---
_id: '15846'
author:
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Ian
full_name: Galbraith, Ian
last_name: Galbraith
- first_name: Arvydas
full_name: Ruseckas, Arvydas
last_name: Ruseckas
- first_name: Graham A.
full_name: Turnbull, Graham A.
last_name: Turnbull
- first_name: Ifor D. W.
full_name: Samuel, Ifor D. W.
last_name: Samuel
citation:
ama: 'Schumacher S, Galbraith I, Ruseckas A, Turnbull GA, Samuel IDW. Dynamics of
photoexcitation and stimulated optical emission in conjugated polymers: A multiscale
quantum-chemistry and Maxwell-Bloch-equations approach. Physical Review B.
Published online 2010. doi:10.1103/physrevb.81.245407'
apa: 'Schumacher, S., Galbraith, I., Ruseckas, A., Turnbull, G. A., & Samuel,
I. D. W. (2010). Dynamics of photoexcitation and stimulated optical emission in
conjugated polymers: A multiscale quantum-chemistry and Maxwell-Bloch-equations
approach. Physical Review B. https://doi.org/10.1103/physrevb.81.245407'
bibtex: '@article{Schumacher_Galbraith_Ruseckas_Turnbull_Samuel_2010, title={Dynamics
of photoexcitation and stimulated optical emission in conjugated polymers: A multiscale
quantum-chemistry and Maxwell-Bloch-equations approach}, DOI={10.1103/physrevb.81.245407},
journal={Physical Review B}, author={Schumacher, Stefan and Galbraith, Ian and
Ruseckas, Arvydas and Turnbull, Graham A. and Samuel, Ifor D. W.}, year={2010}
}'
chicago: 'Schumacher, Stefan, Ian Galbraith, Arvydas Ruseckas, Graham A. Turnbull,
and Ifor D. W. Samuel. “Dynamics of Photoexcitation and Stimulated Optical Emission
in Conjugated Polymers: A Multiscale Quantum-Chemistry and Maxwell-Bloch-Equations
Approach.” Physical Review B, 2010. https://doi.org/10.1103/physrevb.81.245407.'
ieee: 'S. Schumacher, I. Galbraith, A. Ruseckas, G. A. Turnbull, and I. D. W. Samuel,
“Dynamics of photoexcitation and stimulated optical emission in conjugated polymers:
A multiscale quantum-chemistry and Maxwell-Bloch-equations approach,” Physical
Review B, 2010, doi: 10.1103/physrevb.81.245407.'
mla: 'Schumacher, Stefan, et al. “Dynamics of Photoexcitation and Stimulated Optical
Emission in Conjugated Polymers: A Multiscale Quantum-Chemistry and Maxwell-Bloch-Equations
Approach.” Physical Review B, 2010, doi:10.1103/physrevb.81.245407.'
short: S. Schumacher, I. Galbraith, A. Ruseckas, G.A. Turnbull, I.D.W. Samuel, Physical
Review B (2010).
date_created: 2020-02-10T11:19:35Z
date_updated: 2025-12-16T08:02:49Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '27'
doi: 10.1103/physrevb.81.245407
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Physical Review B
publication_identifier:
issn:
- 1098-0121
- 1550-235X
publication_status: published
status: public
title: 'Dynamics of photoexcitation and stimulated optical emission in conjugated
polymers: A multiscale quantum-chemistry and Maxwell-Bloch-equations approach'
type: journal_article
user_id: '16199'
year: '2010'
...
---
_id: '18562'
abstract:
- lang: eng
text: "The structural and electronic properties of strained silicon are investigated
quantitatively with ab initio computational methods. For this purpose we combine
densityfunctional theory within the local‐density approximation and the GW approximation
for the electronic self‐energy. From the variation of the total energy as a function
of applied strain we obtain the elastic constants, Poisson ratios and related
structural parameters, taking a possible internal relaxation fully into account.
For biaxial tensile strain in the (001) and (111) planes we then investigate the
effects on the electronic band structure. These strain configurations occur in
epitaxial silicon films grown on SiGe templates along different crystallographic
directions.\r\nThe tetragonal deformation resulting from (001) strain induces
a valley splitting that removes the sixfold degeneracy of the conduction‐band
minimum. Furthermore, strain in any direction causes the band structure to warp.
We present quantitative results for the electron effective mass, derived from
the curvature of the conduction band, as a function of strain and discuss the
implications for the mobility of the charge carriers. The inclusion of proper
self‐energy corrections within the GW approximation in our work not only yields
band gaps in much better agreement with experimental measurements than the localdensity
approximation, but also predicts slightly larger electron effective masses."
article_type: original
author:
- first_name: Mohammed
full_name: Bouhassoune, Mohammed
last_name: Bouhassoune
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
citation:
ama: Bouhassoune M, Schindlmayr A. Electronic structure and effective masses in
strained silicon. Physica Status Solidi C. 2010;7(2):460-463. doi:10.1002/pssc.200982470
apa: Bouhassoune, M., & Schindlmayr, A. (2010). Electronic structure and effective
masses in strained silicon. Physica Status Solidi C, 7(2), 460–463.
https://doi.org/10.1002/pssc.200982470
bibtex: '@article{Bouhassoune_Schindlmayr_2010, title={Electronic structure and
effective masses in strained silicon}, volume={7}, DOI={10.1002/pssc.200982470},
number={2}, journal={Physica Status Solidi C}, publisher={Wiley-VCH}, author={Bouhassoune,
Mohammed and Schindlmayr, Arno}, year={2010}, pages={460–463} }'
chicago: 'Bouhassoune, Mohammed, and Arno Schindlmayr. “Electronic Structure and
Effective Masses in Strained Silicon.” Physica Status Solidi C 7, no. 2
(2010): 460–63. https://doi.org/10.1002/pssc.200982470.'
ieee: 'M. Bouhassoune and A. Schindlmayr, “Electronic structure and effective masses
in strained silicon,” Physica Status Solidi C, vol. 7, no. 2, pp. 460–463,
2010, doi: 10.1002/pssc.200982470.'
mla: Bouhassoune, Mohammed, and Arno Schindlmayr. “Electronic Structure and Effective
Masses in Strained Silicon.” Physica Status Solidi C, vol. 7, no. 2, Wiley-VCH,
2010, pp. 460–63, doi:10.1002/pssc.200982470.
short: M. Bouhassoune, A. Schindlmayr, Physica Status Solidi C 7 (2010) 460–463.
conference:
end_date: 2009-07-10
location: Weimar
name: 12th International Conference on the Formation of Semiconductor Interfaces
start_date: 2009-07-05
date_created: 2020-08-28T11:35:38Z
date_updated: 2025-12-16T08:10:05Z
ddc:
- '530'
department:
- _id: '296'
- _id: '35'
- _id: '15'
- _id: '170'
- _id: '230'
doi: 10.1002/pssc.200982470
external_id:
isi:
- '000284313000081'
file:
- access_level: closed
content_type: application/pdf
creator: schindlm
date_created: 2020-08-28T14:38:30Z
date_updated: 2020-08-30T15:13:32Z
description: © 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
file_id: '18582'
file_name: pssc.200982470.pdf
file_size: 118792
relation: main_file
title: Electronic structure and effective masses in strained silicon
file_date_updated: 2020-08-30T15:13:32Z
has_accepted_license: '1'
intvolume: ' 7'
isi: '1'
issue: '2'
language:
- iso: eng
page: 460-463
publication: Physica Status Solidi C
publication_identifier:
eissn:
- 1610-1642
issn:
- 1862-6351
publication_status: published
publisher: Wiley-VCH
quality_controlled: '1'
status: public
title: Electronic structure and effective masses in strained silicon
type: journal_article
user_id: '16199'
volume: 7
year: '2010'
...
---
_id: '18549'
abstract:
- lang: eng
text: We describe the software package SPEX, which allows first-principles calculations
of quasiparticle and collective electronic excitations in solids using techniques
from many-body perturbation theory. The implementation is based on the full-potential
linearized augmented-plane-wave (FLAPW) method, which treats core and valence
electrons on an equal footing and can be applied to a wide range of materials,
including transition metals and rare earths. After a discussion of essential features
that contribute to the high numerical efficiency of the code, we present illustrative
results for quasiparticle band structures calculated within the GW approximation
for the electronic self-energy, electron-energy-loss spectra with inter- and intraband
transitions as well as local-field effects, and spin-wave spectra of itinerant
ferromagnets. In all cases the inclusion of many-body correlation terms leads
to very good quantitative agreement with experimental spectroscopies.
author:
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
- first_name: Christoph
full_name: Friedrich, Christoph
last_name: Friedrich
- first_name: Ersoy
full_name: Şaşıoğlu, Ersoy
last_name: Şaşıoğlu
- first_name: Stefan
full_name: Blügel, Stefan
last_name: Blügel
citation:
ama: 'Schindlmayr A, Friedrich C, Şaşıoğlu E, Blügel S. First-principles calculation
of electronic excitations in solids with SPEX. In: Dolg FM, ed. Modern and
Universal First-Principles Methods for Many-Electron Systems in Chemistry and
Physics. Vol 3. Progress in Physical Chemistry. Oldenbourg; 2010:67-78. doi:10.1524/9783486711639.67'
apa: Schindlmayr, A., Friedrich, C., Şaşıoğlu, E., & Blügel, S. (2010). First-principles
calculation of electronic excitations in solids with SPEX. In F. M. Dolg (Ed.),
Modern and Universal First-Principles Methods for Many-Electron Systems in
Chemistry and Physics (Vol. 3, pp. 67–78). Oldenbourg. https://doi.org/10.1524/9783486711639.67
bibtex: '@inbook{Schindlmayr_Friedrich_Şaşıoğlu_Blügel_2010, place={München}, series={Progress
in Physical Chemistry}, title={First-principles calculation of electronic excitations
in solids with SPEX}, volume={3}, DOI={10.1524/9783486711639.67},
booktitle={Modern and Universal First-Principles Methods for Many-Electron Systems
in Chemistry and Physics}, publisher={Oldenbourg}, author={Schindlmayr, Arno and
Friedrich, Christoph and Şaşıoğlu, Ersoy and Blügel, Stefan}, editor={Dolg, Franz
Michael}, year={2010}, pages={67–78}, collection={Progress in Physical Chemistry}
}'
chicago: 'Schindlmayr, Arno, Christoph Friedrich, Ersoy Şaşıoğlu, and Stefan Blügel.
“First-Principles Calculation of Electronic Excitations in Solids with SPEX.”
In Modern and Universal First-Principles Methods for Many-Electron Systems
in Chemistry and Physics, edited by Franz Michael Dolg, 3:67–78. Progress
in Physical Chemistry. München: Oldenbourg, 2010. https://doi.org/10.1524/9783486711639.67.'
ieee: 'A. Schindlmayr, C. Friedrich, E. Şaşıoğlu, and S. Blügel, “First-principles
calculation of electronic excitations in solids with SPEX,” in Modern and Universal
First-Principles Methods for Many-Electron Systems in Chemistry and Physics,
vol. 3, F. M. Dolg, Ed. München: Oldenbourg, 2010, pp. 67–78.'
mla: Schindlmayr, Arno, et al. “First-Principles Calculation of Electronic Excitations
in Solids with SPEX.” Modern and Universal First-Principles Methods for Many-Electron
Systems in Chemistry and Physics, edited by Franz Michael Dolg, vol. 3, Oldenbourg,
2010, pp. 67–78, doi:10.1524/9783486711639.67.
short: 'A. Schindlmayr, C. Friedrich, E. Şaşıoğlu, S. Blügel, in: F.M. Dolg (Ed.),
Modern and Universal First-Principles Methods for Many-Electron Systems in Chemistry
and Physics, Oldenbourg, München, 2010, pp. 67–78.'
date_created: 2020-08-28T11:03:04Z
date_updated: 2025-12-16T08:09:01Z
department:
- _id: '296'
- _id: '35'
- _id: '15'
- _id: '170'
- _id: '230'
doi: 10.1524/9783486711639.67
editor:
- first_name: Franz Michael
full_name: Dolg, Franz Michael
last_name: Dolg
intvolume: ' 3'
language:
- iso: eng
page: 67-78
place: München
publication: Modern and Universal First-Principles Methods for Many-Electron Systems
in Chemistry and Physics
publication_identifier:
eisbn:
- 978-3-486-71163-9
isbn:
- 978-3-486-59827-8
publication_status: published
publisher: Oldenbourg
quality_controlled: '1'
series_title: Progress in Physical Chemistry
status: public
title: First-principles calculation of electronic excitations in solids with SPEX
type: book_chapter
user_id: '16199'
volume: 3
year: '2010'
...
---
_id: '18560'
abstract:
- lang: eng
text: We present a computational scheme to study spin excitations in magnetic materials
from first principles. The central quantity is the transverse spin susceptibility,
from which the complete excitation spectrum, including single-particle spin-flip
Stoner excitations and collective spin-wave modes, can be obtained. The susceptibility
is derived from many-body perturbation theory and includes dynamic correlation
through a summation over ladder diagrams that describe the coupling of electrons
and holes with opposite spins. In contrast to earlier studies, we do not use a
model potential with adjustable parameters for the electron-hole interaction but
employ the random-phase approximation. To reduce the numerical cost for the calculation
of the four-point scattering matrix we perform a projection onto maximally localized
Wannier functions, which allows us to truncate the matrix efficiently by exploiting
the short spatial range of electronic correlation in the partially filled d or
f orbitals. Our implementation is based on the full-potential linearized augmented-plane-wave
method. Starting from a ground-state calculation within the local-spin-density
approximation (LSDA), we first analyze the matrix elements of the screened Coulomb
potential in the Wannier basis for the 3d transition-metal series. In particular,
we discuss the differences between a constrained nonmagnetic and a proper spin-polarized
treatment for the ferromagnets Fe, Co, and Ni. The spectrum of single-particle
and collective spin excitations in fcc Ni is then studied in detail. The calculated
spin-wave dispersion is in good overall agreement with experimental data and contains
both an acoustic and an optical branch for intermediate wave vectors along the
[100] direction. In addition, we find evidence for a similar double-peak structure
in the spectral function along the [111] direction. To investigate the influence
of static correlation we finally consider LSDA+U as an alternative starting point
and show that, together with an improved description of the Fermi surface, it
yields a more accurate quantitative value for the spin-wave stiffness constant,
which is overestimated in the LSDA.
article_number: '054434'
article_type: original
author:
- first_name: Ersoy
full_name: Şaşıoğlu, Ersoy
last_name: Şaşıoğlu
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
- first_name: Christoph
full_name: Friedrich, Christoph
last_name: Friedrich
- first_name: Frank
full_name: Freimuth, Frank
last_name: Freimuth
- first_name: Stefan
full_name: Blügel, Stefan
last_name: Blügel
citation:
ama: Şaşıoğlu E, Schindlmayr A, Friedrich C, Freimuth F, Blügel S. Wannier-function
approach to spin excitations in solids. Physical Review B. 2010;81(5).
doi:10.1103/PhysRevB.81.054434
apa: Şaşıoğlu, E., Schindlmayr, A., Friedrich, C., Freimuth, F., & Blügel, S.
(2010). Wannier-function approach to spin excitations in solids. Physical Review
B, 81(5), Article 054434. https://doi.org/10.1103/PhysRevB.81.054434
bibtex: '@article{Şaşıoğlu_Schindlmayr_Friedrich_Freimuth_Blügel_2010, title={Wannier-function
approach to spin excitations in solids}, volume={81}, DOI={10.1103/PhysRevB.81.054434},
number={5054434}, journal={Physical Review B}, publisher={American Physical Society},
author={Şaşıoğlu, Ersoy and Schindlmayr, Arno and Friedrich, Christoph and Freimuth,
Frank and Blügel, Stefan}, year={2010} }'
chicago: Şaşıoğlu, Ersoy, Arno Schindlmayr, Christoph Friedrich, Frank Freimuth,
and Stefan Blügel. “Wannier-Function Approach to Spin Excitations in Solids.”
Physical Review B 81, no. 5 (2010). https://doi.org/10.1103/PhysRevB.81.054434.
ieee: 'E. Şaşıoğlu, A. Schindlmayr, C. Friedrich, F. Freimuth, and S. Blügel, “Wannier-function
approach to spin excitations in solids,” Physical Review B, vol. 81, no.
5, Art. no. 054434, 2010, doi: 10.1103/PhysRevB.81.054434.'
mla: Şaşıoğlu, Ersoy, et al. “Wannier-Function Approach to Spin Excitations in Solids.”
Physical Review B, vol. 81, no. 5, 054434, American Physical Society, 2010,
doi:10.1103/PhysRevB.81.054434.
short: E. Şaşıoğlu, A. Schindlmayr, C. Friedrich, F. Freimuth, S. Blügel, Physical
Review B 81 (2010).
date_created: 2020-08-28T11:31:26Z
date_updated: 2025-12-16T11:09:51Z
ddc:
- '530'
department:
- _id: '296'
- _id: '35'
- _id: '15'
- _id: '170'
- _id: '230'
doi: 10.1103/PhysRevB.81.054434
external_id:
arxiv:
- '1002.4897'
isi:
- '000274998000084'
file:
- access_level: open_access
content_type: application/pdf
creator: schindlm
date_created: 2020-08-28T11:33:17Z
date_updated: 2020-08-30T15:06:10Z
description: © 2010 American Physical Society
file_id: '18561'
file_name: PhysRevB.81.054434.pdf
file_size: 711970
relation: main_file
title: Wannier-function approach to spin excitations in solids
file_date_updated: 2020-08-30T15:06:10Z
has_accepted_license: '1'
intvolume: ' 81'
isi: '1'
issue: '5'
language:
- iso: eng
oa: '1'
publication: Physical Review B
publication_identifier:
eissn:
- 1550-235X
issn:
- 1098-0121
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Wannier-function approach to spin excitations in solids
type: journal_article
user_id: '16199'
volume: 81
year: '2010'
...
---
_id: '18557'
abstract:
- lang: eng
text: We describe the software package SPEX, which allows first-principles calculations
of quasiparticle and collective electronic excitations in solids using techniques
from many-body perturbation theory. The implementation is based on the full-potential
linearized augmented-plane-wave (FLAPW) method, which treats core and valence
electrons on an equal footing and can be applied to a wide range of materials,
including transition metals and rare earths. After a discussion of essential features
that contribute to the high numerical efficiency of the code, we present illustrative
results for quasiparticle band structures calculated within the GW approximation
for the electronic self-energy, electron-energy-loss spectra with inter- and intraband
transitions as well as local-field effects, and spin-wave spectra of itinerant
ferromagnets. In all cases the inclusion of many-body correlation terms leads
to very good quantitative agreement with experimental spectroscopies.
article_type: original
author:
- first_name: Arno
full_name: Schindlmayr, Arno
id: '458'
last_name: Schindlmayr
orcid: 0000-0002-4855-071X
- first_name: Christoph
full_name: Friedrich, Christoph
last_name: Friedrich
- first_name: Ersoy
full_name: Şaşıoğlu, Ersoy
last_name: Şaşıoğlu
- first_name: Stefan
full_name: Blügel, Stefan
last_name: Blügel
citation:
ama: Schindlmayr A, Friedrich C, Şaşıoğlu E, Blügel S. First-principles calculation
of electronic excitations in solids with SPEX. Zeitschrift für Physikalische
Chemie. 2010;224(3-4):357-368. doi:10.1524/zpch.2010.6110
apa: Schindlmayr, A., Friedrich, C., Şaşıoğlu, E., & Blügel, S. (2010). First-principles
calculation of electronic excitations in solids with SPEX. Zeitschrift Für
Physikalische Chemie, 224(3–4), 357–368. https://doi.org/10.1524/zpch.2010.6110
bibtex: '@article{Schindlmayr_Friedrich_Şaşıoğlu_Blügel_2010, title={First-principles
calculation of electronic excitations in solids with SPEX}, volume={224}, DOI={10.1524/zpch.2010.6110}, number={3–4},
journal={Zeitschrift für Physikalische Chemie}, publisher={Oldenbourg}, author={Schindlmayr,
Arno and Friedrich, Christoph and Şaşıoğlu, Ersoy and Blügel, Stefan}, year={2010},
pages={357–368} }'
chicago: 'Schindlmayr, Arno, Christoph Friedrich, Ersoy Şaşıoğlu, and Stefan Blügel.
“First-Principles Calculation of Electronic Excitations in Solids with SPEX.”
Zeitschrift Für Physikalische Chemie 224, no. 3–4 (2010): 357–68. https://doi.org/10.1524/zpch.2010.6110.'
ieee: 'A. Schindlmayr, C. Friedrich, E. Şaşıoğlu, and S. Blügel, “First-principles
calculation of electronic excitations in solids with SPEX,” Zeitschrift für
Physikalische Chemie, vol. 224, no. 3–4, pp. 357–368, 2010, doi: 10.1524/zpch.2010.6110.'
mla: Schindlmayr, Arno, et al. “First-Principles Calculation of Electronic Excitations
in Solids with SPEX.” Zeitschrift Für Physikalische Chemie, vol. 224, no.
3–4, Oldenbourg, 2010, pp. 357–68, doi:10.1524/zpch.2010.6110.
short: A. Schindlmayr, C. Friedrich, E. Şaşıoğlu, S. Blügel, Zeitschrift Für Physikalische
Chemie 224 (2010) 357–368.
date_created: 2020-08-28T11:20:50Z
date_updated: 2025-12-16T11:09:01Z
ddc:
- '530'
department:
- _id: '296'
- _id: '35'
- _id: '15'
- _id: '170'
- _id: '230'
doi: 10.1524/zpch.2010.6110
external_id:
arxiv:
- '1110.1596'
isi:
- '000281124800006'
file:
- access_level: closed
content_type: application/pdf
creator: schindlm
date_created: 2020-08-28T14:34:10Z
date_updated: 2020-08-30T15:04:39Z
description: © 2010 Oldenbourg Wissenschaftsverlag, München
file_id: '18581'
file_name: zpch.2010.6110.pdf
file_size: 912086
relation: main_file
title: First-principles calculation of electronic excitations in solids with SPEX
file_date_updated: 2020-08-30T15:04:39Z
has_accepted_license: '1'
intvolume: ' 224'
isi: '1'
issue: 3-4
language:
- iso: eng
page: 357-368
publication: Zeitschrift für Physikalische Chemie
publication_identifier:
eissn:
- 2196-7156
issn:
- 0942-9352
publication_status: published
publisher: Oldenbourg
quality_controlled: '1'
status: public
title: First-principles calculation of electronic excitations in solids with SPEX
type: journal_article
user_id: '16199'
volume: 224
year: '2010'
...
---
_id: '4177'
abstract:
- lang: eng
text: "Excitonic spectra of weakly disordered semiconductor heterostructures are
simulated on the basis of a\r\none-dimensional tight-binding model. The influence
of the length scale of weak disorder in quantum wells on\r\nthe redshift of the
excitonic peak and its linewidth is studied. By calculating two-dimensional Fouriertransform\r\nspectra
we are able to determine the contribution of disorder to inhomogeneous and also
to homogeneous\r\nbroadenings separately. This disorder-induced dephasing is related
to a Fano-type coupling and leads\r\nto contributions to the homogeneous linewidth
that depends on energy within the inhomogeneously broadened\r\nline. The model
includes heavy- and light-hole excitons and yields smaller inhomogeneous broadening
for the\r\nlight-hole exciton if compared to the heavy-hole exciton, which agrees
qualitatively with the experiment."
article_number: '075307'
article_type: original
author:
- first_name: I.
full_name: Kuznetsova, I.
last_name: Kuznetsova
- first_name: N.
full_name: Gőgh, N.
last_name: Gőgh
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: S. T.
full_name: Cundiff, S. T.
last_name: Cundiff
- first_name: I.
full_name: Varga, I.
last_name: Varga
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
citation:
ama: Kuznetsova I, Gőgh N, Förstner J, et al. Modeling excitonic line shapes in
weakly disordered semiconductor nanostructures. Physical Review B. 2010;81(7).
doi:10.1103/physrevb.81.075307
apa: Kuznetsova, I., Gőgh, N., Förstner, J., Meier, T., Cundiff, S. T., Varga, I.,
& Thomas, P. (2010). Modeling excitonic line shapes in weakly disordered semiconductor
nanostructures. Physical Review B, 81(7), Article 075307. https://doi.org/10.1103/physrevb.81.075307
bibtex: '@article{Kuznetsova_Gőgh_Förstner_Meier_Cundiff_Varga_Thomas_2010, title={Modeling
excitonic line shapes in weakly disordered semiconductor nanostructures}, volume={81},
DOI={10.1103/physrevb.81.075307},
number={7075307}, journal={Physical Review B}, publisher={American Physical Society
(APS)}, author={Kuznetsova, I. and Gőgh, N. and Förstner, Jens and Meier, Torsten
and Cundiff, S. T. and Varga, I. and Thomas, P.}, year={2010} }'
chicago: Kuznetsova, I., N. Gőgh, Jens Förstner, Torsten Meier, S. T. Cundiff, I.
Varga, and P. Thomas. “Modeling Excitonic Line Shapes in Weakly Disordered Semiconductor
Nanostructures.” Physical Review B 81, no. 7 (2010). https://doi.org/10.1103/physrevb.81.075307.
ieee: 'I. Kuznetsova et al., “Modeling excitonic line shapes in weakly disordered
semiconductor nanostructures,” Physical Review B, vol. 81, no. 7, Art.
no. 075307, 2010, doi: 10.1103/physrevb.81.075307.'
mla: Kuznetsova, I., et al. “Modeling Excitonic Line Shapes in Weakly Disordered
Semiconductor Nanostructures.” Physical Review B, vol. 81, no. 7, 075307,
American Physical Society (APS), 2010, doi:10.1103/physrevb.81.075307.
short: I. Kuznetsova, N. Gőgh, J. Förstner, T. Meier, S.T. Cundiff, I. Varga, P.
Thomas, Physical Review B 81 (2010).
date_created: 2018-08-28T09:09:37Z
date_updated: 2025-12-16T11:24:45Z
ddc:
- '530'
department:
- _id: '15'
- _id: '293'
- _id: '170'
- _id: '230'
- _id: '35'
- _id: '34'
- _id: '61'
doi: 10.1103/physrevb.81.075307
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-28T09:13:01Z
date_updated: 2018-08-28T09:13:01Z
file_id: '4178'
file_name: 2010 Kuznetsova,Gögh,Förstner,Meier T,Cundiff, Varga,Thomas_Modeling
excitonic line shapes in weakly disordered semiconductor nanostructures.pdf
file_size: 713758
relation: main_file
success: 1
file_date_updated: 2018-08-28T09:13:01Z
has_accepted_license: '1'
intvolume: ' 81'
issue: '7'
keyword:
- tet_topic_qw
language:
- iso: eng
publication: Physical Review B
publication_identifier:
issn:
- 1098-0121
- 1550-235X
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Modeling excitonic line shapes in weakly disordered semiconductor nanostructures
type: journal_article
user_id: '16199'
volume: 81
year: '2010'
...
---
_id: '4125'
abstract:
- lang: eng
text: We numerically investigate the behavior of Whispering Gallery Modes (WGMs)
in circularly shaped resonators like microdisks, with diameters in the range of
optical vacuum wavelengths. The microdisk is embedded in an uniaxial anisotropic
dielectric environment. By changing the optical anisotropy, one obtains spectral
tunability of the optical modes. The degree of tunability strongly depends on
the radial (azimuthal) mode order M (N). As the modes approach each other spectrally,
anticrossing is observed, leading to a rearrangement of the optical states.
article_type: original
author:
- first_name: S.
full_name: Declair, S.
last_name: Declair
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Declair S, Meier C, Meier T, Förstner J. Anticrossing of Whispering Gallery
Modes in microdisk resonators embedded in an anisotropic environment. Photonics
and Nanostructures - Fundamentals and Applications. 2010;8(4):273-277. doi:10.1016/j.photonics.2010.03.002
apa: Declair, S., Meier, C., Meier, T., & Förstner, J. (2010). Anticrossing
of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic
environment. Photonics and Nanostructures - Fundamentals and Applications,
8(4), 273–277. https://doi.org/10.1016/j.photonics.2010.03.002
bibtex: '@article{Declair_Meier_Meier_Förstner_2010, title={Anticrossing of Whispering
Gallery Modes in microdisk resonators embedded in an anisotropic environment},
volume={8}, DOI={10.1016/j.photonics.2010.03.002},
number={4}, journal={Photonics and Nanostructures - Fundamentals and Applications},
publisher={Elsevier BV}, author={Declair, S. and Meier, Cedrik and Meier, Torsten
and Förstner, Jens}, year={2010}, pages={273–277} }'
chicago: 'Declair, S., Cedrik Meier, Torsten Meier, and Jens Förstner. “Anticrossing
of Whispering Gallery Modes in Microdisk Resonators Embedded in an Anisotropic
Environment.” Photonics and Nanostructures - Fundamentals and Applications
8, no. 4 (2010): 273–77. https://doi.org/10.1016/j.photonics.2010.03.002.'
ieee: 'S. Declair, C. Meier, T. Meier, and J. Förstner, “Anticrossing of Whispering
Gallery Modes in microdisk resonators embedded in an anisotropic environment,”
Photonics and Nanostructures - Fundamentals and Applications, vol. 8, no.
4, pp. 273–277, 2010, doi: 10.1016/j.photonics.2010.03.002.'
mla: Declair, S., et al. “Anticrossing of Whispering Gallery Modes in Microdisk
Resonators Embedded in an Anisotropic Environment.” Photonics and Nanostructures
- Fundamentals and Applications, vol. 8, no. 4, Elsevier BV, 2010, pp. 273–77,
doi:10.1016/j.photonics.2010.03.002.
short: S. Declair, C. Meier, T. Meier, J. Förstner, Photonics and Nanostructures
- Fundamentals and Applications 8 (2010) 273–277.
date_created: 2018-08-27T10:19:59Z
date_updated: 2025-12-16T11:23:48Z
ddc:
- '530'
department:
- _id: '15'
- _id: '230'
- _id: '293'
- _id: '287'
- _id: '35'
- _id: '170'
- _id: '35'
- _id: '34'
- _id: '61'
doi: 10.1016/j.photonics.2010.03.002
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-27T10:21:38Z
date_updated: 2018-08-27T10:21:38Z
file_id: '4126'
file_name: 2010 Declair,Meier C, Meier T, Förstner_Anticrossing of Whispering Gallery
Modes in microdisk resonators embedded in an anisotropic environment.pdf
file_size: 304758
relation: main_file
success: 1
file_date_updated: 2018-08-27T10:21:38Z
has_accepted_license: '1'
intvolume: ' 8'
issue: '4'
keyword:
- tet_topic_microdisk
language:
- iso: eng
page: 273-277
publication: Photonics and Nanostructures - Fundamentals and Applications
publication_identifier:
issn:
- 1569-4410
publication_status: published
publisher: Elsevier BV
status: public
title: Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in
an anisotropic environment
type: journal_article
user_id: '16199'
volume: 8
year: '2010'
...
---
_id: '4547'
abstract:
- lang: eng
text: The coherent state manipulation of single quantum systems is a fundamental
requirement for the implementation of quantum information processors. Exciton
qubits are of particular interest for coherent optoelectronic applications, in
particular due to their excellent coupling to photons. Until now, coherent manipulations
of exciton qubits in semiconductor quantum dots have been performed predominantly
by pulsed laser fields. Coherent control of the population of excitonic states
with a single laser pulse, observed by Rabi oscillations, has been demonstrated
by several groups using different techniques1,2,3. By using two laser pulses,
more general state control can be achieved4, and coupling of two excitons has
been reported5,6. Here, we present a conceptually new approach for implementing
the coherent control of an exciton two-level system (qubit) by means of a time-dependent
electric interaction. The new scheme makes use of an optical clock signal and
a synchronous electric gate signal, which controls the coherent manipulation.
article_type: original
author:
- first_name: S.
full_name: Michaelis de Vasconcellos, S.
last_name: Michaelis de Vasconcellos
- first_name: S.
full_name: Gordon, S.
last_name: Gordon
- first_name: M.
full_name: Bichler, M.
last_name: Bichler
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Artur
full_name: Zrenner, Artur
id: '606'
last_name: Zrenner
orcid: 0000-0002-5190-0944
citation:
ama: Michaelis de Vasconcellos S, Gordon S, Bichler M, Meier T, Zrenner A. Coherent
control of a single exciton qubit by optoelectronic manipulation. Nature Photonics.
2010;4(8):545-548. doi:10.1038/nphoton.2010.124
apa: Michaelis de Vasconcellos, S., Gordon, S., Bichler, M., Meier, T., & Zrenner,
A. (2010). Coherent control of a single exciton qubit by optoelectronic manipulation.
Nature Photonics, 4(8), 545–548. https://doi.org/10.1038/nphoton.2010.124
bibtex: '@article{Michaelis de Vasconcellos_Gordon_Bichler_Meier_Zrenner_2010, title={Coherent
control of a single exciton qubit by optoelectronic manipulation}, volume={4},
DOI={10.1038/nphoton.2010.124},
number={8}, journal={Nature Photonics}, publisher={Springer Nature}, author={Michaelis
de Vasconcellos, S. and Gordon, S. and Bichler, M. and Meier, Torsten and Zrenner,
Artur}, year={2010}, pages={545–548} }'
chicago: 'Michaelis de Vasconcellos, S., S. Gordon, M. Bichler, Torsten Meier, and
Artur Zrenner. “Coherent Control of a Single Exciton Qubit by Optoelectronic Manipulation.”
Nature Photonics 4, no. 8 (2010): 545–48. https://doi.org/10.1038/nphoton.2010.124.'
ieee: 'S. Michaelis de Vasconcellos, S. Gordon, M. Bichler, T. Meier, and A. Zrenner,
“Coherent control of a single exciton qubit by optoelectronic manipulation,” Nature
Photonics, vol. 4, no. 8, pp. 545–548, 2010, doi: 10.1038/nphoton.2010.124.'
mla: Michaelis de Vasconcellos, S., et al. “Coherent Control of a Single Exciton
Qubit by Optoelectronic Manipulation.” Nature Photonics, vol. 4, no. 8,
Springer Nature, 2010, pp. 545–48, doi:10.1038/nphoton.2010.124.
short: S. Michaelis de Vasconcellos, S. Gordon, M. Bichler, T. Meier, A. Zrenner,
Nature Photonics 4 (2010) 545–548.
date_created: 2018-09-20T12:19:52Z
date_updated: 2025-12-16T11:22:52Z
department:
- _id: '15'
- _id: '230'
- _id: '35'
- _id: '170'
- _id: '293'
- _id: '35'
doi: 10.1038/nphoton.2010.124
intvolume: ' 4'
issue: '8'
language:
- iso: eng
page: 545-548
publication: Nature Photonics
publication_identifier:
issn:
- 1749-4885
- 1749-4893
publication_status: published
publisher: Springer Nature
status: public
title: Coherent control of a single exciton qubit by optoelectronic manipulation
type: journal_article
user_id: '16199'
volume: 4
year: '2010'
...
---
_id: '4123'
abstract:
- lang: eng
text: GaAs-based semiconductor microdisks with high quality whispering gallery modes
(Q44000) have been fabricated.A layer of self-organized InAs quantumdots (QDs)
served as a light source to feed the optical modes at room temperature. In order
to achieve frequency tuning of the optical modes, the microdisk devices have been
immersed in 4 – cyano – 4´-pentylbiphenyl (5CB), a liquid crystal(LC) with a nematic
phase below the clearing temperature of TC≈34°C .We have studied the device performance
in the temperature rangeof T=20-50°C, in order to investigate the influence of
the nematic–isotropic phase transition on the optical modes. Moreover,we havea
pplied an AC electric field to the device,which leads in the nematic phase to
a reorientation of the anisotropic dielectric tensor of the liquid crystal.This
electrical anisotropy can be used to achieve electrical tunability of the optical
modes.Using the finite-difference time domain (FDTD) technique with an anisotropic
material model, we are able to describe the influence of the liquid crystal qualitatively.
article_type: original
author:
- first_name: Karoline A.
full_name: Piegdon, Karoline A.
last_name: Piegdon
- first_name: Matthias
full_name: Offer, Matthias
last_name: Offer
- first_name: Axel
full_name: Lorke, Axel
last_name: Lorke
- first_name: Martin
full_name: Urbanski, Martin
last_name: Urbanski
- first_name: Andreas
full_name: Hoischen, Andreas
last_name: Hoischen
- first_name: Heinz-Siegfried
full_name: Kitzerow, Heinz-Siegfried
id: '254'
last_name: Kitzerow
- first_name: Stefan
full_name: Declair, Stefan
last_name: Declair
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Dirk
full_name: Reuter, Dirk
id: '37763'
last_name: Reuter
- first_name: Andreas D.
full_name: Wieck, Andreas D.
last_name: Wieck
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
citation:
ama: 'Piegdon KA, Offer M, Lorke A, et al. Self-assembled quantum dots in a liquid-crystal-tunable
microdisk resonator. Physica E: Low-dimensional Systems and Nanostructures.
2010;42(10):2552-2555. doi:10.1016/j.physe.2009.12.051'
apa: 'Piegdon, K. A., Offer, M., Lorke, A., Urbanski, M., Hoischen, A., Kitzerow,
H.-S., Declair, S., Förstner, J., Meier, T., Reuter, D., Wieck, A. D., & Meier,
C. (2010). Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator.
Physica E: Low-Dimensional Systems and Nanostructures, 42(10), 2552–2555.
https://doi.org/10.1016/j.physe.2009.12.051'
bibtex: '@article{Piegdon_Offer_Lorke_Urbanski_Hoischen_Kitzerow_Declair_Förstner_Meier_Reuter_et
al._2010, title={Self-assembled quantum dots in a liquid-crystal-tunable microdisk
resonator}, volume={42}, DOI={10.1016/j.physe.2009.12.051},
number={10}, journal={Physica E: Low-dimensional Systems and Nanostructures},
publisher={Elsevier BV}, author={Piegdon, Karoline A. and Offer, Matthias and
Lorke, Axel and Urbanski, Martin and Hoischen, Andreas and Kitzerow, Heinz-Siegfried
and Declair, Stefan and Förstner, Jens and Meier, Torsten and Reuter, Dirk and
et al.}, year={2010}, pages={2552–2555} }'
chicago: 'Piegdon, Karoline A., Matthias Offer, Axel Lorke, Martin Urbanski, Andreas
Hoischen, Heinz-Siegfried Kitzerow, Stefan Declair, et al. “Self-Assembled Quantum
Dots in a Liquid-Crystal-Tunable Microdisk Resonator.” Physica E: Low-Dimensional
Systems and Nanostructures 42, no. 10 (2010): 2552–55. https://doi.org/10.1016/j.physe.2009.12.051.'
ieee: 'K. A. Piegdon et al., “Self-assembled quantum dots in a liquid-crystal-tunable
microdisk resonator,” Physica E: Low-dimensional Systems and Nanostructures,
vol. 42, no. 10, pp. 2552–2555, 2010, doi: 10.1016/j.physe.2009.12.051.'
mla: 'Piegdon, Karoline A., et al. “Self-Assembled Quantum Dots in a Liquid-Crystal-Tunable
Microdisk Resonator.” Physica E: Low-Dimensional Systems and Nanostructures,
vol. 42, no. 10, Elsevier BV, 2010, pp. 2552–55, doi:10.1016/j.physe.2009.12.051.'
short: 'K.A. Piegdon, M. Offer, A. Lorke, M. Urbanski, A. Hoischen, H.-S. Kitzerow,
S. Declair, J. Förstner, T. Meier, D. Reuter, A.D. Wieck, C. Meier, Physica E:
Low-Dimensional Systems and Nanostructures 42 (2010) 2552–2555.'
date_created: 2018-08-27T10:03:35Z
date_updated: 2025-12-16T11:32:03Z
ddc:
- '530'
department:
- _id: '15'
- _id: '230'
- _id: '2'
- _id: '293'
- _id: '292'
- _id: '35'
- _id: '287'
- _id: '313'
- _id: '170'
doi: 10.1016/j.physe.2009.12.051
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-27T10:06:57Z
date_updated: 2018-08-27T10:06:57Z
file_id: '4124'
file_name: 2010 Piegdon,Offer,Lork,Urbanski,Hoischen,Kitzerwo, Declair,Förstner_Self-assembled
quantum dots in a liquid-crystal-tunable microdisk resonator.pdf
file_size: 403248
relation: main_file
success: 1
file_date_updated: 2018-08-27T10:06:57Z
has_accepted_license: '1'
intvolume: ' 42'
issue: '10'
keyword:
- tet_topic_qd
- tet_topic_microdisk
language:
- iso: eng
page: 2552-2555
publication: 'Physica E: Low-dimensional Systems and Nanostructures'
publication_identifier:
issn:
- 1386-9477
publication_status: published
publisher: Elsevier BV
status: public
title: Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator
type: journal_article
user_id: '16199'
volume: 42
year: '2010'
...
---
_id: '4169'
abstract:
- lang: eng
text: "It is demonstrated that valence-band mixing in GaAs quantum wells tremendously
modifies electronic\r\ntransport. A coherent control scheme in which ultrafast
currents are optically injected into undoped GaAs\r\nquantum wells upon excitation
with femtosecond laser pulses is employed. An oscillatory dependence of\r\nthe
injection current amplitude and direction on the excitation photon energy is observed.
A microscopic\r\ntheoretical analysis shows that this current reversal is caused
by the coupling of the light- and heavy-hole\r\nbands and that the hole currents
dominate the overall current response. These surprising consequences of\r\nband
mixing illuminate fundamental physics as they are unique for experiments which
are able to monitor\r\nelectronic transport resulting from carriers with relatively
large momenta."
article_number: '217401'
article_type: original
author:
- first_name: S.
full_name: Priyadarshi, S.
last_name: Priyadarshi
- first_name: A. M.
full_name: Racu, A. M.
last_name: Racu
- first_name: K.
full_name: Pierz, K.
last_name: Pierz
- first_name: U.
full_name: Siegner, U.
last_name: Siegner
- first_name: M.
full_name: Bieler, M.
last_name: Bieler
- first_name: H. T.
full_name: Duc, H. T.
last_name: Duc
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: Priyadarshi S, Racu AM, Pierz K, et al. Reversal of Coherently Controlled Ultrafast
Photocurrents by Band Mixing in Undoped GaAs Quantum Wells. Physical Review
Letters. 2010;104(21). doi:10.1103/physrevlett.104.217401
apa: Priyadarshi, S., Racu, A. M., Pierz, K., Siegner, U., Bieler, M., Duc, H. T.,
Förstner, J., & Meier, T. (2010). Reversal of Coherently Controlled Ultrafast
Photocurrents by Band Mixing in Undoped GaAs Quantum Wells. Physical Review
Letters, 104(21), Article 217401. https://doi.org/10.1103/physrevlett.104.217401
bibtex: '@article{Priyadarshi_Racu_Pierz_Siegner_Bieler_Duc_Förstner_Meier_2010,
title={Reversal of Coherently Controlled Ultrafast Photocurrents by Band Mixing
in Undoped GaAs Quantum Wells}, volume={104}, DOI={10.1103/physrevlett.104.217401},
number={21217401}, journal={Physical Review Letters}, publisher={American Physical
Society (APS)}, author={Priyadarshi, S. and Racu, A. M. and Pierz, K. and Siegner,
U. and Bieler, M. and Duc, H. T. and Förstner, Jens and Meier, Torsten}, year={2010}
}'
chicago: Priyadarshi, S., A. M. Racu, K. Pierz, U. Siegner, M. Bieler, H. T. Duc,
Jens Förstner, and Torsten Meier. “Reversal of Coherently Controlled Ultrafast
Photocurrents by Band Mixing in Undoped GaAs Quantum Wells.” Physical Review
Letters 104, no. 21 (2010). https://doi.org/10.1103/physrevlett.104.217401.
ieee: 'S. Priyadarshi et al., “Reversal of Coherently Controlled Ultrafast
Photocurrents by Band Mixing in Undoped GaAs Quantum Wells,” Physical Review
Letters, vol. 104, no. 21, Art. no. 217401, 2010, doi: 10.1103/physrevlett.104.217401.'
mla: Priyadarshi, S., et al. “Reversal of Coherently Controlled Ultrafast Photocurrents
by Band Mixing in Undoped GaAs Quantum Wells.” Physical Review Letters,
vol. 104, no. 21, 217401, American Physical Society (APS), 2010, doi:10.1103/physrevlett.104.217401.
short: S. Priyadarshi, A.M. Racu, K. Pierz, U. Siegner, M. Bieler, H.T. Duc, J.
Förstner, T. Meier, Physical Review Letters 104 (2010).
date_created: 2018-08-28T08:40:16Z
date_updated: 2025-12-16T11:32:36Z
ddc:
- '530'
department:
- _id: '15'
- _id: '293'
- _id: '170'
- _id: '230'
- _id: '35'
- _id: '34'
- _id: '61'
- _id: '27'
doi: 10.1103/physrevlett.104.217401
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-28T08:41:56Z
date_updated: 2018-08-28T08:41:56Z
file_id: '4170'
file_name: 2010 Priyadarshi,Racu,Pierz,Siegner,Bieler,Duc,Förstner,Meier T_Reversal
of coherently controlled ultrafast photocurrents by band mixing in undoped GaAs
quantum wells.pdf
file_size: 447293
relation: main_file
success: 1
file_date_updated: 2018-08-28T08:41:56Z
has_accepted_license: '1'
intvolume: ' 104'
issue: '21'
keyword:
- tet_topic_qw
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Physical Review Letters
publication_identifier:
issn:
- 0031-9007
- 1079-7114
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Reversal of Coherently Controlled Ultrafast Photocurrents by Band Mixing in
Undoped GaAs Quantum Wells
type: journal_article
user_id: '16199'
volume: 104
year: '2010'
...
---
_id: '4167'
abstract:
- lang: eng
text: "The electromagnetic field in the vicinity of sharp edges needs a special
treatment in numeric calculation whenever accurate, fast converging results are
necessary. One of the fundamental works concerning field singularities has been
proposed in 1972 [1] and states that the electromagnetic energy density must be
integrable over any finite\r\ndomain, even if this domain contains singularities.
It is shown, that the magnetic field \x02H(\x03, ϕ) and electric field \x02E(\x03,
ϕ) are proportional to ∝ \x03(t−1) for \x03 → 0. The variable \x03 is the distance
to the edge and t has to fulfill the integrability condition and thus is restricted
to 0 < t < 1. This result is often used to reduce the error corresponding to the
singularity without increasing the numerical effort [2 - 5]. For this purpose,
a correction factor K is estimated by inserting the proportionality into the wave
equation. It is shown, that this method improves the accuracy of the result significantly,
however the order of convergence is often not studied. In [4] a method to modify
the material parameters in order to use analytic results to improve the numeric
calculation is presented. In this contribution we will - inspired by the scheme
given in [4] - develop a new method to estimate a correction factor for perfect
conducting materials (PEC) and demonstrate the improvement of the results compared
to the standard edge correction. Therefore analytic results (comparable to [1])
are consequently merged with the scheme in [4]. The main goal of this work is
the calculation of the second harmonic generation (SHG) in the wave response of
so-called metamaterials [6]. Frequently these structures\r\ncontain sharp metallic
edges with field singularities at the interfaces which have a strong impact on
the SHG signals. Thus, an accurate simulation of singularities is highly important.
However, the following approach can also be applied to many other setups, and
one of them is shown in the example below."
article_number: '11515155 '
author:
- first_name: C
full_name: Classen, C
last_name: Classen
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: R
full_name: Schuhmann, R
last_name: Schuhmann
citation:
ama: 'Classen C, Förstner J, Meier T, Schuhmann R. Enhanced FDTD edge correction
for nonlinear effects calculation. In: 2010 IEEE Antennas and Propagation Society
International Symposium. IEEE; 2010. doi:10.1109/aps.2010.5562017'
apa: Classen, C., Förstner, J., Meier, T., & Schuhmann, R. (2010). Enhanced
FDTD edge correction for nonlinear effects calculation. 2010 IEEE Antennas
and Propagation Society International Symposium, Article 11515155. 2010 IEEE
international Symposium Antennas, Toronto, ON, Canada. https://doi.org/10.1109/aps.2010.5562017
bibtex: '@inproceedings{Classen_Förstner_Meier_Schuhmann_2010, title={Enhanced FDTD
edge correction for nonlinear effects calculation}, DOI={10.1109/aps.2010.5562017},
number={11515155}, booktitle={2010 IEEE Antennas and Propagation Society International
Symposium}, publisher={IEEE}, author={Classen, C and Förstner, Jens and Meier,
Torsten and Schuhmann, R}, year={2010} }'
chicago: Classen, C, Jens Förstner, Torsten Meier, and R Schuhmann. “Enhanced FDTD
Edge Correction for Nonlinear Effects Calculation.” In 2010 IEEE Antennas and
Propagation Society International Symposium. IEEE, 2010. https://doi.org/10.1109/aps.2010.5562017.
ieee: 'C. Classen, J. Förstner, T. Meier, and R. Schuhmann, “Enhanced FDTD edge
correction for nonlinear effects calculation,” presented at the 2010 IEEE international
Symposium Antennas, Toronto, ON, Canada, 2010, doi: 10.1109/aps.2010.5562017.'
mla: Classen, C., et al. “Enhanced FDTD Edge Correction for Nonlinear Effects Calculation.”
2010 IEEE Antennas and Propagation Society International Symposium, 11515155,
IEEE, 2010, doi:10.1109/aps.2010.5562017.
short: 'C. Classen, J. Förstner, T. Meier, R. Schuhmann, in: 2010 IEEE Antennas
and Propagation Society International Symposium, IEEE, 2010.'
conference:
end_date: 2010-07-17
location: Toronto, ON, Canada
name: 2010 IEEE international Symposium Antennas
start_date: 2010-07-11
date_created: 2018-08-28T08:34:52Z
date_updated: 2025-12-16T12:35:39Z
ddc:
- '530'
department:
- _id: '61'
- _id: '15'
- _id: '293'
- _id: '170'
- _id: '230'
- _id: '35'
- _id: '34'
doi: 10.1109/aps.2010.5562017
file:
- access_level: open_access
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-28T08:36:44Z
date_updated: 2018-09-04T19:31:42Z
file_id: '4168'
file_name: 2010 Classen,Förstner, Meier T,Schuhmann_Enhanced FDTD edge correction
for nonlinear effects calculation.pdf
file_size: 209412
relation: main_file
file_date_updated: 2018-09-04T19:31:42Z
has_accepted_license: '1'
keyword:
- tet_topic_numerics
language:
- iso: eng
oa: '1'
publication: 2010 IEEE Antennas and Propagation Society International Symposium
publication_identifier:
isbn:
- '9781424449675'
- '9781424449682'
publication_status: published
publisher: IEEE
status: public
title: Enhanced FDTD edge correction for nonlinear effects calculation
type: conference
urn: '41677'
user_id: '16199'
year: '2010'
...
---
_id: '4172'
abstract:
- lang: eng
text: "Microdisks made from GaAs with embedded InAs quantum dots are immersed in
the liquid crystal 4-cyano-4’-pentylbiphenyl (5CB). The quantum dots serve as
emitters feeding the optical modes of the photonic cavity. By changing temperature,
the liquid crystal undergoes a phase transition from the isotropic to the nematic
state, which can be used\r\nas an effective tuning mechanism of the photonic modes
of the cavity. In the nematic state, the uniaxial electrical anisotropy of the
liquid crystal molecules can be exploited for orienting the material in an electric
field,\r\nthus externally controlling the birefringence of the material. Using
this effect, an electric field induced tuning of the modes is achieved. Numerical
simulations using the finite-differences time-domain (FDTD) technique\r\nemploying
an anisotropic dielectric medium allow to understand the alignment of the liquid
crystal molecules on the surface of the microdisk resonator."
article_number: '7946'
article_type: original
author:
- first_name: Karoline A.
full_name: Piegdon, Karoline A.
last_name: Piegdon
- first_name: Stefan
full_name: Declair, Stefan
last_name: Declair
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Heiner
full_name: Matthias, Heiner
last_name: Matthias
- first_name: Martin
full_name: Urbanski, Martin
last_name: Urbanski
- first_name: Heinz-Siegfried
full_name: Kitzerow, Heinz-Siegfried
id: '254'
last_name: Kitzerow
- first_name: Dirk
full_name: Reuter, Dirk
id: '37763'
last_name: Reuter
- first_name: Andreas D.
full_name: Wieck, Andreas D.
last_name: Wieck
- first_name: Axel
full_name: Lorke, Axel
last_name: Lorke
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
citation:
ama: Piegdon KA, Declair S, Förstner J, et al. Tuning quantum-dot based photonic
devices with liquid crystals. Optics Express. 2010;18(8). doi:10.1364/oe.18.007946
apa: Piegdon, K. A., Declair, S., Förstner, J., Meier, T., Matthias, H., Urbanski,
M., Kitzerow, H.-S., Reuter, D., Wieck, A. D., Lorke, A., & Meier, C. (2010).
Tuning quantum-dot based photonic devices with liquid crystals. Optics Express,
18(8), Article 7946. https://doi.org/10.1364/oe.18.007946
bibtex: '@article{Piegdon_Declair_Förstner_Meier_Matthias_Urbanski_Kitzerow_Reuter_Wieck_Lorke_et
al._2010, title={Tuning quantum-dot based photonic devices with liquid crystals},
volume={18}, DOI={10.1364/oe.18.007946},
number={87946}, journal={Optics Express}, publisher={The Optical Society}, author={Piegdon,
Karoline A. and Declair, Stefan and Förstner, Jens and Meier, Torsten and Matthias,
Heiner and Urbanski, Martin and Kitzerow, Heinz-Siegfried and Reuter, Dirk and
Wieck, Andreas D. and Lorke, Axel and et al.}, year={2010} }'
chicago: Piegdon, Karoline A., Stefan Declair, Jens Förstner, Torsten Meier, Heiner
Matthias, Martin Urbanski, Heinz-Siegfried Kitzerow, et al. “Tuning Quantum-Dot
Based Photonic Devices with Liquid Crystals.” Optics Express 18, no. 8
(2010). https://doi.org/10.1364/oe.18.007946.
ieee: 'K. A. Piegdon et al., “Tuning quantum-dot based photonic devices with
liquid crystals,” Optics Express, vol. 18, no. 8, Art. no. 7946, 2010,
doi: 10.1364/oe.18.007946.'
mla: Piegdon, Karoline A., et al. “Tuning Quantum-Dot Based Photonic Devices with
Liquid Crystals.” Optics Express, vol. 18, no. 8, 7946, The Optical Society,
2010, doi:10.1364/oe.18.007946.
short: K.A. Piegdon, S. Declair, J. Förstner, T. Meier, H. Matthias, M. Urbanski,
H.-S. Kitzerow, D. Reuter, A.D. Wieck, A. Lorke, C. Meier, Optics Express 18 (2010).
date_created: 2018-08-28T08:50:06Z
date_updated: 2025-12-16T16:44:44Z
ddc:
- '530'
department:
- _id: '15'
- _id: '287'
- _id: '293'
- _id: '292'
- _id: '35'
- _id: '230'
- _id: '313'
- _id: '170'
- _id: '27'
- _id: '34'
- _id: '61'
doi: 10.1364/oe.18.007946
file:
- access_level: open_access
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-28T08:52:50Z
date_updated: 2018-09-04T20:02:01Z
file_id: '4173'
file_name: 2010 Piegdon,Declair,Förstner,Meier T,Matthias,Urbanski,Kitzerow,Reuter,Wieck,Lorcke,Meier
C_Tuning quantum-dot based photonic devices with liquid crystals.pdf
file_size: 627755
relation: main_file
file_date_updated: 2018-09-04T20:02:01Z
has_accepted_license: '1'
intvolume: ' 18'
issue: '8'
keyword:
- tet_topic_qd
- tet_topic_microdisk
language:
- iso: eng
oa: '1'
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: The Optical Society
status: public
title: Tuning quantum-dot based photonic devices with liquid crystals
type: journal_article
urn: '41725'
user_id: '16199'
volume: 18
year: '2010'
...
---
_id: '44108'
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Tianhao
full_name: Zhang, Tianhao
last_name: Zhang
- first_name: Irina
full_name: Kuznetsova, Irina
last_name: Kuznetsova
- first_name: Lijun
full_name: Yang, Lijun
last_name: Yang
- first_name: Alan D
full_name: Bristow, Alan D
last_name: Bristow
- first_name: Xingcan
full_name: Dai, Xingcan
last_name: Dai
- first_name: Xiaoqin
full_name: Li, Xiaoqin
last_name: Li
- first_name: P.
full_name: Thomas, P.
last_name: Thomas
- first_name: S.
full_name: Mukamel, S.
last_name: Mukamel
- first_name: Richard P.
full_name: Mirin, Richard P.
last_name: Mirin
- first_name: S.T.
full_name: Cundiff, S.T.
last_name: Cundiff
citation:
ama: 'Meier T, Zhang T, Kuznetsova I, et al. Ultrafast Coherent Interactions in
Quantum Wells Studied by Two-Dimensional Fourier Transform Spectroscopy. In: Ultrafast
Phenomena XVI: Proceedings of the 16th International Conference, Palazzo Dei Congressi
Stresa, Italy, June 9--13, 2008. Springer Berlin Heidelberg; 2009:247-249.'
apa: 'Meier, T., Zhang, T., Kuznetsova, I., Yang, L., Bristow, A. D., Dai, X., Li,
X., Thomas, P., Mukamel, S., Mirin, R. P., & Cundiff, S. T. (2009). Ultrafast
Coherent Interactions in Quantum Wells Studied by Two-Dimensional Fourier Transform
Spectroscopy. Ultrafast Phenomena XVI: Proceedings of the 16th International
Conference, Palazzo Dei Congressi Stresa, Italy, June 9--13, 2008, 247–249.'
bibtex: '@inproceedings{Meier_Zhang_Kuznetsova_Yang_Bristow_Dai_Li_Thomas_Mukamel_Mirin_et
al._2009, title={Ultrafast Coherent Interactions in Quantum Wells Studied by Two-Dimensional
Fourier Transform Spectroscopy}, booktitle={Ultrafast Phenomena XVI: Proceedings
of the 16th International Conference, Palazzo dei Congressi Stresa, Italy, June
9--13, 2008}, publisher={Springer Berlin Heidelberg}, author={Meier, Torsten and
Zhang, Tianhao and Kuznetsova, Irina and Yang, Lijun and Bristow, Alan D and Dai,
Xingcan and Li, Xiaoqin and Thomas, P. and Mukamel, S. and Mirin, Richard P. and
et al.}, year={2009}, pages={247–249} }'
chicago: 'Meier, Torsten, Tianhao Zhang, Irina Kuznetsova, Lijun Yang, Alan D Bristow,
Xingcan Dai, Xiaoqin Li, et al. “Ultrafast Coherent Interactions in Quantum Wells
Studied by Two-Dimensional Fourier Transform Spectroscopy.” In Ultrafast Phenomena
XVI: Proceedings of the 16th International Conference, Palazzo Dei Congressi Stresa,
Italy, June 9--13, 2008, 247–49. Springer Berlin Heidelberg, 2009.'
ieee: 'T. Meier et al., “Ultrafast Coherent Interactions in Quantum Wells
Studied by Two-Dimensional Fourier Transform Spectroscopy,” in Ultrafast Phenomena
XVI: Proceedings of the 16th International Conference, Palazzo dei Congressi Stresa,
Italy, June 9--13, 2008, Palazzo dei Congressi Stresa, Italy, 2009, pp. 247–249.'
mla: 'Meier, Torsten, et al. “Ultrafast Coherent Interactions in Quantum Wells Studied
by Two-Dimensional Fourier Transform Spectroscopy.” Ultrafast Phenomena XVI:
Proceedings of the 16th International Conference, Palazzo Dei Congressi Stresa,
Italy, June 9--13, 2008, Springer Berlin Heidelberg, 2009, pp. 247–49.'
short: 'T. Meier, T. Zhang, I. Kuznetsova, L. Yang, A.D. Bristow, X. Dai, X. Li,
P. Thomas, S. Mukamel, R.P. Mirin, S.T. Cundiff, in: Ultrafast Phenomena XVI:
Proceedings of the 16th International Conference, Palazzo Dei Congressi Stresa,
Italy, June 9--13, 2008, Springer Berlin Heidelberg, 2009, pp. 247–249.'
conference:
end_date: 2008-06-13
location: Palazzo dei Congressi Stresa, Italy
name: 'Ultrafast Phenomena XVI: Proceedings of the 16th International Conference'
start_date: 2008-06-09
date_created: 2023-04-21T22:00:44Z
date_updated: 2023-04-21T22:00:47Z
department:
- _id: '293'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://books.google.de/books?hl=en&lr=&id=rvtIAqNmgC4C&oi=fnd&pg=PA247&dq=info:q2sTDszkkRMJ:scholar.google.com&ots=-aXLlDdmG9&sig=4zByzihgk29LwWZAildxmlDXPd0&redir_esc=y#v=onepage&q&f=false
oa: '1'
page: 247-249
publication: 'Ultrafast Phenomena XVI: Proceedings of the 16th International Conference,
Palazzo dei Congressi Stresa, Italy, June 9--13, 2008'
publication_status: published
publisher: Springer Berlin Heidelberg
status: public
title: Ultrafast Coherent Interactions in Quantum Wells Studied by Two-Dimensional
Fourier Transform Spectroscopy
type: conference
user_id: '49063'
year: '2009'
...
---
_id: '44107'
abstract:
- lang: eng
text: We demonstrate a technique for the generation and detection of electron currents
at surfaces on a femtosecond time scale with a contact-free experimental setup
based on a combination of coherent control and photoemission spectroscopy. We
have applied this technique for electrons excited into image-potential states
on a Cu(100) surface that form a free-electron-like band in the direction parallel
to the surface. The photogeneration of currents is described by optical Bloch
equations for a multiband model. By incorporating field-induced interband and
intersubband transitions together with intraband accelerations into the model,
the observed phase dependence of the population and of the current can be reproduced.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Jens
full_name: Güdde, Jens
last_name: Güdde
- first_name: M.
full_name: Rohleder, M.
last_name: Rohleder
- first_name: S.W.
full_name: Koch, S.W.
last_name: Koch
- first_name: Ulrich
full_name: Höfer, Ulrich
last_name: Höfer
citation:
ama: Meier T, Güdde J, Rohleder M, Koch SW, Höfer U. Generation and time‐resolved
detection of coherently controlled electric currents at surfaces. physica status
solidi c. 2009;6(2):461-465. doi:10.1002/pssc.200880350
apa: Meier, T., Güdde, J., Rohleder, M., Koch, S. W., & Höfer, U. (2009). Generation
and time‐resolved detection of coherently controlled electric currents at surfaces.
Physica Status Solidi c, 6(2), 461–465. https://doi.org/10.1002/pssc.200880350
bibtex: '@article{Meier_Güdde_Rohleder_Koch_Höfer_2009, title={Generation and time‐resolved
detection of coherently controlled electric currents at surfaces}, volume={6},
DOI={10.1002/pssc.200880350},
number={2}, journal={physica status solidi c}, publisher={WILEY‐VCH Verlag}, author={Meier,
Torsten and Güdde, Jens and Rohleder, M. and Koch, S.W. and Höfer, Ulrich}, year={2009},
pages={461–465} }'
chicago: 'Meier, Torsten, Jens Güdde, M. Rohleder, S.W. Koch, and Ulrich Höfer.
“Generation and Time‐resolved Detection of Coherently Controlled Electric Currents
at Surfaces.” Physica Status Solidi c 6, no. 2 (2009): 461–65. https://doi.org/10.1002/pssc.200880350.'
ieee: 'T. Meier, J. Güdde, M. Rohleder, S. W. Koch, and U. Höfer, “Generation and
time‐resolved detection of coherently controlled electric currents at surfaces,”
physica status solidi c, vol. 6, no. 2, pp. 461–465, 2009, doi: 10.1002/pssc.200880350.'
mla: Meier, Torsten, et al. “Generation and Time‐resolved Detection of Coherently
Controlled Electric Currents at Surfaces.” Physica Status Solidi c, vol.
6, no. 2, WILEY‐VCH Verlag, 2009, pp. 461–65, doi:10.1002/pssc.200880350.
short: T. Meier, J. Güdde, M. Rohleder, S.W. Koch, U. Höfer, Physica Status Solidi
c 6 (2009) 461–465.
date_created: 2023-04-21T21:53:57Z
date_updated: 2023-04-21T21:54:00Z
department:
- _id: '293'
doi: 10.1002/pssc.200880350
intvolume: ' 6'
issue: '2'
language:
- iso: eng
main_file_link:
- url: https://onlinelibrary.wiley.com/doi/abs/10.1002/pssc.200880350
page: 461-465
publication: physica status solidi c
publication_status: published
publisher: WILEY‐VCH Verlag
status: public
title: Generation and time‐resolved detection of coherently controlled electric currents
at surfaces
type: journal_article
user_id: '49063'
volume: 6
year: '2009'
...
---
_id: '4179'
abstract:
- lang: eng
text: 'We numerically investigate Whispering Gallery Modes (WGM) in a subwavelength
microdisk resonator [1] embedded in an uniaxial anisotropic liquid crystal environment.
It is shown that the WGMs have anticrossing behavior when modes of different radial
mode order M or azimuthal order N approach each other spectrally. '
author:
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: S.
full_name: Declair, S.
last_name: Declair
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: 'Förstner J, Declair S, Meier C, Meier T. Anticrossing of Whispering Gallery
Modes in Microdisk Resonators Embedded in a Liquid Crystal. In: Theoretical
and Computational Nanophotonics Tacona-Photonics. Vol 1176. AIP Conference
Proceedings . ; 2009:60-62. doi:10.1063/1.3253921'
apa: Förstner, J., Declair, S., Meier, C., & Meier, T. (2009). Anticrossing
of Whispering Gallery Modes in Microdisk Resonators Embedded in a Liquid Crystal.
Theoretical and Computational Nanophotonics Tacona-Photonics, 1176(1),
60–62. https://doi.org/10.1063/1.3253921
bibtex: '@inproceedings{Förstner_Declair_Meier_Meier_2009, series={AIP Conference
Proceedings }, title={Anticrossing of Whispering Gallery Modes in Microdisk Resonators
Embedded in a Liquid Crystal}, volume={1176}, DOI={10.1063/1.3253921},
number={1}, booktitle={Theoretical and Computational Nanophotonics Tacona-Photonics},
author={Förstner, Jens and Declair, S. and Meier, Cedrik and Meier, Torsten},
year={2009}, pages={60–62}, collection={AIP Conference Proceedings } }'
chicago: Förstner, Jens, S. Declair, Cedrik Meier, and Torsten Meier. “Anticrossing
of Whispering Gallery Modes in Microdisk Resonators Embedded in a Liquid Crystal.”
In Theoretical and Computational Nanophotonics Tacona-Photonics, 1176:60–62.
AIP Conference Proceedings , 2009. https://doi.org/10.1063/1.3253921.
ieee: 'J. Förstner, S. Declair, C. Meier, and T. Meier, “Anticrossing of Whispering
Gallery Modes in Microdisk Resonators Embedded in a Liquid Crystal,” in Theoretical
and Computational Nanophotonics Tacona-Photonics, Tacona, 2009, vol. 1176,
no. 1, pp. 60–62, doi: 10.1063/1.3253921.'
mla: Förstner, Jens, et al. “Anticrossing of Whispering Gallery Modes in Microdisk
Resonators Embedded in a Liquid Crystal.” Theoretical and Computational Nanophotonics
Tacona-Photonics, vol. 1176, no. 1, 2009, pp. 60–62, doi:10.1063/1.3253921.
short: 'J. Förstner, S. Declair, C. Meier, T. Meier, in: Theoretical and Computational
Nanophotonics Tacona-Photonics, 2009, pp. 60–62.'
conference:
end_date: 2009-10-28
location: Tacona
name: Theoretical and Computational Nanophotonics Tacona-Photonics
start_date: 2009-10-28
date_created: 2018-08-28T09:17:05Z
date_updated: 2023-04-19T11:13:59Z
department:
- _id: '15'
- _id: '293'
- _id: '287'
- _id: '35'
- _id: '170'
- _id: '230'
doi: 10.1063/1.3253921
intvolume: ' 1176'
issue: '1'
keyword:
- tet_topic_microdisk
language:
- iso: eng
page: 60-62
publication: Theoretical and Computational Nanophotonics Tacona-Photonics
publication_status: published
series_title: 'AIP Conference Proceedings '
status: public
title: Anticrossing of Whispering Gallery Modes in Microdisk Resonators Embedded in
a Liquid Crystal
type: conference
user_id: '49063'
volume: 1176
year: '2009'
...
---
_id: '44069'
abstract:
- lang: eng
text: Recently it has been shown experimentally that it is possible to coherently
control nano-optical excitations by using sophisticated shaped laser pulses. In
this work a similar technique is used to theoretically investigate a hybrid nanostructure
which consists of a metal aperture and a quantum wire. It is shown that one can
concentrate the optically excited electron density at an arbitrary position due
to wave packet dynamics by chosing particular frequency components and phases
of the chirped laser pulse. The optimization process is performed with a genetic
algorithm which is linked to a 3D-FDTD solver.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Matthias
full_name: Reichelt, Matthias
id: '138'
last_name: Reichelt
citation:
ama: 'Meier T, Reichelt M. Coherent control in hybrid metal-semiconductor nanostructures.
In: DPG Spring Meeting 2009. Vol 44. Verhandlungen der Deutschen Physikalischen
Gesellschaft. ; 2009.'
apa: Meier, T., & Reichelt, M. (2009). Coherent control in hybrid metal-semiconductor
nanostructures. DPG Spring Meeting 2009, 44(5).
bibtex: '@inproceedings{Meier_Reichelt_2009, series={Verhandlungen der Deutschen
Physikalischen Gesellschaft}, title={Coherent control in hybrid metal-semiconductor
nanostructures}, volume={44}, number={5}, booktitle={DPG Spring meeting 2009},
author={Meier, Torsten and Reichelt, Matthias}, year={2009}, collection={Verhandlungen
der Deutschen Physikalischen Gesellschaft} }'
chicago: Meier, Torsten, and Matthias Reichelt. “Coherent Control in Hybrid Metal-Semiconductor
Nanostructures.” In DPG Spring Meeting 2009, Vol. 44. Verhandlungen Der
Deutschen Physikalischen Gesellschaft, 2009.
ieee: T. Meier and M. Reichelt, “Coherent control in hybrid metal-semiconductor
nanostructures,” in DPG Spring meeting 2009, Dresden, Germany, 2009, vol.
44, no. 5.
mla: Meier, Torsten, and Matthias Reichelt. “Coherent Control in Hybrid Metal-Semiconductor
Nanostructures.” DPG Spring Meeting 2009, vol. 44, no. 5, 2009.
short: 'T. Meier, M. Reichelt, in: DPG Spring Meeting 2009, 2009.'
conference:
end_date: 2009-03-27
location: Dresden, Germany
name: DPG Spring meeting 2009
start_date: 2009-03-22
date_created: 2023-04-19T11:46:47Z
date_updated: 2023-04-19T11:46:49Z
department:
- _id: '293'
intvolume: ' 44'
issue: '5'
language:
- iso: eng
main_file_link:
- url: https://www.dpg-verhandlungen.de/year/2009/conference/dresden/part/o/session/31
publication: DPG Spring meeting 2009
publication_identifier:
issn:
- 0420-0195
publication_status: published
series_title: Verhandlungen der Deutschen Physikalischen Gesellschaft
status: public
title: Coherent control in hybrid metal-semiconductor nanostructures
type: conference
user_id: '49063'
volume: 44
year: '2009'
...
---
_id: '23481'
abstract:
- lang: eng
text: A one-dimensional semiconductor nanostructure is locally excited through a
metal aperture. It is shown that the electron density can be coherently localized
at desired spatial and temporal positions by using nontrivially shaped laser pulses.
To obtain the optimized laser field, Bloch equations for a tight-binding model
system are solved together with a genetic pulse-shaping algorithm. Full three-dimensional
finite-difference time-domain (FDTD) simulations of the Maxwell–Bloch equations
confirm the predicted coherent spatiotemporal control.
author:
- first_name: Matthias
full_name: Reichelt, Matthias
id: '138'
last_name: Reichelt
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: Reichelt M, Meier T. Shaping the spatiotemporal dynamics of the electron density
in a hybrid metal-semiconductor nanostructure. Optics Letters. 2009;34(19):2900-2902.
doi:10.1364/ol.34.002900
apa: Reichelt, M., & Meier, T. (2009). Shaping the spatiotemporal dynamics of
the electron density in a hybrid metal-semiconductor nanostructure. Optics
Letters, 34(19), 2900–2902. https://doi.org/10.1364/ol.34.002900
bibtex: '@article{Reichelt_Meier_2009, title={Shaping the spatiotemporal dynamics
of the electron density in a hybrid metal-semiconductor nanostructure}, volume={34},
DOI={10.1364/ol.34.002900},
number={19}, journal={Optics Letters}, author={Reichelt, Matthias and Meier, Torsten},
year={2009}, pages={2900–2902} }'
chicago: 'Reichelt, Matthias, and Torsten Meier. “Shaping the Spatiotemporal Dynamics
of the Electron Density in a Hybrid Metal-Semiconductor Nanostructure.” Optics
Letters 34, no. 19 (2009): 2900–2902. https://doi.org/10.1364/ol.34.002900.'
ieee: 'M. Reichelt and T. Meier, “Shaping the spatiotemporal dynamics of the electron
density in a hybrid metal-semiconductor nanostructure,” Optics Letters,
vol. 34, no. 19, pp. 2900–2902, 2009, doi: 10.1364/ol.34.002900.'
mla: Reichelt, Matthias, and Torsten Meier. “Shaping the Spatiotemporal Dynamics
of the Electron Density in a Hybrid Metal-Semiconductor Nanostructure.” Optics
Letters, vol. 34, no. 19, 2009, pp. 2900–02, doi:10.1364/ol.34.002900.
short: M. Reichelt, T. Meier, Optics Letters 34 (2009) 2900–2902.
date_created: 2021-08-24T08:59:15Z
date_updated: 2023-04-19T11:16:09Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
doi: 10.1364/ol.34.002900
intvolume: ' 34'
issue: '19'
language:
- iso: eng
page: 2900-2902
publication: Optics Letters
publication_identifier:
issn:
- 0146-9592
- 1539-4794
publication_status: published
status: public
title: Shaping the spatiotemporal dynamics of the electron density in a hybrid metal-semiconductor
nanostructure
type: journal_article
user_id: '49063'
volume: 34
year: '2009'
...
---
_id: '4184'
abstract:
- lang: eng
text: We have experimentally investigated injection currents generated by all-optical
excitation of GaAs/AlGaAs quantum wells excited with 130 fs optical pulses. The
currents have been detected via free-space THz experiments at room temperature.
Our experiments prove that Coulomb effects strongly influence injection currents.
This becomes most prominently visible when exciting light-hole exciton transitions.
At this photon energy we observe a pronounced phase shift of the current transients
which is due to oppositely oriented heavy-hole and light-hole type contributions.
We are currently developing a microscopic theory based on a 14×14 k.p model in
combination with the semiconductor Bloch equations to describe the observed features
quantitatively. The combined theoretical and experimental approach will allow
us to analyze the influence of the bandstructure and interaction effects on the
injection current amplitude and current dynamics.
author:
- first_name: M.
full_name: Bieler, M.
last_name: Bieler
- first_name: K.
full_name: Pierz, K.
last_name: Pierz
- first_name: U.
full_name: Siegner, U.
last_name: Siegner
- first_name: P.
full_name: Dawson, P.
last_name: Dawson
- first_name: H. T.
full_name: Duc, H. T.
last_name: Duc
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: 'Bieler M, Pierz K, Siegner U, et al. Generation of injection currents in (110)-oriented
GaAs quantum wells: experimental observation and development of a microscopic
theory. In: Tsen K-T, Song J-J, Betz M, Elezzabi AY, eds. Ultrafast Phenomena
in Semiconductors and Nanostructure Materials XIII. Vol 7214. SPIE Proceedings.
SPIE; 2009:721404-721404-721413. doi:10.1117/12.811841'
apa: 'Bieler, M., Pierz, K., Siegner, U., Dawson, P., Duc, H. T., Förstner, J.,
& Meier, T. (2009). Generation of injection currents in (110)-oriented GaAs
quantum wells: experimental observation and development of a microscopic theory.
In K.-T. Tsen, J.-J. Song, M. Betz, & A. Y. Elezzabi (Eds.), Ultrafast
Phenomena in Semiconductors and Nanostructure Materials XIII (Vol. 7214, pp.
721404-721404–721413). SPIE. https://doi.org/10.1117/12.811841'
bibtex: '@inproceedings{Bieler_Pierz_Siegner_Dawson_Duc_Förstner_Meier_2009, series={SPIE
Proceedings}, title={Generation of injection currents in (110)-oriented GaAs quantum
wells: experimental observation and development of a microscopic theory}, volume={7214},
DOI={10.1117/12.811841}, booktitle={Ultrafast
Phenomena in Semiconductors and Nanostructure Materials XIII}, publisher={SPIE},
author={Bieler, M. and Pierz, K. and Siegner, U. and Dawson, P. and Duc, H. T.
and Förstner, Jens and Meier, Torsten}, editor={Tsen, Kong-Thon and Song, Jin-Joo
and Betz, Markus and Elezzabi, Abdulhakem Y.}, year={2009}, pages={721404-721404–13},
collection={SPIE Proceedings} }'
chicago: 'Bieler, M., K. Pierz, U. Siegner, P. Dawson, H. T. Duc, Jens Förstner,
and Torsten Meier. “Generation of Injection Currents in (110)-Oriented GaAs Quantum
Wells: Experimental Observation and Development of a Microscopic Theory.” In Ultrafast
Phenomena in Semiconductors and Nanostructure Materials XIII, edited by Kong-Thon
Tsen, Jin-Joo Song, Markus Betz, and Abdulhakem Y. Elezzabi, 7214:721404-721404–13.
SPIE Proceedings. SPIE, 2009. https://doi.org/10.1117/12.811841.'
ieee: 'M. Bieler et al., “Generation of injection currents in (110)-oriented
GaAs quantum wells: experimental observation and development of a microscopic
theory,” in Ultrafast Phenomena in Semiconductors and Nanostructure Materials
XIII, San Jose (California / USA), 2009, vol. 7214, pp. 721404-721404–13,
doi: 10.1117/12.811841.'
mla: 'Bieler, M., et al. “Generation of Injection Currents in (110)-Oriented GaAs
Quantum Wells: Experimental Observation and Development of a Microscopic Theory.”
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII,
edited by Kong-Thon Tsen et al., vol. 7214, SPIE, 2009, pp. 721404-721404–13,
doi:10.1117/12.811841.'
short: 'M. Bieler, K. Pierz, U. Siegner, P. Dawson, H.T. Duc, J. Förstner, T. Meier,
in: K.-T. Tsen, J.-J. Song, M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena
in Semiconductors and Nanostructure Materials XIII, SPIE, 2009, pp. 721404-721404–13.'
conference:
location: San Jose (California / USA)
name: 'SPIE OPTO: Integrated Optoelectronic Devices, 2009'
date_created: 2018-08-28T09:35:18Z
date_updated: 2023-04-21T20:01:45Z
department:
- _id: '293'
- _id: '15'
- _id: '170'
- _id: '230'
doi: 10.1117/12.811841
editor:
- first_name: Kong-Thon
full_name: Tsen, Kong-Thon
last_name: Tsen
- first_name: Jin-Joo
full_name: Song, Jin-Joo
last_name: Song
- first_name: Markus
full_name: Betz, Markus
last_name: Betz
- first_name: Abdulhakem Y.
full_name: Elezzabi, Abdulhakem Y.
last_name: Elezzabi
intvolume: ' 7214'
keyword:
- tet_topic_qw
language:
- iso: eng
page: 721404-721404-13
publication: Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII
publication_status: published
publisher: SPIE
series_title: SPIE Proceedings
status: public
title: 'Generation of injection currents in (110)-oriented GaAs quantum wells: experimental
observation and development of a microscopic theory'
type: conference
user_id: '49063'
volume: 7214
year: '2009'
...
---
_id: '44104'
abstract:
- lang: eng
text: The paper presents a theoretical analysis of the nonlinear THz response from
the internal transitions of coherent and incoherent excitons based on the formulated
microscopic THz theory. Moreover, the response of unexcited semiconductors to
extremely intense THz fields is investigated .The intersubband transitions of
optically excited quantum wells using linear THz spectroscopy is also studied.
The computed differential transmission shows a characteristic Fano-like line shape
of the intersubband resonance. The pure intersubband contribution is given by
a simple Lorentzian. Applying the microscopic theory, the Fano features of the
total response can be attributed to the phase-sensitive superposition of the intersubband
transitions and the ponderomotive contribution. These results are in excellent
agreement with recent experiments.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: S.W.
full_name: Koch, S.W.
last_name: Koch
- first_name: M.
full_name: Kira, M.
last_name: Kira
- first_name: J.T.
full_name: Steiner, J.T.
last_name: Steiner
- first_name: D.
full_name: Golde, D.
last_name: Golde
citation:
ama: 'Meier T, Koch SW, Kira M, Steiner JT, Golde D. Microscopic theory of the linear
and nonlinear Terahertz response of semiconductors. In: CLEO/Europe - EQEC
2009 - European Conference on Lasers and Electro-Optics and the European Quantum
Electronics Conference. IEEE; 2009. doi:10.1109/CLEOE-EQEC.2009.5192555'
apa: Meier, T., Koch, S. W., Kira, M., Steiner, J. T., & Golde, D. (2009). Microscopic
theory of the linear and nonlinear Terahertz response of semiconductors. CLEO/Europe
- EQEC 2009 - European Conference on Lasers and Electro-Optics and the European
Quantum Electronics Conference. CLEO/Europe - EQEC 2009 - European Conference
on Lasers and Electro-Optics and the European Quantum Electronics Conference,
Munich, Germany. https://doi.org/10.1109/CLEOE-EQEC.2009.5192555
bibtex: '@inproceedings{Meier_Koch_Kira_Steiner_Golde_2009, title={Microscopic theory
of the linear and nonlinear Terahertz response of semiconductors}, DOI={10.1109/CLEOE-EQEC.2009.5192555},
booktitle={ CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics
and the European Quantum Electronics Conference}, publisher={IEEE}, author={Meier,
Torsten and Koch, S.W. and Kira, M. and Steiner, J.T. and Golde, D.}, year={2009}
}'
chicago: Meier, Torsten, S.W. Koch, M. Kira, J.T. Steiner, and D. Golde. “Microscopic
Theory of the Linear and Nonlinear Terahertz Response of Semiconductors.” In
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and
the European Quantum Electronics Conference. IEEE, 2009. https://doi.org/10.1109/CLEOE-EQEC.2009.5192555.
ieee: 'T. Meier, S. W. Koch, M. Kira, J. T. Steiner, and D. Golde, “Microscopic
theory of the linear and nonlinear Terahertz response of semiconductors,” presented
at the CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics
and the European Quantum Electronics Conference, Munich, Germany, 2009, doi: 10.1109/CLEOE-EQEC.2009.5192555.'
mla: Meier, Torsten, et al. “Microscopic Theory of the Linear and Nonlinear Terahertz
Response of Semiconductors.” CLEO/Europe - EQEC 2009 - European Conference
on Lasers and Electro-Optics and the European Quantum Electronics Conference,
IEEE, 2009, doi:10.1109/CLEOE-EQEC.2009.5192555.
short: 'T. Meier, S.W. Koch, M. Kira, J.T. Steiner, D. Golde, in: CLEO/Europe -
EQEC 2009 - European Conference on Lasers and Electro-Optics and the European
Quantum Electronics Conference, IEEE, 2009.'
conference:
end_date: 2009-06-19
location: Munich, Germany
name: ' CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics
and the European Quantum Electronics Conference'
start_date: 2009-06-14
date_created: 2023-04-21T19:56:14Z
date_updated: 2023-04-21T19:56:17Z
department:
- _id: '293'
doi: 10.1109/CLEOE-EQEC.2009.5192555
language:
- iso: eng
main_file_link:
- url: https://ieeexplore.ieee.org/abstract/document/5192555
publication: ' CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics
and the European Quantum Electronics Conference'
publication_identifier:
isbn:
- 978-1-4244-4079-5
publication_status: published
publisher: IEEE
status: public
title: Microscopic theory of the linear and nonlinear Terahertz response of semiconductors
type: conference
user_id: '49063'
year: '2009'
...
---
_id: '44105'
abstract:
- lang: eng
text: By combining coherent control schemes and photoelectron spectroscopy it is
possible to generate ultrafast current pulses at surfaces and in solids and to
detect their decay directly in momentum space with femtosecond time resolution.
author:
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: S.W.
full_name: Koch, S.W.
last_name: Koch
- first_name: M.
full_name: Rohleder, M.
last_name: Rohleder
- first_name: J.
full_name: Gudde, J.
last_name: Gudde
- first_name: U.
full_name: Hofer, U.
last_name: Hofer
citation:
ama: 'Meier T, Koch SW, Rohleder M, Gudde J, Hofer U. Ultrafast coherent photoelectron
emission effects and their application for time-domain studies of current transport.
In: Conference on Lasers and Electro-Optics and 2009 Conference on Quantum
Electronics and Laser Science Conference. IEEE; 2009:1-2. doi:10.1364/IQEC.2009.IThI5'
apa: Meier, T., Koch, S. W., Rohleder, M., Gudde, J., & Hofer, U. (2009). Ultrafast
coherent photoelectron emission effects and their application for time-domain
studies of current transport. Conference on Lasers and Electro-Optics and 2009
Conference on Quantum Electronics and Laser Science Conference, 1–2. https://doi.org/10.1364/IQEC.2009.IThI5
bibtex: '@inproceedings{Meier_Koch_Rohleder_Gudde_Hofer_2009, title={Ultrafast coherent
photoelectron emission effects and their application for time-domain studies of
current transport}, DOI={10.1364/IQEC.2009.IThI5},
booktitle={Conference on Lasers and Electro-Optics and 2009 Conference on Quantum
electronics and Laser Science Conference}, publisher={IEEE}, author={Meier, Torsten
and Koch, S.W. and Rohleder, M. and Gudde, J. and Hofer, U.}, year={2009}, pages={1–2}
}'
chicago: Meier, Torsten, S.W. Koch, M. Rohleder, J. Gudde, and U. Hofer. “Ultrafast
Coherent Photoelectron Emission Effects and Their Application for Time-Domain
Studies of Current Transport.” In Conference on Lasers and Electro-Optics and
2009 Conference on Quantum Electronics and Laser Science Conference, 1–2.
IEEE, 2009. https://doi.org/10.1364/IQEC.2009.IThI5.
ieee: 'T. Meier, S. W. Koch, M. Rohleder, J. Gudde, and U. Hofer, “Ultrafast coherent
photoelectron emission effects and their application for time-domain studies of
current transport,” in Conference on Lasers and Electro-Optics and 2009 Conference
on Quantum electronics and Laser Science Conference, Baltimore, MD, USA, 2009,
pp. 1–2, doi: 10.1364/IQEC.2009.IThI5.'
mla: Meier, Torsten, et al. “Ultrafast Coherent Photoelectron Emission Effects and
Their Application for Time-Domain Studies of Current Transport.” Conference
on Lasers and Electro-Optics and 2009 Conference on Quantum Electronics and Laser
Science Conference, IEEE, 2009, pp. 1–2, doi:10.1364/IQEC.2009.IThI5.
short: 'T. Meier, S.W. Koch, M. Rohleder, J. Gudde, U. Hofer, in: Conference on
Lasers and Electro-Optics and 2009 Conference on Quantum Electronics and Laser
Science Conference, IEEE, 2009, pp. 1–2.'
conference:
end_date: 2009-06-02
location: Baltimore, MD, USA
name: Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics
and Laser Science Conference
start_date: 2009-06-04
date_created: 2023-04-21T20:00:17Z
date_updated: 2023-04-21T20:00:20Z
department:
- _id: '293'
doi: 10.1364/IQEC.2009.IThI5
language:
- iso: eng
main_file_link:
- url: https://ieeexplore.ieee.org/abstract/document/5225500
page: 1-2
publication: Conference on Lasers and Electro-Optics and 2009 Conference on Quantum
electronics and Laser Science Conference
publication_identifier:
eissn:
- 2160-9004
publication_status: published
publisher: IEEE
status: public
title: Ultrafast coherent photoelectron emission effects and their application for
time-domain studies of current transport
type: conference
user_id: '49063'
year: '2009'
...