present at the noiseless channel output.
It is shown that this coding technique can be viewed as a generalization of a
well-known procedure for binary signaling: the concatenation of convolutional
codes and inner block codes that are tuned to the channel polynomial. It results
in high coding gains with moderate complexity if some bandwidth expansion is accepted.'
author:
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Haeb-Umbach R. A modified trellis coding technique for partial response channels.
IEEE Transactions on Communications. 1992.
apa: Haeb-Umbach, R. (1992). A modified trellis coding technique for partial response
channels. IEEE Transactions on Communications.
bibtex: '@article{Haeb-Umbach_1992, title={A modified trellis coding technique for
partial response channels}, journal={IEEE Transactions on Communications}, author={Haeb-Umbach,
Reinhold}, year={1992} }'
chicago: Haeb-Umbach, Reinhold. “A Modified Trellis Coding Technique for Partial
Response Channels.” IEEE Transactions on Communications, 1992.
ieee: R. Haeb-Umbach, “A modified trellis coding technique for partial response
channels,” IEEE Transactions on Communications, 1992.
mla: Haeb-Umbach, Reinhold. “A Modified Trellis Coding Technique for Partial Response
Channels.” IEEE Transactions on Communications, 1992.
short: R. Haeb-Umbach, IEEE Transactions on Communications (1992).
date_created: 2019-07-12T05:28:09Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
language:
- iso: eng
publication: IEEE Transactions on Communications
status: public
title: A modified trellis coding technique for partial response channels
type: journal_article
user_id: '44006'
year: '1992'
...