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W.","last_name":"Samuel","full_name":"Samuel, Ifor D. W."}],"title":"Dynamics of photoexcitation and stimulated optical emission in conjugated polymers: A multiscale quantum-chemistry and Maxwell-Bloch-equations approach","year":"2010","status":"public","publication_status":"published","date_updated":"2025-12-16T08:02:49Z"},{"type":"journal_article","department":[{"_id":"296"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"}],"file":[{"description":"© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim","date_created":"2020-08-28T14:38:30Z","creator":"schindlm","title":"Electronic structure and effective masses in strained silicon","content_type":"application/pdf","file_id":"18582","date_updated":"2020-08-30T15:13:32Z","relation":"main_file","file_size":118792,"access_level":"closed","file_name":"pssc.200982470.pdf"}],"date_created":"2020-08-28T11:35:38Z","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."}],"publication":"Physica Status Solidi C","issue":"2","doi":"10.1002/pssc.200982470","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-12-16T08:10:05Z","article_type":"original","intvolume":"         7","title":"Electronic structure and effective masses in strained silicon","year":"2010","author":[{"full_name":"Bouhassoune, Mohammed","first_name":"Mohammed","last_name":"Bouhassoune"},{"first_name":"Arno","orcid":"0000-0002-4855-071X","last_name":"Schindlmayr","full_name":"Schindlmayr, Arno","id":"458"}],"publication_identifier":{"issn":["1862-6351"],"eissn":["1610-1642"]},"external_id":{"isi":["000284313000081"]},"quality_controlled":"1","file_date_updated":"2020-08-30T15:13:32Z","citation":{"chicago":"Bouhassoune, Mohammed, and Arno Schindlmayr. “Electronic Structure and Effective Masses in Strained Silicon.” <i>Physica Status Solidi C</i> 7, no. 2 (2010): 460–63. <a href=\"https://doi.org/10.1002/pssc.200982470\">https://doi.org/10.1002/pssc.200982470</a>.","short":"M. Bouhassoune, A. Schindlmayr, Physica Status Solidi C 7 (2010) 460–463.","ieee":"M. Bouhassoune and A. Schindlmayr, “Electronic structure and effective masses in strained silicon,” <i>Physica Status Solidi C</i>, vol. 7, no. 2, pp. 460–463, 2010, doi: <a href=\"https://doi.org/10.1002/pssc.200982470\">10.1002/pssc.200982470</a>.","apa":"Bouhassoune, M., &#38; Schindlmayr, A. (2010). Electronic structure and effective masses in strained silicon. <i>Physica Status Solidi C</i>, <i>7</i>(2), 460–463. <a href=\"https://doi.org/10.1002/pssc.200982470\">https://doi.org/10.1002/pssc.200982470</a>","bibtex":"@article{Bouhassoune_Schindlmayr_2010, title={Electronic structure and effective masses in strained silicon}, volume={7}, DOI={<a href=\"https://doi.org/10.1002/pssc.200982470\">10.1002/pssc.200982470</a>}, number={2}, journal={Physica Status Solidi C}, publisher={Wiley-VCH}, author={Bouhassoune, Mohammed and Schindlmayr, Arno}, year={2010}, pages={460–463} }","ama":"Bouhassoune M, Schindlmayr A. Electronic structure and effective masses in strained silicon. <i>Physica Status Solidi C</i>. 2010;7(2):460-463. doi:<a href=\"https://doi.org/10.1002/pssc.200982470\">10.1002/pssc.200982470</a>","mla":"Bouhassoune, Mohammed, and Arno Schindlmayr. “Electronic Structure and Effective Masses in Strained Silicon.” <i>Physica Status Solidi C</i>, vol. 7, no. 2, Wiley-VCH, 2010, pp. 460–63, doi:<a href=\"https://doi.org/10.1002/pssc.200982470\">10.1002/pssc.200982470</a>."},"isi":"1","user_id":"16199","ddc":["530"],"volume":7,"page":"460-463","_id":"18562","publisher":"Wiley-VCH","has_accepted_license":"1","status":"public","conference":{"end_date":"2009-07-10","start_date":"2009-07-05","name":"12th International Conference on the Formation of Semiconductor Interfaces","location":"Weimar"}},{"place":"München","citation":{"chicago":"Schindlmayr, Arno, Christoph Friedrich, Ersoy Şaşıoğlu, and Stefan Blügel. “First-Principles Calculation of Electronic Excitations in Solids with SPEX.” In <i>Modern and Universal First-Principles Methods for Many-Electron Systems in Chemistry and Physics</i>, edited by Franz Michael Dolg, 3:67–78. Progress in Physical Chemistry. München: Oldenbourg, 2010. <a href=\"https://doi.org/10.1524/9783486711639.67\">https://doi.org/10.1524/9783486711639.67</a>.","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.","ama":"Schindlmayr A, Friedrich C, Şaşıoğlu E, Blügel S. First-principles calculation of electronic excitations in solids with SPEX. In: Dolg FM, ed. <i>Modern and Universal First-Principles Methods for Many-Electron Systems in Chemistry and Physics</i>. Vol 3. Progress in Physical Chemistry. Oldenbourg; 2010:67-78. doi:<a href=\"https://doi.org/10.1524/9783486711639.67\">10.1524/9783486711639.67</a>","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={<a href=\"https://doi.org/10.1524/9783486711639.67\">10.1524/9783486711639.67</a>}, 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} }","apa":"Schindlmayr, A., Friedrich, C., Şaşıoğlu, E., &#38; Blügel, S. (2010). First-principles calculation of electronic excitations in solids with SPEX. In F. M. Dolg (Ed.), <i>Modern and Universal First-Principles Methods for Many-Electron Systems in Chemistry and Physics</i> (Vol. 3, pp. 67–78). Oldenbourg. <a href=\"https://doi.org/10.1524/9783486711639.67\">https://doi.org/10.1524/9783486711639.67</a>","mla":"Schindlmayr, Arno, et al. “First-Principles Calculation of Electronic Excitations in Solids with SPEX.” <i>Modern and Universal First-Principles Methods for Many-Electron Systems in Chemistry and Physics</i>, edited by Franz Michael Dolg, vol. 3, Oldenbourg, 2010, pp. 67–78, doi:<a href=\"https://doi.org/10.1524/9783486711639.67\">10.1524/9783486711639.67</a>.","ieee":"A. Schindlmayr, C. Friedrich, E. Şaşıoğlu, and S. Blügel, “First-principles calculation of electronic excitations in solids with SPEX,” in <i>Modern and Universal First-Principles Methods for Many-Electron Systems in Chemistry and Physics</i>, vol. 3, F. M. Dolg, Ed. München: Oldenbourg, 2010, pp. 67–78."},"quality_controlled":"1","page":"67-78","_id":"18549","publisher":"Oldenbourg","user_id":"16199","editor":[{"full_name":"Dolg, Franz Michael","last_name":"Dolg","first_name":"Franz Michael"}],"volume":3,"status":"public","date_created":"2020-08-28T11:03:04Z","type":"book_chapter","department":[{"_id":"296"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"}],"publication":"Modern and Universal First-Principles Methods for Many-Electron Systems in Chemistry and Physics","abstract":[{"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.","lang":"eng"}],"series_title":"Progress in Physical Chemistry","language":[{"iso":"eng"}],"doi":"10.1524/9783486711639.67","year":"2010","title":"First-principles calculation of electronic excitations in solids with SPEX","author":[{"id":"458","orcid":"0000-0002-4855-071X","last_name":"Schindlmayr","first_name":"Arno","full_name":"Schindlmayr, Arno"},{"last_name":"Friedrich","first_name":"Christoph","full_name":"Friedrich, Christoph"},{"last_name":"Şaşıoğlu","first_name":"Ersoy","full_name":"Şaşıoğlu, Ersoy"},{"full_name":"Blügel, Stefan","last_name":"Blügel","first_name":"Stefan"}],"publication_identifier":{"eisbn":["978-3-486-71163-9"],"isbn":["978-3-486-59827-8"]},"date_updated":"2025-12-16T08:09:01Z","publication_status":"published","intvolume":"         3"},{"date_created":"2020-08-28T11:31:26Z","file":[{"creator":"schindlm","description":"© 2010 American Physical Society","date_created":"2020-08-28T11:33:17Z","relation":"main_file","date_updated":"2020-08-30T15:06:10Z","file_name":"PhysRevB.81.054434.pdf","access_level":"open_access","file_size":711970,"title":"Wannier-function approach to spin excitations in solids","file_id":"18561","content_type":"application/pdf"}],"department":[{"_id":"296"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"}],"type":"journal_article","publication":"Physical Review B","issue":"5","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."}],"language":[{"iso":"eng"}],"article_number":"054434","doi":"10.1103/PhysRevB.81.054434","publication_identifier":{"issn":["1098-0121"],"eissn":["1550-235X"]},"author":[{"full_name":"Şaşıoğlu, Ersoy","last_name":"Şaşıoğlu","first_name":"Ersoy"},{"last_name":"Schindlmayr","first_name":"Arno","orcid":"0000-0002-4855-071X","full_name":"Schindlmayr, Arno","id":"458"},{"first_name":"Christoph","last_name":"Friedrich","full_name":"Friedrich, Christoph"},{"full_name":"Freimuth, Frank","last_name":"Freimuth","first_name":"Frank"},{"first_name":"Stefan","last_name":"Blügel","full_name":"Blügel, Stefan"}],"title":"Wannier-function approach to spin excitations in solids","year":"2010","intvolume":"        81","article_type":"original","date_updated":"2025-12-16T11:09:51Z","publication_status":"published","external_id":{"arxiv":["1002.4897"],"isi":["000274998000084"]},"oa":"1","isi":"1","citation":{"bibtex":"@article{Şaşıoğlu_Schindlmayr_Friedrich_Freimuth_Blügel_2010, title={Wannier-function approach to spin excitations in solids}, volume={81}, DOI={<a href=\"https://doi.org/10.1103/PhysRevB.81.054434\">10.1103/PhysRevB.81.054434</a>}, 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} }","ama":"Şaşıoğlu E, Schindlmayr A, Friedrich C, Freimuth F, Blügel S. Wannier-function approach to spin excitations in solids. <i>Physical Review B</i>. 2010;81(5). doi:<a href=\"https://doi.org/10.1103/PhysRevB.81.054434\">10.1103/PhysRevB.81.054434</a>","short":"E. Şaşıoğlu, A. Schindlmayr, C. Friedrich, F. Freimuth, S. Blügel, Physical Review B 81 (2010).","chicago":"Şaşıoğlu, Ersoy, Arno Schindlmayr, Christoph Friedrich, Frank Freimuth, and Stefan Blügel. “Wannier-Function Approach to Spin Excitations in Solids.” <i>Physical Review B</i> 81, no. 5 (2010). <a href=\"https://doi.org/10.1103/PhysRevB.81.054434\">https://doi.org/10.1103/PhysRevB.81.054434</a>.","ieee":"E. Şaşıoğlu, A. Schindlmayr, C. Friedrich, F. Freimuth, and S. Blügel, “Wannier-function approach to spin excitations in solids,” <i>Physical Review B</i>, vol. 81, no. 5, Art. no. 054434, 2010, doi: <a href=\"https://doi.org/10.1103/PhysRevB.81.054434\">10.1103/PhysRevB.81.054434</a>.","mla":"Şaşıoğlu, Ersoy, et al. “Wannier-Function Approach to Spin Excitations in Solids.” <i>Physical Review B</i>, vol. 81, no. 5, 054434, American Physical Society, 2010, doi:<a href=\"https://doi.org/10.1103/PhysRevB.81.054434\">10.1103/PhysRevB.81.054434</a>.","apa":"Şaşıoğlu, E., Schindlmayr, A., Friedrich, C., Freimuth, F., &#38; Blügel, S. (2010). Wannier-function approach to spin excitations in solids. <i>Physical Review B</i>, <i>81</i>(5), Article 054434. <a href=\"https://doi.org/10.1103/PhysRevB.81.054434\">https://doi.org/10.1103/PhysRevB.81.054434</a>"},"file_date_updated":"2020-08-30T15:06:10Z","quality_controlled":"1","publisher":"American Physical Society","_id":"18560","volume":81,"ddc":["530"],"user_id":"16199","status":"public","has_accepted_license":"1"},{"page":"357-368","publisher":"Oldenbourg","_id":"18557","ddc":["530"],"user_id":"16199","volume":224,"status":"public","has_accepted_license":"1","external_id":{"isi":["000281124800006"],"arxiv":["1110.1596"]},"file_date_updated":"2020-08-30T15:04:39Z","isi":"1","citation":{"ieee":"A. Schindlmayr, C. Friedrich, E. Şaşıoğlu, and S. Blügel, “First-principles calculation of electronic excitations in solids with SPEX,” <i>Zeitschrift für Physikalische Chemie</i>, vol. 224, no. 3–4, pp. 357–368, 2010, doi: <a href=\"https://doi.org/10.1524/zpch.2010.6110\">10.1524/zpch.2010.6110</a>.","apa":"Schindlmayr, A., Friedrich, C., Şaşıoğlu, E., &#38; Blügel, S. (2010). First-principles calculation of electronic excitations in solids with SPEX. <i>Zeitschrift Für Physikalische Chemie</i>, <i>224</i>(3–4), 357–368. <a href=\"https://doi.org/10.1524/zpch.2010.6110\">https://doi.org/10.1524/zpch.2010.6110</a>","short":"A. Schindlmayr, C. Friedrich, E. Şaşıoğlu, S. Blügel, Zeitschrift Für Physikalische Chemie 224 (2010) 357–368.","chicago":"Schindlmayr, Arno, Christoph Friedrich, Ersoy Şaşıoğlu, and Stefan Blügel. “First-Principles Calculation of Electronic Excitations in Solids with SPEX.” <i>Zeitschrift Für Physikalische Chemie</i> 224, no. 3–4 (2010): 357–68. <a href=\"https://doi.org/10.1524/zpch.2010.6110\">https://doi.org/10.1524/zpch.2010.6110</a>.","mla":"Schindlmayr, Arno, et al. “First-Principles Calculation of Electronic Excitations in Solids with SPEX.” <i>Zeitschrift Für Physikalische Chemie</i>, vol. 224, no. 3–4, Oldenbourg, 2010, pp. 357–68, doi:<a href=\"https://doi.org/10.1524/zpch.2010.6110\">10.1524/zpch.2010.6110</a>.","bibtex":"@article{Schindlmayr_Friedrich_Şaşıoğlu_Blügel_2010, title={First-principles calculation of electronic excitations in solids with SPEX}, volume={224}, DOI={<a href=\"https://doi.org/10.1524/zpch.2010.6110\">10.1524/zpch.2010.6110</a>}, 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} }","ama":"Schindlmayr A, Friedrich C, Şaşıoğlu E, Blügel S. First-principles calculation of electronic excitations in solids with SPEX. <i>Zeitschrift für Physikalische Chemie</i>. 2010;224(3-4):357-368. doi:<a href=\"https://doi.org/10.1524/zpch.2010.6110\">10.1524/zpch.2010.6110</a>"},"quality_controlled":"1","language":[{"iso":"eng"}],"doi":"10.1524/zpch.2010.6110","year":"2010","title":"First-principles calculation of electronic excitations in solids with SPEX","author":[{"id":"458","full_name":"Schindlmayr, Arno","last_name":"Schindlmayr","orcid":"0000-0002-4855-071X","first_name":"Arno"},{"first_name":"Christoph","last_name":"Friedrich","full_name":"Friedrich, Christoph"},{"first_name":"Ersoy","last_name":"Şaşıoğlu","full_name":"Şaşıoğlu, Ersoy"},{"first_name":"Stefan","last_name":"Blügel","full_name":"Blügel, Stefan"}],"publication_identifier":{"eissn":["2196-7156"],"issn":["0942-9352"]},"date_updated":"2025-12-16T11:09:01Z","publication_status":"published","intvolume":"       224","article_type":"original","file":[{"title":"First-principles calculation of electronic excitations in solids with SPEX","file_id":"18581","content_type":"application/pdf","relation":"main_file","date_updated":"2020-08-30T15:04:39Z","file_name":"zpch.2010.6110.pdf","access_level":"closed","file_size":912086,"description":"© 2010 Oldenbourg Wissenschaftsverlag, München","date_created":"2020-08-28T14:34:10Z","creator":"schindlm"}],"date_created":"2020-08-28T11:20:50Z","type":"journal_article","department":[{"_id":"296"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"}],"issue":"3-4","publication":"Zeitschrift für Physikalische Chemie","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."}]},{"publisher":"American Physical Society (APS)","_id":"4177","volume":81,"ddc":["530"],"user_id":"16199","status":"public","has_accepted_license":"1","citation":{"bibtex":"@article{Kuznetsova_Gőgh_Förstner_Meier_Cundiff_Varga_Thomas_2010, title={Modeling excitonic line shapes in weakly disordered semiconductor nanostructures}, volume={81}, DOI={<a href=\"https://doi.org/10.1103/physrevb.81.075307\">10.1103/physrevb.81.075307</a>}, 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} }","ama":"Kuznetsova I, Gőgh N, Förstner J, et al. Modeling excitonic line shapes in weakly disordered semiconductor nanostructures. <i>Physical Review B</i>. 2010;81(7). doi:<a href=\"https://doi.org/10.1103/physrevb.81.075307\">10.1103/physrevb.81.075307</a>","mla":"Kuznetsova, I., et al. “Modeling Excitonic Line Shapes in Weakly Disordered Semiconductor Nanostructures.” <i>Physical Review B</i>, vol. 81, no. 7, 075307, American Physical Society (APS), 2010, doi:<a href=\"https://doi.org/10.1103/physrevb.81.075307\">10.1103/physrevb.81.075307</a>.","short":"I. Kuznetsova, N. Gőgh, J. Förstner, T. Meier, S.T. Cundiff, I. Varga, P. Thomas, Physical Review B 81 (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.” <i>Physical Review B</i> 81, no. 7 (2010). <a href=\"https://doi.org/10.1103/physrevb.81.075307\">https://doi.org/10.1103/physrevb.81.075307</a>.","ieee":"I. Kuznetsova <i>et al.</i>, “Modeling excitonic line shapes in weakly disordered semiconductor nanostructures,” <i>Physical Review B</i>, vol. 81, no. 7, Art. no. 075307, 2010, doi: <a href=\"https://doi.org/10.1103/physrevb.81.075307\">10.1103/physrevb.81.075307</a>.","apa":"Kuznetsova, I., Gőgh, N., Förstner, J., Meier, T., Cundiff, S. T., Varga, I., &#38; Thomas, P. (2010). Modeling excitonic line shapes in weakly disordered semiconductor nanostructures. <i>Physical Review B</i>, <i>81</i>(7), Article 075307. <a href=\"https://doi.org/10.1103/physrevb.81.075307\">https://doi.org/10.1103/physrevb.81.075307</a>"},"file_date_updated":"2018-08-28T09:13:01Z","language":[{"iso":"eng"}],"article_number":"075307","doi":"10.1103/physrevb.81.075307","publication_identifier":{"issn":["1098-0121","1550-235X"]},"author":[{"full_name":"Kuznetsova, I.","last_name":"Kuznetsova","first_name":"I."},{"last_name":"Gőgh","first_name":"N.","full_name":"Gőgh, N."},{"full_name":"Förstner, Jens","last_name":"Förstner","first_name":"Jens","orcid":"0000-0001-7059-9862","id":"158"},{"full_name":"Meier, Torsten","orcid":"0000-0001-8864-2072","first_name":"Torsten","last_name":"Meier","id":"344"},{"full_name":"Cundiff, S. T.","last_name":"Cundiff","first_name":"S. T."},{"full_name":"Varga, I.","last_name":"Varga","first_name":"I."},{"full_name":"Thomas, P.","last_name":"Thomas","first_name":"P."}],"title":"Modeling excitonic line shapes in weakly disordered semiconductor nanostructures","year":"2010","intvolume":"        81","article_type":"original","date_updated":"2025-12-16T11:24:45Z","publication_status":"published","date_created":"2018-08-28T09:09:37Z","file":[{"content_type":"application/pdf","success":1,"file_id":"4178","access_level":"closed","file_size":713758,"file_name":"2010 Kuznetsova,Gögh,Förstner,Meier T,Cundiff, Varga,Thomas_Modeling excitonic line shapes in weakly disordered semiconductor nanostructures.pdf","date_updated":"2018-08-28T09:13:01Z","relation":"main_file","date_created":"2018-08-28T09:13:01Z","creator":"hclaudia"}],"department":[{"_id":"15"},{"_id":"293"},{"_id":"170"},{"_id":"230"},{"_id":"35"},{"_id":"34"},{"_id":"61"}],"keyword":["tet_topic_qw"],"type":"journal_article","issue":"7","publication":"Physical Review B","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."}]},{"publication_identifier":{"issn":["1569-4410"]},"author":[{"first_name":"S.","last_name":"Declair","full_name":"Declair, S."},{"full_name":"Meier, Cedrik","orcid":"https://orcid.org/0000-0002-3787-3572","last_name":"Meier","first_name":"Cedrik","id":"20798"},{"full_name":"Meier, Torsten","first_name":"Torsten","orcid":"0000-0001-8864-2072","last_name":"Meier","id":"344"},{"last_name":"Förstner","first_name":"Jens","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"year":"2010","title":"Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic environment","intvolume":"         8","article_type":"original","date_updated":"2025-12-16T11:23:48Z","publication_status":"published","language":[{"iso":"eng"}],"doi":"10.1016/j.photonics.2010.03.002","issue":"4","publication":"Photonics and Nanostructures - Fundamentals and Applications","abstract":[{"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.","lang":"eng"}],"date_created":"2018-08-27T10:19:59Z","file":[{"success":1,"content_type":"application/pdf","file_id":"4126","date_updated":"2018-08-27T10:21:38Z","relation":"main_file","file_size":304758,"access_level":"closed","file_name":"2010 Declair,Meier C, Meier T, Förstner_Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic environment.pdf","date_created":"2018-08-27T10:21:38Z","creator":"hclaudia"}],"department":[{"_id":"15"},{"_id":"230"},{"_id":"293"},{"_id":"287"},{"_id":"35"},{"_id":"170"},{"_id":"35"},{"_id":"34"},{"_id":"61"}],"keyword":["tet_topic_microdisk"],"type":"journal_article","status":"public","has_accepted_license":"1","_id":"4125","publisher":"Elsevier BV","page":"273-277","volume":8,"ddc":["530"],"user_id":"16199","citation":{"apa":"Declair, S., Meier, C., Meier, T., &#38; Förstner, J. (2010). Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic environment. <i>Photonics and Nanostructures - Fundamentals and Applications</i>, <i>8</i>(4), 273–277. <a href=\"https://doi.org/10.1016/j.photonics.2010.03.002\">https://doi.org/10.1016/j.photonics.2010.03.002</a>","ieee":"S. Declair, C. Meier, T. Meier, and J. Förstner, “Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic environment,” <i>Photonics and Nanostructures - Fundamentals and Applications</i>, vol. 8, no. 4, pp. 273–277, 2010, doi: <a href=\"https://doi.org/10.1016/j.photonics.2010.03.002\">10.1016/j.photonics.2010.03.002</a>.","short":"S. Declair, C. Meier, T. Meier, J. Förstner, Photonics and Nanostructures - Fundamentals and Applications 8 (2010) 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.” <i>Photonics and Nanostructures - Fundamentals and Applications</i> 8, no. 4 (2010): 273–77. <a href=\"https://doi.org/10.1016/j.photonics.2010.03.002\">https://doi.org/10.1016/j.photonics.2010.03.002</a>.","mla":"Declair, S., et al. “Anticrossing of Whispering Gallery Modes in Microdisk Resonators Embedded in an Anisotropic Environment.” <i>Photonics and Nanostructures - Fundamentals and Applications</i>, vol. 8, no. 4, Elsevier BV, 2010, pp. 273–77, doi:<a href=\"https://doi.org/10.1016/j.photonics.2010.03.002\">10.1016/j.photonics.2010.03.002</a>.","ama":"Declair S, Meier C, Meier T, Förstner J. Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic environment. <i>Photonics and Nanostructures - Fundamentals and Applications</i>. 2010;8(4):273-277. doi:<a href=\"https://doi.org/10.1016/j.photonics.2010.03.002\">10.1016/j.photonics.2010.03.002</a>","bibtex":"@article{Declair_Meier_Meier_Förstner_2010, title={Anticrossing of Whispering Gallery Modes in microdisk resonators embedded in an anisotropic environment}, volume={8}, DOI={<a href=\"https://doi.org/10.1016/j.photonics.2010.03.002\">10.1016/j.photonics.2010.03.002</a>}, 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} }"},"file_date_updated":"2018-08-27T10:21:38Z"},{"publication_identifier":{"issn":["1749-4885","1749-4893"]},"author":[{"last_name":"Michaelis de Vasconcellos","first_name":"S.","full_name":"Michaelis de Vasconcellos, S."},{"full_name":"Gordon, S.","last_name":"Gordon","first_name":"S."},{"full_name":"Bichler, M.","first_name":"M.","last_name":"Bichler"},{"id":"344","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten","full_name":"Meier, Torsten"},{"id":"606","last_name":"Zrenner","first_name":"Artur","orcid":"0000-0002-5190-0944","full_name":"Zrenner, Artur"}],"title":"Coherent control of a single exciton qubit by optoelectronic manipulation","year":"2010","intvolume":"         4","article_type":"original","date_updated":"2025-12-16T11:22:52Z","publication_status":"published","language":[{"iso":"eng"}],"doi":"10.1038/nphoton.2010.124","publication":"Nature Photonics","issue":"8","abstract":[{"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.","lang":"eng"}],"date_created":"2018-09-20T12:19:52Z","department":[{"_id":"15"},{"_id":"230"},{"_id":"35"},{"_id":"170"},{"_id":"293"},{"_id":"35"}],"type":"journal_article","status":"public","publisher":"Springer Nature","_id":"4547","page":"545-548","volume":4,"user_id":"16199","citation":{"apa":"Michaelis de Vasconcellos, S., Gordon, S., Bichler, M., Meier, T., &#38; Zrenner, A. (2010). Coherent control of a single exciton qubit by optoelectronic manipulation. <i>Nature Photonics</i>, <i>4</i>(8), 545–548. <a href=\"https://doi.org/10.1038/nphoton.2010.124\">https://doi.org/10.1038/nphoton.2010.124</a>","ieee":"S. Michaelis de Vasconcellos, S. Gordon, M. Bichler, T. Meier, and A. Zrenner, “Coherent control of a single exciton qubit by optoelectronic manipulation,” <i>Nature Photonics</i>, vol. 4, no. 8, pp. 545–548, 2010, doi: <a href=\"https://doi.org/10.1038/nphoton.2010.124\">10.1038/nphoton.2010.124</a>.","short":"S. Michaelis de Vasconcellos, S. Gordon, M. Bichler, T. Meier, A. Zrenner, Nature Photonics 4 (2010) 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.” <i>Nature Photonics</i> 4, no. 8 (2010): 545–48. <a href=\"https://doi.org/10.1038/nphoton.2010.124\">https://doi.org/10.1038/nphoton.2010.124</a>.","mla":"Michaelis de Vasconcellos, S., et al. “Coherent Control of a Single Exciton Qubit by Optoelectronic Manipulation.” <i>Nature Photonics</i>, vol. 4, no. 8, Springer Nature, 2010, pp. 545–48, doi:<a href=\"https://doi.org/10.1038/nphoton.2010.124\">10.1038/nphoton.2010.124</a>.","ama":"Michaelis de Vasconcellos S, Gordon S, Bichler M, Meier T, Zrenner A. Coherent control of a single exciton qubit by optoelectronic manipulation. <i>Nature Photonics</i>. 2010;4(8):545-548. doi:<a href=\"https://doi.org/10.1038/nphoton.2010.124\">10.1038/nphoton.2010.124</a>","bibtex":"@article{Michaelis de Vasconcellos_Gordon_Bichler_Meier_Zrenner_2010, title={Coherent control of a single exciton qubit by optoelectronic manipulation}, volume={4}, DOI={<a href=\"https://doi.org/10.1038/nphoton.2010.124\">10.1038/nphoton.2010.124</a>}, 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} }"}},{"keyword":["tet_topic_qd","tet_topic_microdisk"],"type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"2"},{"_id":"293"},{"_id":"292"},{"_id":"35"},{"_id":"287"},{"_id":"313"},{"_id":"170"}],"file":[{"creator":"hclaudia","date_created":"2018-08-27T10:06:57Z","relation":"main_file","date_updated":"2018-08-27T10:06:57Z","file_name":"2010 Piegdon,Offer,Lork,Urbanski,Hoischen,Kitzerwo, Declair,Förstner_Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator.pdf","access_level":"closed","file_size":403248,"file_id":"4124","content_type":"application/pdf","success":1}],"date_created":"2018-08-27T10:03:35Z","abstract":[{"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.","lang":"eng"}],"publication":"Physica E: Low-dimensional Systems and Nanostructures","issue":"10","doi":"10.1016/j.physe.2009.12.051","language":[{"iso":"eng"}],"date_updated":"2025-12-16T11:32:03Z","publication_status":"published","intvolume":"        42","article_type":"original","year":"2010","title":"Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator","publication_identifier":{"issn":["1386-9477"]},"author":[{"last_name":"Piegdon","first_name":"Karoline A.","full_name":"Piegdon, Karoline A."},{"full_name":"Offer, Matthias","first_name":"Matthias","last_name":"Offer"},{"full_name":"Lorke, Axel","last_name":"Lorke","first_name":"Axel"},{"first_name":"Martin","last_name":"Urbanski","full_name":"Urbanski, Martin"},{"full_name":"Hoischen, Andreas","first_name":"Andreas","last_name":"Hoischen"},{"first_name":"Heinz-Siegfried","last_name":"Kitzerow","full_name":"Kitzerow, Heinz-Siegfried","id":"254"},{"full_name":"Declair, Stefan","first_name":"Stefan","last_name":"Declair"},{"id":"158","full_name":"Förstner, Jens","first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner"},{"id":"344","full_name":"Meier, Torsten","first_name":"Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072"},{"full_name":"Reuter, Dirk","first_name":"Dirk","last_name":"Reuter","id":"37763"},{"last_name":"Wieck","first_name":"Andreas D.","full_name":"Wieck, Andreas D."},{"id":"20798","full_name":"Meier, Cedrik","first_name":"Cedrik","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572"}],"file_date_updated":"2018-08-27T10:06:57Z","citation":{"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., &#38; Meier, C. (2010). Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator. <i>Physica E: Low-Dimensional Systems and Nanostructures</i>, <i>42</i>(10), 2552–2555. <a href=\"https://doi.org/10.1016/j.physe.2009.12.051\">https://doi.org/10.1016/j.physe.2009.12.051</a>","ieee":"K. A. Piegdon <i>et al.</i>, “Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator,” <i>Physica E: Low-dimensional Systems and Nanostructures</i>, vol. 42, no. 10, pp. 2552–2555, 2010, doi: <a href=\"https://doi.org/10.1016/j.physe.2009.12.051\">10.1016/j.physe.2009.12.051</a>.","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.” <i>Physica E: Low-Dimensional Systems and Nanostructures</i> 42, no. 10 (2010): 2552–55. <a href=\"https://doi.org/10.1016/j.physe.2009.12.051\">https://doi.org/10.1016/j.physe.2009.12.051</a>.","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.","mla":"Piegdon, Karoline A., et al. “Self-Assembled Quantum Dots in a Liquid-Crystal-Tunable Microdisk Resonator.” <i>Physica E: Low-Dimensional Systems and Nanostructures</i>, vol. 42, no. 10, Elsevier BV, 2010, pp. 2552–55, doi:<a href=\"https://doi.org/10.1016/j.physe.2009.12.051\">10.1016/j.physe.2009.12.051</a>.","ama":"Piegdon KA, Offer M, Lorke A, et al. Self-assembled quantum dots in a liquid-crystal-tunable microdisk resonator. <i>Physica E: Low-dimensional Systems and Nanostructures</i>. 2010;42(10):2552-2555. doi:<a href=\"https://doi.org/10.1016/j.physe.2009.12.051\">10.1016/j.physe.2009.12.051</a>","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={<a href=\"https://doi.org/10.1016/j.physe.2009.12.051\">10.1016/j.physe.2009.12.051</a>}, 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} }"},"ddc":["530"],"user_id":"16199","volume":42,"page":"2552-2555","_id":"4123","publisher":"Elsevier BV","has_accepted_license":"1","status":"public"}]