---
_id: '4176'
abstract:
- lang: eng
text: A microscopic theory that describes injection currents in GaAs quantum wells
is presented. 14 × 14 band k.p theory is used to compute the band structure including
anisotropy and spin-orbit interaction. Transient injection currents are obtained
via numerical solutions of the semiconductor Bloch equations. Depending on the
growth direction of the considered quantum well system and the propagation and
polarization directions of the incident light beam, it is possible to generate
charge and/or spin photocurrents on ultrashort time scales. The dependence of
the photocurrents on the excitation conditions is computed and discussed.
author:
- first_name: Huynh Thanh
full_name: Duc, Huynh Thanh
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: 'Duc HT, Förstner J, Meier T. Microscopic theoretical analysis of optically
generated injection currents in semiconductor quantum wells. In: Song J-J, Tsen
K-T, Betz M, Elezzabi AY, eds. Ultrafast Phenomena in Semiconductors and Nanostructure
Materials XIV. Vol 7600. SPIE Proceedings. SPIE; 2010:76000S-76000S - 9. doi:10.1117/12.840388'
apa: Duc, H. T., Förstner, J., & Meier, T. (2010). Microscopic theoretical analysis
of optically generated injection currents in semiconductor quantum wells. In J.-J.
Song, K.-T. Tsen, M. Betz, & A. Y. Elezzabi (Eds.), Ultrafast Phenomena
in Semiconductors and Nanostructure Materials XIV (Vol. 7600, pp. 76000S-76000S
– 9). SPIE. https://doi.org/10.1117/12.840388
bibtex: '@inproceedings{Duc_Förstner_Meier_2010, series={SPIE Proceedings}, title={Microscopic
theoretical analysis of optically generated injection currents in semiconductor
quantum wells}, volume={7600}, DOI={10.1117/12.840388},
booktitle={Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV},
publisher={SPIE}, author={Duc, Huynh Thanh and Förstner, Jens and Meier, Torsten},
editor={Song, Jin-Joo and Tsen, Kong-Thon and Betz, Markus and Elezzabi, Abdulhakem
Y.}, year={2010}, pages={76000S-76000S–9}, collection={SPIE Proceedings} }'
chicago: Duc, Huynh Thanh, Jens Förstner, and Torsten Meier. “Microscopic Theoretical
Analysis of Optically Generated Injection Currents in Semiconductor Quantum Wells.”
In Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV,
edited by Jin-Joo Song, Kong-Thon Tsen, Markus Betz, and Abdulhakem Y. Elezzabi,
7600:76000S-76000S – 9. SPIE Proceedings. SPIE, 2010. https://doi.org/10.1117/12.840388.
ieee: 'H. T. Duc, J. Förstner, and T. Meier, “Microscopic theoretical analysis of
optically generated injection currents in semiconductor quantum wells,” in Ultrafast
Phenomena in Semiconductors and Nanostructure Materials XIV, 2010, vol. 7600,
pp. 76000S-76000S–9, doi: 10.1117/12.840388.'
mla: Duc, Huynh Thanh, et al. “Microscopic Theoretical Analysis of Optically Generated
Injection Currents in Semiconductor Quantum Wells.” Ultrafast Phenomena in
Semiconductors and Nanostructure Materials XIV, edited by Jin-Joo Song et
al., vol. 7600, SPIE, 2010, pp. 76000S-76000S – 9, doi:10.1117/12.840388.
short: 'H.T. Duc, J. Förstner, T. Meier, in: J.-J. Song, K.-T. Tsen, M. Betz, A.Y.
Elezzabi (Eds.), Ultrafast Phenomena in Semiconductors and Nanostructure Materials
XIV, SPIE, 2010, pp. 76000S-76000S–9.'
date_created: 2018-08-28T09:00:53Z
date_updated: 2023-04-19T11:07:47Z
department:
- _id: '15'
- _id: '293'
- _id: '170'
- _id: '230'
doi: 10.1117/12.840388
editor:
- first_name: Jin-Joo
full_name: Song, Jin-Joo
last_name: Song
- first_name: Kong-Thon
full_name: Tsen, Kong-Thon
last_name: Tsen
- first_name: Markus
full_name: Betz, Markus
last_name: Betz
- first_name: Abdulhakem Y.
full_name: Elezzabi, Abdulhakem Y.
last_name: Elezzabi
intvolume: ' 7600'
keyword:
- tet_topic_qw
language:
- iso: eng
page: 76000S-76000S-9
publication: Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV
publication_status: published
publisher: SPIE
series_title: SPIE Proceedings
status: public
title: Microscopic theoretical analysis of optically generated injection currents
in semiconductor quantum wells
type: conference
user_id: '49063'
volume: 7600
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: '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: '4180'
abstract:
- lang: eng
text: We show that an optically driven carrier spin undergoes indirect dephasing
even in the absence of spin-reservoir coupling and illustrate it for phonon-induced
decoherence during optical spin rotation in a single quantum dot.
article_number: NMA1
author:
- first_name: Anna
full_name: Grodecka, Anna
last_name: Grodecka
- first_name: Pawel
full_name: Machnikowski, Pawel
last_name: Machnikowski
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Grodecka A, Machnikowski P, Förstner J. Indirect Dephasing Channel for Optically
Controlled Spin in a Single Quantum Dot. In: Advances in Optical Sciences Congress.
OSA Technical Digest (CD) (Optical Society of America, 2009); 2009. doi:10.1364/nlo.2009.nma1'
apa: Grodecka, A., Machnikowski, P., & Förstner, J. (2009). Indirect Dephasing
Channel for Optically Controlled Spin in a Single Quantum Dot. In Advances
in Optical Sciences Congress. OSA Technical Digest (CD) (Optical Society of
America, 2009). https://doi.org/10.1364/nlo.2009.nma1
bibtex: '@inproceedings{Grodecka_Machnikowski_Förstner_2009, title={Indirect Dephasing
Channel for Optically Controlled Spin in a Single Quantum Dot}, DOI={10.1364/nlo.2009.nma1},
number={NMA1}, booktitle={Advances in Optical Sciences Congress}, publisher={OSA
Technical Digest (CD) (Optical Society of America, 2009)}, author={Grodecka, Anna
and Machnikowski, Pawel and Förstner, Jens}, year={2009} }'
chicago: Grodecka, Anna, Pawel Machnikowski, and Jens Förstner. “Indirect Dephasing
Channel for Optically Controlled Spin in a Single Quantum Dot.” In Advances
in Optical Sciences Congress. OSA Technical Digest (CD) (Optical Society of
America, 2009), 2009. https://doi.org/10.1364/nlo.2009.nma1.
ieee: A. Grodecka, P. Machnikowski, and J. Förstner, “Indirect Dephasing Channel
for Optically Controlled Spin in a Single Quantum Dot,” in Advances in Optical
Sciences Congress, 2009.
mla: Grodecka, Anna, et al. “Indirect Dephasing Channel for Optically Controlled
Spin in a Single Quantum Dot.” Advances in Optical Sciences Congress, NMA1,
OSA Technical Digest (CD) (Optical Society of America, 2009), 2009, doi:10.1364/nlo.2009.nma1.
short: 'A. Grodecka, P. Machnikowski, J. Förstner, in: Advances in Optical Sciences
Congress, OSA Technical Digest (CD) (Optical Society of America, 2009), 2009.'
date_created: 2018-08-28T09:22:42Z
date_updated: 2022-01-06T07:00:30Z
doi: 10.1364/nlo.2009.nma1
keyword:
- tet_topic_qd
language:
- iso: eng
publication: Advances in Optical Sciences Congress
publication_identifier:
isbn:
- '9781557528735'
publication_status: published
publisher: OSA Technical Digest (CD) (Optical Society of America, 2009)
status: public
title: Indirect Dephasing Channel for Optically Controlled Spin in a Single Quantum
Dot
type: conference
user_id: '55706'
year: '2009'
...
---
_id: '4182'
abstract:
- lang: eng
text: "We demonstrate that an optically driven spin of a carrier in a quantum dot
undergoes indirect dephasing via\r\nconditional optically induced charge evolution
even in the absence of any direct interaction between the spin\r\nand its environment.
A generic model for the indirect dephasing with a three-component system with
spin,\r\ncharge, and reservoir is proposed. This indirect decoherence channel
is studied for the optical spin manipulation\r\nin a quantum dot with a microscopic
description of the charge-phonon interaction taking into account its\r\nnon-Markovian
nature."
article_number: '042331'
article_type: original
author:
- first_name: A.
full_name: Grodecka, A.
last_name: Grodecka
- first_name: P.
full_name: Machnikowski, P.
last_name: Machnikowski
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Grodecka A, Machnikowski P, Förstner J. Indirect spin dephasing via charge-state
decoherence in optical control schemes in quantum dots. Physical Review A.
2009;79(4). doi:10.1103/physreva.79.042331
apa: Grodecka, A., Machnikowski, P., & Förstner, J. (2009). Indirect spin dephasing
via charge-state decoherence in optical control schemes in quantum dots. Physical
Review A, 79(4). https://doi.org/10.1103/physreva.79.042331
bibtex: '@article{Grodecka_Machnikowski_Förstner_2009, title={Indirect spin dephasing
via charge-state decoherence in optical control schemes in quantum dots}, volume={79},
DOI={10.1103/physreva.79.042331},
number={4042331}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Grodecka, A. and Machnikowski, P. and Förstner, Jens}, year={2009}
}'
chicago: Grodecka, A., P. Machnikowski, and Jens Förstner. “Indirect Spin Dephasing
via Charge-State Decoherence in Optical Control Schemes in Quantum Dots.” Physical
Review A 79, no. 4 (2009). https://doi.org/10.1103/physreva.79.042331.
ieee: A. Grodecka, P. Machnikowski, and J. Förstner, “Indirect spin dephasing via
charge-state decoherence in optical control schemes in quantum dots,” Physical
Review A, vol. 79, no. 4, 2009.
mla: Grodecka, A., et al. “Indirect Spin Dephasing via Charge-State Decoherence
in Optical Control Schemes in Quantum Dots.” Physical Review A, vol. 79,
no. 4, 042331, American Physical Society (APS), 2009, doi:10.1103/physreva.79.042331.
short: A. Grodecka, P. Machnikowski, J. Förstner, Physical Review A 79 (2009).
date_created: 2018-08-28T09:32:32Z
date_updated: 2022-01-06T07:00:31Z
ddc:
- '530'
department:
- _id: '15'
doi: 10.1103/physreva.79.042331
file:
- access_level: open_access
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-28T09:33:22Z
date_updated: 2018-09-04T19:36:35Z
file_id: '4183'
file_name: 2009 Grodecka,Machnikowski,Förstner_Indirect spin dephasing via charge-state
decoherence in optical control schemes in quantum dots.pdf
file_size: 192120
relation: main_file
file_date_updated: 2018-09-04T19:36:35Z
has_accepted_license: '1'
intvolume: ' 79'
issue: '4'
keyword:
- tet_topic_qd
language:
- iso: eng
oa: '1'
publication: Physical Review A
publication_identifier:
issn:
- 1050-2947
- 1094-1622
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Indirect spin dephasing via charge-state decoherence in optical control schemes
in quantum dots
type: journal_article
urn: '41826'
user_id: '158'
volume: 79
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: '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: '4181'
abstract:
- lang: eng
text: We experimentally and theoretically investigate microdisk resonators with
embedded quantum dots immersed in a liquid crystal in its nematic phase, showing
the tunabililty of the photonic modes via external parameters like temperature
or electric field.
article_number: paper NTuC2
author:
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
- first_name: Karoline
full_name: Piegdon, Karoline
last_name: Piegdon
- first_name: Stefan
full_name: Declair, Stefan
last_name: Declair
- first_name: Andreas
full_name: Hoischen, Andreas
last_name: Hoischen
- first_name: Mark
full_name: Urbanski, Mark
last_name: Urbanski
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Heinz-Siegfried
full_name: Kitzerow, Heinz-Siegfried
id: '254'
last_name: Kitzerow
citation:
ama: 'Förstner J, Meier C, Piegdon K, et al. Coupling Dynamics of Quantum Dots in
a Liquid-Crystal-Tunable Microdisk Resonator. In: Advances in Optical Sciences
Congress. OSA Technical Digest (CD) (Optical Society of America, 2009), paper
NTuC2; 2009. doi:10.1364/nlo.2009.ntuc2'
apa: 'Förstner, J., Meier, C., Piegdon, K., Declair, S., Hoischen, A., Urbanski,
M., Meier, T., & Kitzerow, H.-S. (2009). Coupling Dynamics of Quantum Dots
in a Liquid-Crystal-Tunable Microdisk Resonator. Advances in Optical Sciences
Congress, Article paper NTuC2. Nonlinear Optics: Materials, Fundamentals and
Applications 2009, Honolulu, Hawaii United States. https://doi.org/10.1364/nlo.2009.ntuc2'
bibtex: '@inproceedings{Förstner_Meier_Piegdon_Declair_Hoischen_Urbanski_Meier_Kitzerow_2009,
title={Coupling Dynamics of Quantum Dots in a Liquid-Crystal-Tunable Microdisk
Resonator}, DOI={10.1364/nlo.2009.ntuc2},
number={paper NTuC2}, booktitle={Advances in Optical Sciences Congress}, publisher={OSA
Technical Digest (CD) (Optical Society of America, 2009), paper NTuC2}, author={Förstner,
Jens and Meier, Cedrik and Piegdon, Karoline and Declair, Stefan and Hoischen,
Andreas and Urbanski, Mark and Meier, Torsten and Kitzerow, Heinz-Siegfried},
year={2009} }'
chicago: Förstner, Jens, Cedrik Meier, Karoline Piegdon, Stefan Declair, Andreas
Hoischen, Mark Urbanski, Torsten Meier, and Heinz-Siegfried Kitzerow. “Coupling
Dynamics of Quantum Dots in a Liquid-Crystal-Tunable Microdisk Resonator.” In
Advances in Optical Sciences Congress. OSA Technical Digest (CD) (Optical
Society of America, 2009), paper NTuC2, 2009. https://doi.org/10.1364/nlo.2009.ntuc2.
ieee: 'J. Förstner et al., “Coupling Dynamics of Quantum Dots in a Liquid-Crystal-Tunable
Microdisk Resonator,” presented at the Nonlinear Optics: Materials, Fundamentals
and Applications 2009, Honolulu, Hawaii United States, 2009, doi: 10.1364/nlo.2009.ntuc2.'
mla: Förstner, Jens, et al. “Coupling Dynamics of Quantum Dots in a Liquid-Crystal-Tunable
Microdisk Resonator.” Advances in Optical Sciences Congress, paper NTuC2,
OSA Technical Digest (CD) (Optical Society of America, 2009), paper NTuC2, 2009,
doi:10.1364/nlo.2009.ntuc2.
short: 'J. Förstner, C. Meier, K. Piegdon, S. Declair, A. Hoischen, M. Urbanski,
T. Meier, H.-S. Kitzerow, in: Advances in Optical Sciences Congress, OSA Technical
Digest (CD) (Optical Society of America, 2009), paper NTuC2, 2009.'
conference:
end_date: 2009-07-17
location: Honolulu, Hawaii United States
name: 'Nonlinear Optics: Materials, Fundamentals and Applications 2009'
start_date: 2009-07-11
date_created: 2018-08-28T09:28:38Z
date_updated: 2025-12-16T16:41:31Z
department:
- _id: '15'
- _id: '287'
- _id: '293'
- _id: '230'
- _id: '35'
- _id: '313'
- _id: '170'
- _id: '35'
- _id: '34'
- _id: '61'
doi: 10.1364/nlo.2009.ntuc2
keyword:
- tet_topic_microdisk
language:
- iso: eng
publication: Advances in Optical Sciences Congress
publication_identifier:
isbn:
- '9781557528735'
publication_status: published
publisher: OSA Technical Digest (CD) (Optical Society of America, 2009), paper NTuC2
status: public
title: Coupling Dynamics of Quantum Dots in a Liquid-Crystal-Tunable Microdisk Resonator
type: conference
user_id: '16199'
year: '2009'
...
---
_id: '4187'
abstract:
- lang: eng
text: "We study phonon-assisted electron tunneling in semiconductor quantum dot
molecules. In particular, singletsinglet\r\nrelaxation in a two-electron-doped
structure is considered. The influence of Coulomb interaction is\r\ndiscussed
via comparison with a single-electron system. We find that the relaxation rate
reaches similar values\r\nin the two cases but the Coulomb interaction shifts
the maximum rates toward larger separations between the\r\ndots. The difference
in electron-phonon interaction between deformation potential and piezoelectric
coupling is\r\ninvestigated. We show that the phonon-induced tunneling between
two-electron singlet states is a fast process,\r\ntaking place on the time scales
of the order of a few tens of picoseconds."
article_number: '085302'
article_type: original
author:
- first_name: A.
full_name: Grodecka, A.
last_name: Grodecka
- first_name: P.
full_name: Machnikowski, P.
last_name: Machnikowski
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Grodecka A, Machnikowski P, Förstner J. Phonon-assisted tunneling between singlet
states in two-electron quantum dot molecules. Physical Review B. 2008;78(8).
doi:10.1103/physrevb.78.085302
apa: Grodecka, A., Machnikowski, P., & Förstner, J. (2008). Phonon-assisted
tunneling between singlet states in two-electron quantum dot molecules. Physical
Review B, 78(8). https://doi.org/10.1103/physrevb.78.085302
bibtex: '@article{Grodecka_Machnikowski_Förstner_2008, title={Phonon-assisted tunneling
between singlet states in two-electron quantum dot molecules}, volume={78}, DOI={10.1103/physrevb.78.085302},
number={8085302}, journal={Physical Review B}, publisher={American Physical Society
(APS)}, author={Grodecka, A. and Machnikowski, P. and Förstner, Jens}, year={2008}
}'
chicago: Grodecka, A., P. Machnikowski, and Jens Förstner. “Phonon-Assisted Tunneling
between Singlet States in Two-Electron Quantum Dot Molecules.” Physical Review
B 78, no. 8 (2008). https://doi.org/10.1103/physrevb.78.085302.
ieee: A. Grodecka, P. Machnikowski, and J. Förstner, “Phonon-assisted tunneling
between singlet states in two-electron quantum dot molecules,” Physical Review
B, vol. 78, no. 8, 2008.
mla: Grodecka, A., et al. “Phonon-Assisted Tunneling between Singlet States in Two-Electron
Quantum Dot Molecules.” Physical Review B, vol. 78, no. 8, 085302, American
Physical Society (APS), 2008, doi:10.1103/physrevb.78.085302.
short: A. Grodecka, P. Machnikowski, J. Förstner, Physical Review B 78 (2008).
date_created: 2018-08-28T10:21:47Z
date_updated: 2022-01-06T07:00:31Z
ddc:
- '530'
department:
- _id: '15'
doi: 10.1103/physrevb.78.085302
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-28T10:22:35Z
date_updated: 2018-08-28T10:22:35Z
file_id: '4188'
file_name: 2008 Grodecka,Machnikowski,Förstner_Phonon-assisted tunneling between
singlet states in two-electron quantum dot molecules.pdf
file_size: 2536294
relation: main_file
success: 1
file_date_updated: 2018-08-28T10:22:35Z
has_accepted_license: '1'
intvolume: ' 78'
issue: '8'
keyword:
- tet_topic_qd
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: Phonon-assisted tunneling between singlet states in two-electron quantum dot
molecules
type: journal_article
user_id: '55706'
volume: 78
year: '2008'
...
---
_id: '4256'
abstract:
- lang: eng
text: "We present phase-resolved pulse propagation measurements that allow us to
fully describe the transition\r\nbetween several light–matter interaction regimes.
The complete range from linear excitation to the breakdown\r\nof the photonic
bandgap on to self-induced transmission and self-phase modulation is studied on
a\r\nhigh-quality multiple-quantum-well Bragg structure. An improved fast-scanning
cross-correlation\r\nfrequency-resolved optical gating setup is applied to retrieve
the pulse phase with an excellent signal-tonoise\r\nratio. Calculations using
the semiconductor Maxwell–Bloch equations show qualitative agreement\r\nwith the
experimental findings. "
article_number: '1384'
article_type: original
author:
- first_name: Tilman Höner
full_name: zu Siederdissen, Tilman Höner
last_name: zu Siederdissen
- first_name: Nils C.
full_name: Nielsen, Nils C.
last_name: Nielsen
- first_name: Jürgen
full_name: Kuhl, Jürgen
last_name: Kuhl
- first_name: Martin
full_name: Schaarschmidt, Martin
last_name: Schaarschmidt
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Andreas
full_name: Knorr, Andreas
last_name: Knorr
- first_name: Galina
full_name: Khitrova, Galina
last_name: Khitrova
- first_name: Hyatt M.
full_name: Gibbs, Hyatt M.
last_name: Gibbs
- first_name: Stephan W.
full_name: Koch, Stephan W.
last_name: Koch
- first_name: Harald
full_name: Giessen, Harald
last_name: Giessen
citation:
ama: zu Siederdissen TH, Nielsen NC, Kuhl J, et al. Transition between different
coherent light–matter interaction regimes analyzed by phase-resolved pulse propagation.
Optics Letters. 2008;30(11). doi:10.1364/ol.30.001384
apa: zu Siederdissen, T. H., Nielsen, N. C., Kuhl, J., Schaarschmidt, M., Förstner,
J., Knorr, A., … Giessen, H. (2008). Transition between different coherent light–matter
interaction regimes analyzed by phase-resolved pulse propagation. Optics Letters,
30(11). https://doi.org/10.1364/ol.30.001384
bibtex: '@article{zu Siederdissen_Nielsen_Kuhl_Schaarschmidt_Förstner_Knorr_Khitrova_Gibbs_Koch_Giessen_2008,
title={Transition between different coherent light–matter interaction regimes
analyzed by phase-resolved pulse propagation}, volume={30}, DOI={10.1364/ol.30.001384},
number={111384}, journal={Optics Letters}, publisher={The Optical Society}, author={zu
Siederdissen, Tilman Höner and Nielsen, Nils C. and Kuhl, Jürgen and Schaarschmidt,
Martin and Förstner, Jens and Knorr, Andreas and Khitrova, Galina and Gibbs, Hyatt
M. and Koch, Stephan W. and Giessen, Harald}, year={2008} }'
chicago: Siederdissen, Tilman Höner zu, Nils C. Nielsen, Jürgen Kuhl, Martin Schaarschmidt,
Jens Förstner, Andreas Knorr, Galina Khitrova, Hyatt M. Gibbs, Stephan W. Koch,
and Harald Giessen. “Transition between Different Coherent Light–Matter Interaction
Regimes Analyzed by Phase-Resolved Pulse Propagation.” Optics Letters 30,
no. 11 (2008). https://doi.org/10.1364/ol.30.001384.
ieee: T. H. zu Siederdissen et al., “Transition between different coherent
light–matter interaction regimes analyzed by phase-resolved pulse propagation,”
Optics Letters, vol. 30, no. 11, 2008.
mla: zu Siederdissen, Tilman Höner, et al. “Transition between Different Coherent
Light–Matter Interaction Regimes Analyzed by Phase-Resolved Pulse Propagation.”
Optics Letters, vol. 30, no. 11, 1384, The Optical Society, 2008, doi:10.1364/ol.30.001384.
short: T.H. zu Siederdissen, N.C. Nielsen, J. Kuhl, M. Schaarschmidt, J. Förstner,
A. Knorr, G. Khitrova, H.M. Gibbs, S.W. Koch, H. Giessen, Optics Letters 30 (2008).
date_created: 2018-08-29T09:12:59Z
date_updated: 2022-01-06T07:00:43Z
ddc:
- '530'
doi: 10.1364/ol.30.001384
extern: '1'
file:
- access_level: open_access
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-29T09:13:36Z
date_updated: 2018-09-04T20:01:11Z
file_id: '4257'
file_name: 2005 Siederdissen et al_Transition between different coherent light–matter
interaction regimes analyzed by phase-resolved pulse propagation.pdf
file_size: 125355
relation: main_file
file_date_updated: 2018-09-04T20:01:11Z
has_accepted_license: '1'
intvolume: ' 30'
issue: '11'
keyword:
- tet_topic_polariton
- tet_topic_qw
language:
- iso: eng
oa: '1'
publication: Optics Letters
publication_identifier:
issn:
- 0146-9592
- 1539-4794
publication_status: published
publisher: The Optical Society
status: public
title: Transition between different coherent light–matter interaction regimes analyzed
by phase-resolved pulse propagation
type: journal_article
urn: '42568'
user_id: '158'
volume: 30
year: '2008'
...
---
_id: '4317'
abstract:
- lang: eng
text: Phonon-assisted singlet-singlet relaxation in semiconductor quantum dot molecules
is studied theoretically. Laterally coupled quantum dot structures doped with
two electrons are considered. We take into account interaction with acoustic phonon
modes via deformation potential and piezoelectric coupling. We show that piezoelectric
mechanism for the considered system is of great importance and for some ranges
of quantum dot molecule parameters is the dominant contribution to relaxation.
It is shown that the phonon-assisted tunneling is much faster (down to ∼ 6 ps
even at zero temperature) in comparison with other decoherence processes. The
influence of Coulomb interaction is discussed and its consequences are indicated.
We calculate the relaxation rates for GaAs quantum dot molecules and study the
dependence on quantum dot size, distance and offset between the constituent quantum
dots. In addition the temperature dependence of the tunneling rates is analyzed.
article_type: original
author:
- first_name: Anna
full_name: Grodecka, Anna
last_name: Grodecka
- first_name: Paweł
full_name: Machnikowski, Paweł
last_name: Machnikowski
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Grodecka A, Machnikowski P, Förstner J. Theoretical study of phononassisted
singlet-singlet relaxation in two-electron semiconductor quantum dot molecules.
physica status solidi (c). 2008;6(2):474-478. doi:10.1002/pssc.200880319
apa: Grodecka, A., Machnikowski, P., & Förstner, J. (2008). Theoretical study
of phononassisted singlet-singlet relaxation in two-electron semiconductor quantum
dot molecules. Physica Status Solidi (C), 6(2), 474–478. https://doi.org/10.1002/pssc.200880319
bibtex: '@article{Grodecka_Machnikowski_Förstner_2008, title={Theoretical study
of phononassisted singlet-singlet relaxation in two-electron semiconductor quantum
dot molecules}, volume={6}, DOI={10.1002/pssc.200880319},
number={2}, journal={physica status solidi (c)}, publisher={Wiley}, author={Grodecka,
Anna and Machnikowski, Paweł and Förstner, Jens}, year={2008}, pages={474–478}
}'
chicago: 'Grodecka, Anna, Paweł Machnikowski, and Jens Förstner. “Theoretical Study
of Phononassisted Singlet-Singlet Relaxation in Two-Electron Semiconductor Quantum
Dot Molecules.” Physica Status Solidi (C) 6, no. 2 (2008): 474–78. https://doi.org/10.1002/pssc.200880319.'
ieee: A. Grodecka, P. Machnikowski, and J. Förstner, “Theoretical study of phononassisted
singlet-singlet relaxation in two-electron semiconductor quantum dot molecules,”
physica status solidi (c), vol. 6, no. 2, pp. 474–478, 2008.
mla: Grodecka, Anna, et al. “Theoretical Study of Phononassisted Singlet-Singlet
Relaxation in Two-Electron Semiconductor Quantum Dot Molecules.” Physica Status
Solidi (C), vol. 6, no. 2, Wiley, 2008, pp. 474–78, doi:10.1002/pssc.200880319.
short: A. Grodecka, P. Machnikowski, J. Förstner, Physica Status Solidi (C) 6 (2008)
474–478.
date_created: 2018-08-30T09:45:39Z
date_updated: 2022-01-06T07:00:54Z
ddc:
- '530'
department:
- _id: '15'
doi: 10.1002/pssc.200880319
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-30T09:46:20Z
date_updated: 2018-08-30T09:46:20Z
file_id: '4318'
file_name: 2009 Grodecka-Grad,Machnikowski,Förstner_Theoretical study of phonon-assisted
singlet-singlet relaxation in two-electron semiconductor quantum dot molecules.pdf
file_size: 1103973
relation: main_file
success: 1
file_date_updated: 2018-08-30T09:46:20Z
has_accepted_license: '1'
intvolume: ' 6'
issue: '2'
keyword:
- tet_topic_qd
language:
- iso: eng
page: 474-478
publication: physica status solidi (c)
publication_identifier:
issn:
- 1610-1634
- 1610-1642
publication_status: published
publisher: Wiley
status: public
title: Theoretical study of phononassisted singlet-singlet relaxation in two-electron
semiconductor quantum dot molecules
type: journal_article
user_id: '158'
volume: 6
year: '2008'
...
---
_id: '4303'
abstract:
- lang: eng
text: "The interaction of strong low-area pulses with two-level systems shows absorption
line narrowing and hole\r\nburning within the homogeneous linewidth as a result
of nonlinear wave mixing. The wave mixing results\r\nfrom the two-level electronic
saturation nonlinearity and occurs, depending on the sign of the pulse area,\r\nas
a strong absorption enhancement or gain at the transition frequency of the two-level
system for resonant\r\nexcitation."
article_number: '1830'
article_type: original
author:
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: A.
full_name: Knorr, A.
last_name: Knorr
- first_name: M.
full_name: Lindberg, M.
last_name: Lindberg
- first_name: S. W.
full_name: Koch, S. W.
last_name: Koch
citation:
ama: Förstner J, Knorr A, Lindberg M, Koch SW. Line narrowing and hole burning within
the homogeneous linewidth: a new wave-mixing effect in two-level systems. Optics
Letters. 2007;27(20). doi:10.1364/ol.27.001830
apa: Förstner, J., Knorr, A., Lindberg, M., & Koch, S. W. (2007). Line narrowing
and hole burning within the homogeneous linewidth: a new wave-mixing effect in
two-level systems. Optics Letters, 27(20). https://doi.org/10.1364/ol.27.001830
bibtex: '@article{Förstner_Knorr_Lindberg_Koch_2007, title={Line narrowing and hole
burning within the homogeneous linewidth: a new wave-mixing effect in two-level
systems}, volume={27}, DOI={10.1364/ol.27.001830},
number={201830}, journal={Optics Letters}, publisher={The Optical Society}, author={Förstner,
Jens and Knorr, A. and Lindberg, M. and Koch, S. W.}, year={2007} }'
chicago: Förstner, Jens, A. Knorr, M. Lindberg, and S. W. Koch. “Line Narrowing
and Hole Burning within the Homogeneous Linewidth: A New Wave-Mixing Effect in
Two-Level Systems.” Optics Letters 27, no. 20 (2007). https://doi.org/10.1364/ol.27.001830.
ieee: J. Förstner, A. Knorr, M. Lindberg, and S. W. Koch, “Line narrowing and hole
burning within the homogeneous linewidth: a new wave-mixing effect in two-level
systems,” Optics Letters, vol. 27, no. 20, 2007.
mla: Förstner, Jens, et al. “Line Narrowing and Hole Burning within the Homogeneous
Linewidth: A New Wave-Mixing Effect in Two-Level Systems.” Optics Letters,
vol. 27, no. 20, 1830, The Optical Society, 2007, doi:10.1364/ol.27.001830.
short: J. Förstner, A. Knorr, M. Lindberg, S.W. Koch, Optics Letters 27 (2007).
date_created: 2018-08-30T08:37:34Z
date_updated: 2022-01-06T07:00:51Z
ddc:
- '530'
doi: 10.1364/ol.27.001830
extern: '1'
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-30T08:38:34Z
date_updated: 2018-08-30T08:38:34Z
file_id: '4304'
file_name: 2002 Förstner,Knorr,Lindberg,Koch_Line narrowing and hole burning within
the homogeneous linewidth - A new wave-mixing effect in two-level systems.pdf
file_size: 86420
relation: main_file
success: 1
file_date_updated: 2018-08-30T08:38:34Z
has_accepted_license: '1'
intvolume: ' 27'
issue: '20'
keyword:
- tet_topic_polariton
language:
- iso: eng
publication: Optics Letters
publication_identifier:
issn:
- 0146-9592
- 1539-4794
publication_status: published
publisher: The Optical Society
status: public
title: Line narrowing and hole burning within the homogeneous linewidth: a new wave-mixing
effect in two-level systems
type: journal_article
user_id: '55706'
volume: 27
year: '2007'
...
---
_id: '4189'
abstract:
- lang: eng
text: We theoretically study the biexciton-phonon interaction in strongly confined
semiconductor quantum dots. For spectrally narrow single-pulse excitation generation
of biexcitonic occupations is only possible via a two-photon cascade, which exhibits
renormalized Rabi oscillations and spectrally compressed phononsidebands.
article_type: original
author:
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: A.
full_name: Knorr, A.
last_name: Knorr
- first_name: J. V.
full_name: Moloney, J. V.
last_name: Moloney
citation:
ama: Förstner J, Knorr A, Moloney JV. Interplay of electron-phonon and Coulomb interaction
in semiconductor quantum dots. physica status solidi (c). 2006;3(7):2389-2392.
doi:10.1002/pssc.200668111
apa: Förstner, J., Knorr, A., & Moloney, J. V. (2006). Interplay of electron-phonon
and Coulomb interaction in semiconductor quantum dots. Physica Status Solidi
(C), 3(7), 2389–2392. https://doi.org/10.1002/pssc.200668111
bibtex: '@article{Förstner_Knorr_Moloney_2006, title={Interplay of electron-phonon
and Coulomb interaction in semiconductor quantum dots}, volume={3}, DOI={10.1002/pssc.200668111},
number={7}, journal={physica status solidi (c)}, publisher={Wiley}, author={Förstner,
Jens and Knorr, A. and Moloney, J. V.}, year={2006}, pages={2389–2392} }'
chicago: 'Förstner, Jens, A. Knorr, and J. V. Moloney. “Interplay of Electron-Phonon
and Coulomb Interaction in Semiconductor Quantum Dots.” Physica Status Solidi
(C) 3, no. 7 (2006): 2389–92. https://doi.org/10.1002/pssc.200668111.'
ieee: J. Förstner, A. Knorr, and J. V. Moloney, “Interplay of electron-phonon and
Coulomb interaction in semiconductor quantum dots,” physica status solidi (c),
vol. 3, no. 7, pp. 2389–2392, 2006.
mla: Förstner, Jens, et al. “Interplay of Electron-Phonon and Coulomb Interaction
in Semiconductor Quantum Dots.” Physica Status Solidi (C), vol. 3, no.
7, Wiley, 2006, pp. 2389–92, doi:10.1002/pssc.200668111.
short: J. Förstner, A. Knorr, J.V. Moloney, Physica Status Solidi (C) 3 (2006) 2389–2392.
date_created: 2018-08-28T10:25:14Z
date_updated: 2022-01-06T07:00:32Z
ddc:
- '530'
doi: 10.1002/pssc.200668111
extern: '1'
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-28T10:25:57Z
date_updated: 2018-08-28T10:25:57Z
file_id: '4190'
file_name: 2006 Förstner,Knorr,Moloney_Interplay of electron-phonon and Coulomb
interaction in semiconductor quantum dots..pdf
file_size: 1166894
relation: main_file
success: 1
file_date_updated: 2018-08-28T10:25:57Z
has_accepted_license: '1'
intvolume: ' 3'
issue: '7'
keyword:
- tet_topic_qd
language:
- iso: eng
page: 2389-2392
publication: physica status solidi (c)
publication_identifier:
issn:
- 1610-1634
- 1610-1642
publication_status: published
publisher: Wiley
status: public
title: Interplay of electron-phonon and Coulomb interaction in semiconductor quantum
dots
type: journal_article
user_id: '55706'
volume: 3
year: '2006'
...
---
_id: '4241'
abstract:
- lang: eng
text: We discuss second-harmonic generation experiments on planar arrays of magnetic
split-ring resonators, using 150 fs pulses at 1.5 mum wavelength. Lithographic
tuning reveals by far the largest signals when exciting the magnetic-dipole resonance.
article_number: QThE3
author:
- first_name: M. W.
full_name: Klein, M. W.
last_name: Klein
- first_name: C.
full_name: Enkrich, C.
last_name: Enkrich
- first_name: M.
full_name: Wegener, M.
last_name: Wegener
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: J. V.
full_name: Moloney, J. V.
last_name: Moloney
- first_name: W.
full_name: Hoyer, W.
last_name: Hoyer
- first_name: T.
full_name: Stroucken, T.
last_name: Stroucken
- 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: S.
full_name: Linden, S.
last_name: Linden
citation:
ama: 'Klein MW, Enkrich C, Wegener M, et al. Optical experiments on second-harmonic
generation from metamaterials consisting of split-ring resonators. In: 2006
Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser
Science Conference. IEEE; 2006. doi:10.1109/cleo.2006.4629006'
apa: 'Klein, M. W., Enkrich, C., Wegener, M., Förstner, J., Moloney, J. V., Hoyer,
W., … Linden, S. (2006). Optical experiments on second-harmonic generation from
metamaterials consisting of split-ring resonators. In 2006 Conference on Lasers
and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference.
Long Beach, CA (USA): IEEE. https://doi.org/10.1109/cleo.2006.4629006'
bibtex: '@inproceedings{Klein_Enkrich_Wegener_Förstner_Moloney_Hoyer_Stroucken_Meier_Koch_Linden_2006,
title={Optical experiments on second-harmonic generation from metamaterials consisting
of split-ring resonators}, DOI={10.1109/cleo.2006.4629006},
number={QThE3}, booktitle={2006 Conference on Lasers and Electro-Optics and 2006
Quantum Electronics and Laser Science Conference}, publisher={IEEE}, author={Klein,
M. W. and Enkrich, C. and Wegener, M. and Förstner, Jens and Moloney, J. V. and
Hoyer, W. and Stroucken, T. and Meier, Torsten and Koch, S. W. and Linden, S.},
year={2006} }'
chicago: Klein, M. W., C. Enkrich, M. Wegener, Jens Förstner, J. V. Moloney, W.
Hoyer, T. Stroucken, Torsten Meier, S. W. Koch, and S. Linden. “Optical Experiments
on Second-Harmonic Generation from Metamaterials Consisting of Split-Ring Resonators.”
In 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics
and Laser Science Conference. IEEE, 2006. https://doi.org/10.1109/cleo.2006.4629006.
ieee: M. W. Klein et al., “Optical experiments on second-harmonic generation
from metamaterials consisting of split-ring resonators,” in 2006 Conference
on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference,
Long Beach, CA (USA), 2006.
mla: Klein, M. W., et al. “Optical Experiments on Second-Harmonic Generation from
Metamaterials Consisting of Split-Ring Resonators.” 2006 Conference on Lasers
and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference,
QThE3, IEEE, 2006, doi:10.1109/cleo.2006.4629006.
short: 'M.W. Klein, C. Enkrich, M. Wegener, J. Förstner, J.V. Moloney, W. Hoyer,
T. Stroucken, T. Meier, S.W. Koch, S. Linden, in: 2006 Conference on Lasers and
Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, IEEE,
2006.'
conference:
end_date: 2006-05-26
location: Long Beach, CA (USA)
name: Quantum Electronics and Laser Science Conference
start_date: 2006-05-21
date_created: 2018-08-29T08:24:41Z
date_updated: 2022-01-06T07:00:40Z
ddc:
- '530'
doi: 10.1109/cleo.2006.4629006
extern: '1'
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-29T08:28:36Z
date_updated: 2018-08-29T08:28:36Z
file_id: '4242'
file_name: 2006 Klein et all_Optical Experiments on Second-Harmonic Generation from
Metamaterials Consisting of Split-Ring Resonators.pdf
file_size: 585441
relation: main_file
success: 1
file_date_updated: 2018-08-29T08:28:36Z
has_accepted_license: '1'
keyword:
- tet_topic_meta
language:
- iso: eng
publication: 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics
and Laser Science Conference
publication_identifier:
eissn:
- '2160-9004 '
isbn:
- '9781557528131'
publication_status: published
publisher: IEEE
status: public
title: Optical experiments on second-harmonic generation from metamaterials consisting
of split-ring resonators
type: conference
user_id: '55706'
year: '2006'
...
---
_id: '4243'
abstract:
- lang: eng
text: We investigate the optical properties of a Coulomb-coupled double-quantum
dot system excited by coherent light pulses. Basic effects of Coulomb coupling
regarding linear and nonlinear optical processes are discussed. By numerically
solving the Heisenberg equation of motion we are able to present the temporal
evolution of the system’s density matrix for a wide range of coupling parameters.
The two main coupling effects in dipole approximation, biexcitonic shift and Förster
energy transfer, are investigated and their qualitative and quantitative influence
on absorption spectra, Rabi oscillations, and single- and two-pulse excitation
is discussed. We present simulated differential transmission spectra to allow
for comparison with recent experimental studies.
article_type: original
author:
- first_name: J.
full_name: Danckwerts, J.
last_name: Danckwerts
- first_name: K. J.
full_name: Ahn, K. J.
last_name: Ahn
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: A.
full_name: Knorr, A.
last_name: Knorr
citation:
ama: 'Danckwerts J, Ahn KJ, Förstner J, Knorr A. Theory of ultrafast nonlinear optics
of Coulomb-coupled semiconductor quantum dots: Rabi oscillations and pump-probe
spectra. Physical Review B. 2006;73(16):165318-165318-18. doi:10.1103/physrevb.73.165318'
apa: 'Danckwerts, J., Ahn, K. J., Förstner, J., & Knorr, A. (2006). Theory of
ultrafast nonlinear optics of Coulomb-coupled semiconductor quantum dots: Rabi
oscillations and pump-probe spectra. Physical Review B, 73(16),
165318-165318–18. https://doi.org/10.1103/physrevb.73.165318'
bibtex: '@article{Danckwerts_Ahn_Förstner_Knorr_2006, title={Theory of ultrafast
nonlinear optics of Coulomb-coupled semiconductor quantum dots: Rabi oscillations
and pump-probe spectra}, volume={73}, DOI={10.1103/physrevb.73.165318},
number={16}, journal={Physical Review B}, publisher={American Physical Society
(APS)}, author={Danckwerts, J. and Ahn, K. J. and Förstner, Jens and Knorr, A.},
year={2006}, pages={165318-165318–18} }'
chicago: 'Danckwerts, J., K. J. Ahn, Jens Förstner, and A. Knorr. “Theory of Ultrafast
Nonlinear Optics of Coulomb-Coupled Semiconductor Quantum Dots: Rabi Oscillations
and Pump-Probe Spectra.” Physical Review B 73, no. 16 (2006): 165318-165318–18.
https://doi.org/10.1103/physrevb.73.165318.'
ieee: 'J. Danckwerts, K. J. Ahn, J. Förstner, and A. Knorr, “Theory of ultrafast
nonlinear optics of Coulomb-coupled semiconductor quantum dots: Rabi oscillations
and pump-probe spectra,” Physical Review B, vol. 73, no. 16, pp. 165318-165318–18,
2006.'
mla: 'Danckwerts, J., et al. “Theory of Ultrafast Nonlinear Optics of Coulomb-Coupled
Semiconductor Quantum Dots: Rabi Oscillations and Pump-Probe Spectra.” Physical
Review B, vol. 73, no. 16, American Physical Society (APS), 2006, pp. 165318-165318–18,
doi:10.1103/physrevb.73.165318.'
short: J. Danckwerts, K.J. Ahn, J. Förstner, A. Knorr, Physical Review B 73 (2006)
165318-165318–18.
date_created: 2018-08-29T08:30:58Z
date_updated: 2022-01-06T07:00:41Z
ddc:
- '530'
doi: 10.1103/physrevb.73.165318
extern: '1'
file:
- access_level: open_access
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-29T08:33:00Z
date_updated: 2018-09-04T19:59:29Z
file_id: '4245'
file_name: 2006 Danckwerts,Ahn,Förster,Knorr_Theory of ultrafast nonlinear optics
of Coulomb-coupled semiconductor quantum dots Rabi oscillations and pump-probe
spectra.pdf
file_size: 254366
relation: main_file
file_date_updated: 2018-09-04T19:59:29Z
has_accepted_license: '1'
intvolume: ' 73'
issue: '16'
keyword:
- tet_topic_qd
language:
- iso: eng
oa: '1'
page: 165318-165318-18
publication: Physical Review B
publication_identifier:
issn:
- 1098-0121
- 1550-235X
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Theory of ultrafast nonlinear optics of Coulomb-coupled semiconductor quantum
dots: Rabi oscillations and pump-probe spectra'
type: journal_article
urn: '42430'
user_id: '158'
volume: 73
year: '2006'
...
---
_id: '4191'
abstract:
- lang: eng
text: 'We study optical second-harmonic generation from planar arrays of magnetic
split-ring resonators at 1.5 microns resonance wavelength. We obtain by far the
largest signals when exciting the magnetic-dipole resonance. '
article_number: TuC5
author:
- first_name: Matthias W.
full_name: Klein, Matthias W.
last_name: Klein
- first_name: Christian
full_name: Enkrich, Christian
last_name: Enkrich
- first_name: Martin
full_name: Wegener, Martin
last_name: Wegener
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Jerome V.
full_name: Moloney, Jerome V.
last_name: Moloney
- first_name: Walter
full_name: Hoyer, Walter
last_name: Hoyer
- first_name: Tineke
full_name: Stroucken, Tineke
last_name: Stroucken
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Stephan W.
full_name: Koch, Stephan W.
last_name: Koch
- first_name: Stefan
full_name: Linden, Stefan
last_name: Linden
citation:
ama: 'Klein MW, Enkrich C, Wegener M, et al. Optical Experiments on Second-Harmonic
Generation with Metamaterials Composed of Split-Ring Resonators. In: Photonic
Metamaterials: From Random to Periodic. OSA; 2006. doi:10.1364/meta.2006.tuc5'
apa: 'Klein, M. W., Enkrich, C., Wegener, M., Förstner, J., Moloney, J. V., Hoyer,
W., Stroucken, T., Meier, T., Koch, S. W., & Linden, S. (2006). Optical Experiments
on Second-Harmonic Generation with Metamaterials Composed of Split-Ring Resonators.
Photonic Metamaterials: From Random to Periodic, Article TuC5. https://doi.org/10.1364/meta.2006.tuc5'
bibtex: '@inproceedings{Klein_Enkrich_Wegener_Förstner_Moloney_Hoyer_Stroucken_Meier_Koch_Linden_2006,
title={Optical Experiments on Second-Harmonic Generation with Metamaterials Composed
of Split-Ring Resonators}, DOI={10.1364/meta.2006.tuc5},
number={TuC5}, booktitle={Photonic Metamaterials: From Random to Periodic}, publisher={OSA},
author={Klein, Matthias W. and Enkrich, Christian and Wegener, Martin and Förstner,
Jens and Moloney, Jerome V. and Hoyer, Walter and Stroucken, Tineke and Meier,
Torsten and Koch, Stephan W. and Linden, Stefan}, year={2006} }'
chicago: 'Klein, Matthias W., Christian Enkrich, Martin Wegener, Jens Förstner,
Jerome V. Moloney, Walter Hoyer, Tineke Stroucken, Torsten Meier, Stephan W. Koch,
and Stefan Linden. “Optical Experiments on Second-Harmonic Generation with Metamaterials
Composed of Split-Ring Resonators.” In Photonic Metamaterials: From Random
to Periodic. OSA, 2006. https://doi.org/10.1364/meta.2006.tuc5.'
ieee: 'M. W. Klein et al., “Optical Experiments on Second-Harmonic Generation
with Metamaterials Composed of Split-Ring Resonators,” 2006, doi: 10.1364/meta.2006.tuc5.'
mla: 'Klein, Matthias W., et al. “Optical Experiments on Second-Harmonic Generation
with Metamaterials Composed of Split-Ring Resonators.” Photonic Metamaterials:
From Random to Periodic, TuC5, OSA, 2006, doi:10.1364/meta.2006.tuc5.'
short: 'M.W. Klein, C. Enkrich, M. Wegener, J. Förstner, J.V. Moloney, W. Hoyer,
T. Stroucken, T. Meier, S.W. Koch, S. Linden, in: Photonic Metamaterials: From
Random to Periodic, OSA, 2006.'
date_created: 2018-08-28T10:36:37Z
date_updated: 2025-12-16T11:25:31Z
department:
- _id: '15'
- _id: '293'
- _id: '170'
- _id: '230'
- _id: '35'
- _id: '34'
- _id: '61'
doi: 10.1364/meta.2006.tuc5
extern: '1'
keyword:
- tet_topic_meta
language:
- iso: eng
publication: 'Photonic Metamaterials: From Random to Periodic'
publication_identifier:
isbn:
- 155752808X
publication_status: published
publisher: OSA
status: public
title: Optical Experiments on Second-Harmonic Generation with Metamaterials Composed
of Split-Ring Resonators
type: conference
user_id: '16199'
year: '2006'
...